SOMK NliW OK NOTICWORTHY SHKLI.S — IIEDLKV. 153 



and concluded that PlcilFei', Cas.sies and otlieis who had 

 attempted to identify C iixclfits had failed to do so. He thouglit 

 that tins shell was represcMited by Aiiricti/a siifciilosd, IMousson.' "^ 

 Afterwards he altered this opinion and re-establisiied* ** C. 

 sidctilosa. Dr. von IMartens seein.s to have been unaware of the 

 falsity of the locality " Otaheite " ascribed to the species in 

 question. Garrett states that no Gassidula penetrates further 

 east into the Pacific than ^amoa."^'-' This statement not only 

 corrects an error but limits the area within wliich C. imcleus is 

 to be .sought. It may be assumed that with Martyn's other shells 

 this was procured by Capt. Cook's expedition. Within the 

 range of the genus, that expedition visited Tanna in the New 

 Heljrides, Baladeand an islet lie Aniere, south of New Caledonia, 

 several places on the east coast of Australia and Pulo Condore, 

 an island south of Cochin China. Had it occurred in the last, 

 Dr. von Martens who made so clo.se a study of the East Indian 

 mangrove mollusca could not iiave failed to recognise it. There 

 is a New Caledonian shell identified by Cros.se^^ and excellently 

 figured by Gassies for C. nucleus. But that consistently diflFers 

 in its pioportions, being shorter and broader than the original 

 illustration. From Cooktown and Moa Island, Torres Strait, 

 there are in this collection specimens whose proportions exactly 

 coincide with the figure in the " Universal Conchologist ". The 

 Queensland shells are 15 mm. long, whereas the figure is 20 mm. 

 If it be permissible to suppose that the artist enlarged his drawing 

 the correspondence would be complete. The figure shows a shell 

 without an upper parietal plait, our specimens show tliat this 

 plait is a senile character which does not appear till the rest 

 of the arn)ament of the aperture has formed. While the 

 " Endeavour" was being repaired on Cooktown bench her people 

 had the opportunity of gathering the species wliere it still occurs. 



CaSSIDULA BILABIATA, S}). nov. 



(Plate xliv., figs. 38, 39, 40). 



Shell small solid ovate, pointed above, obliquely truncate 

 below. Colour buflF, banded with chocolate, sometimes four 

 dark bands are separated by light bands of equal breadth, 

 sometimes the lower bands coalesce, usually a dark and a light 



*'^ Mousson — Land. Siisswass. Moll. Java, 1849, p. 45, pi. v., fig. 8. 



■*8 Martens in Weber — Zool, Erg. Niederland. Ostind.,iv., 1897, p. 143. 



49 Garrett— Proc. Zool. Soc, 1887, p. 297. 



*o Crosse— Journ. de Conch., xlii., 1894, p. .318. 



