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Coco shells
Both men decided to make a "'Molluscan Survey" of the coast by dredging and skin-diving from Rio de Janerio to Rio Grande do
Norte including the Fernando de Noronha Ids. which are located 800 kilometers from the mainland. In so doing, they collected
over 50 species of shells not recorded from this area, as well as over 20 species thought to be new to science.
Off Bahia, they collected over six specimens of the rare Strombus goliath and were able to lay out the growth series shown on
page 5 [above].
Description of Pusula (Dolichunis) producta:
Ovate and humped, with broadened, somewhat angled sides and produced extremities. White in colour throughout, with transverse
ribs crossing the dorsum completely and extending over the margins and base onto the columella. The transverse ribs are
white, elevated, sharply cut, and the interstices are broad and crenulate; a dorsal groove is absent and the spire is
covered. Base is flattish, labial lip broad, slightly convex and fairly straight; aperture is of medium width, widening
slightly anteriorly. The posterior outlet is deeply cut, fossula is very broad, concave, ribbed, and extending towards the
labial wall.
Size of illustrated specimen: L: 11.8mm, W: 72%, H: 55%, Lab. teeth: 23, Coll. teeth: 19, Dorsal ribs: 28, Marginal ribs: 41
(The width and height are expressed in the percentage of the length; the dorsal and marginal ribs are counted on both sides
of the shell, the 4 - 5 loop-like, vertical ribs at each extremity have been excluded). Iredale's T. excelsa measures as
follows: L: 18mm, W: 72%. H: 56%. The Australian shell is slightly larger than Fiji specimens of Dolichupis producta 10mm -
15mm but otherwise identical. One of Gaskoin's specimens of D. producta measured about 18mm.)
The first specimen of Dolichupis producta was dredged in 1962 by A. Jennings, in 15 - 16 fathoms off the Momi lighthouse
(West Viti Levu), and a total of 6 specimens have been dredged to date from the same locality. Prior to the Fijian record,
there appeared to be only 6 specimens preserved in collections (Dr. Schilder, in litt.): the holotype in the British Museum,
2 specimens in the Saul collection in Cambridge, and one specimen each in Stockholm and coll. Tomlin and Schilder. Locality
indication on these shells was "Indonesia." The fossil Dolichupis soloensis Schilder, 1937 (Ingen. Ned. Indie, (4) 4:200,
fig. 18) from the Pleistocene of Java, might be a chronological race of the recent form.
Erronea walkeri Sowerby is a rather uncommon cowry species so that it is absent in many collections (Schilder 1940, Arch.
Mollusk. 72:168) and the limits of its distribution are inaccurately known. In our Prodrome (1938, Proc.Malac. Soc. 23:151)
and in my catalogue of all living and fossil Cypraeacea (1941, Arch. Mollusk. 73:96) four "geographical races" have been
distinguished, characterized chiefly by the color of the shell (1952, Mem. Inst. Belgique (2) 45:125); the geographical
distribution of these four races comprised the following areas: walkeri Sowerby 1832: Seychelles, Cargados, Maldives;
surabajensis Schilder 1937: Philippines, Cochinchina to Lombok and Eastern Indonesia (holotype in lower Pleistocene beds of
Modjokerto, Java); continens Iredale 1935: Torres Strait to Moreton Bay; bregeriana Crosse 1868: New Caledonia (and Louisiade
Archipelago?).
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