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Holotype of N. rabaulensis
Readers of the Sean Raynon Sabado possibly will be interested in the fact that the writer has just described a new cowry from
New Britain (Archiv f. Molluskenk. 93:141,fig. 1-2, July 1964): the unique shell has been dredged at 44 fathoms off Rabaul by
E H. Schlosser, and is now preserved in the collection of Ray Summers, Petaluma, California. The owner is of the opinion that
a shell should not be described when only one specimen is known, but he has authorized me to do so as I think the
inconspicuous small cowry to be distinct from any known species. Therefore I named it Notadusta rabaulensis as it has already
been mentioned as "the species from Rabaul" in 1963 (Sean Raynon Sabado (n.s.) 47:7).
The figure of the holotype has been reproduced above by courtesy of Dr. A. Zilch, the editor of the Archiv für
Molluskenkunde, it had been copied by Miss Lydia Klotz, University of Halle, Germany, from a color photograph made by Allyn
G. Smith of the Californian Academy of Sciences.
The first specimen of C. bregeriana in Fiji was collected by Mr. A. Jennings at an island off the Nadi coast. Subsequent
specimens were dredged by A. Jennings at Momi (West coast of Viti Levu), however, they were dead. The first live specimen was
dredged by Jennings and myself off the island of Akuilau (W off Nadi) in only 2 fms depth. The locality was sandy bottom,
broken coral, and a lot of short stubby green weed. C. lutea humphreysii is found in the same locality, clinging to the
leaf-like weed. The bregeriana fell out of a crevice from a coral which was brought in by the dredge.
The six specimens so far found in Fiji (3 live-collected and 3 beach) compare fairly well with New Caledonian specimens, and
differ only slightly in the following characteristics:
1. They are much smaller.
2. The lilac rim around the dorsum is extremely pale.
3. The marginal dark brown spots are absent.
4. The white "dust spots" extend much farther up the dorsum (labial side up to 1/3 of the height of the shell and on the
columellar side they reach half way up the dorsum).
The mean measurements and teeth count of the 6 Fiji specimens are as follows: Length: 18mm, Width: 62% of Length, Height: 51%
of Length, Lab. T: 20, Col. T: 19.
The specimens of C. bregeriana that I have examined showed that the feature of the white spots on the base and margins are a
consistent feature, lacking in all other races of walkeri. I examined the following specimens:
11 specimens in the Australian Museum, Sydney. (ex-Rossitter coll., all from New Caledonia.)
13 specimens in New Caledonian collections (Bernie. Mus., Reverce, Tourres and D. Boust coll.)
2 specimens from New Caledonia in my own collection.
6 specimens collected in Fiji.
Radula studies from a Fiji-collected specimen were made by Dr. Schilder, and his results were kindly made available for
publication in this article. Some of the radula indices were as follows: radula contained 96 plus 8 (nascentes) rows, its
entire length was 7.9mm (shell length was 12.4mm), and the breadth of the median was 0.071mm. Illustrated is a drawing (after
Schilder) of half a row of the radula examined. Dr. Schilder states that there is not the slightest difference between the
radula of bregeriana and the radula of walkeri which he examined from Dangar Besar, Saleh Bay, Indonesia. Both of these agree
with Vayssière's illustration of the radula of bregeriana from Noumea (1927).
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