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Shark teeth
Distribution: The areas from which walkeri has been known to the writer till 1941 have been marked by black circles (walkeri)
and triangles (bregeriana) in the map: The three races of walkeri mentioned above seem to be separated by zones uninhabited
by the species. However, after World War II many new localities became known to us which fill up these gaps, or extend the
limits in northern, eastern, and southern direction. Therefore the following areas should be added, which have been marked,
on the map, by empty circles and triangles respectively:
Andaman Is.:
one pale surabajensis in the museum of Calcutta, sent to me for examination by Dr. Ray in 1957, it came from an old
collection, but the "A'' written originally on the base of the shell makes the correctness of indication rather probable.
Western Sumatra:
two typical walkeri collected in West Sumatra by Aurivillius in 1891, personally examined in the museum of Stockholm in 1957.
- These two areas close the gap between Lemuria and Malaysia.
North West Australia:
one shell (17 mm.) from Peak Is. in the Dampier Archipelago, collected by the Davina Expedition in 1960, presented me (coll.
Schilder No. 11862) by Ray Summers; some more specimens seem to have been collected in the Dampier Archipelago by this
expedition. Besides, walkeri has been mentioned from Nickol Bay by Brazier (1879, Journ. Conch. 2:321).
North Australia:
Yirrkala in Eastern Arnhem Land, according to Iredale (1939, Austr. Zoologist 9:299). - These two areas extend the occurrence
of walkeri to tropical Australia west of Torres Strait.
Aru Is.:
one shell (19 mm.) recalling the western walkeri has been collected by Merton in 1908, personally examined in the Senckenberg
museum in Frankfurt on Main, Germany. - This locality closes the gap between Misool (Schepman 1909, Siboga Exped. 49/2/2:133)
and Torres Strait (Brazier 1879). The indication "New South Wales'' by Iredale (1935, Austr. Zoologist 8:127) needs
confirmation, the southernmost reliable indication in East Australia seems to be Peel Is. in Moreton Bay.
Ryu-kyu Is.:
Kuroda (1960, Cat. Moll. Fauna Okinawa, p. 21) mentioned "walkeri surabajensis" from Okinawa Is.; the indication seems
correct, as P. W. Clover enumerated two specimens of walkeri from "South of Japan'' in a manuscript list of cowries preserved
in Japanese collections (communicated to the writer by Mr. Ray Summers in 1961).
Take for example the splendid cone, Conus prometheus Hwass (which is considered to be the world's largest cone). This shell,
while not rare, is infrequently secured by the Tipos Indicenas tribes, being worn as both an ornament and symbol of wealth by
women of the tribe. The tops of the large cones are neatly sliced off and dangle from strings of beads or leather thongs down
the back of the wearer or hang between their breasts. As a well-to-do native will exchange as much as a full grown cow for a
fine specimen of this shell, it is little wonder that collectors find them difficult to obtain.
Also very popular are the smaller and often rare Cypraea of the region such as zonaria gambiensis, picta, sanguinolenta,
petitiana, and even the West African form of lurida which are formed into strings for head and neck decoration, suplimented
with the more readily secured Cypraea annulus.
To a dedicated collectors, such use of rarities may well seem a desecration of fine shells. However, one had best look at it
philosophically with the thought that the major purpose of shells (once the animal who created them has ceased to have use
for its home) is to bring pleasure to the possessor either asthetically or scientifically and who can say who enjoys them
the most, the native or the specialist.
many shells that come from deeper waters.
We left the Navy Base in Central Zambales at 5 A.M. on December 14, 1963 and traveled south to Subic Bay. There we boarded a
40' boat that I had chartered for the day. Ten Shell Collectors (including wives) and my two children went along on this
trip.
We traveled out of Subic Bay by 8 A.M. and around the southern tip of Zambales along the West Coast of Luzon or South China
Sea to the first big Bay on the coast.
It is called Selangium Bay and is nearly 2 miles long by 2000 feet wide, all reefs and quiet water. We anchored a few hundred
yards in the Bay in about 40' of water at 10 A.M. The reef came up at a 60 degree angle here and you are in 5 to 10 feet of
water. I was the first one in the water and soon picked up a large purple mouth Pleuroploca trapezium that my little girl had
seen from the boat through a view box (or lookie-lookie box). After handing her this shell I swam but a few yards and found a
large 8" pair of Lambis chiragra. I felt this would prove to be a good shelling spot, after such quick luck. (Altogether we
got 8 specimens of L. chiragra)
In two hours of diving for shells in sand, under rocks and breaking coral with a crow bar we all came up with about 100
species of shells over 1" long. On my way back to the boat the last rock I flipped over had a 4" tiger cowry under it much to
my surprise since most of the Cypraea tigris we get in the Philippine are 2" to 3". This was the largest specimen I had seen
outside of Philippines.
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