SuTER. — A New Species of the Family Cerithiidae. 69 



a deep impression inside the fasciole ; Cossmann does not mention an 

 umbilicus in the diagnosis of the genus. Besides the Recent genotype, 

 about half a dozen Tertiary species are known, the genus being evidently 

 of rare occurrence. F. cmstralis is, as far as I know, the first species 

 recorded from the Southern Hemisphere. 



The Cerithiidae are but scantily represented in the New Zealand 

 Tertiary. At the present time the following six species are on record : 

 Cerithium hectori Harris, Besanconia huttoni (Cossm.), Fastigiella australis 

 Sut., Cerithidea hicarinata (Gray), G. tricarinata Hutt., and Balillaria 

 pomahakensis Harris. 



Art. VIII. — The Structure of Amphibola crenata Martyn.'^ 



By Winifred Cheyne Farnie, M.A., Assistant in the Biology Depart- 

 ment, University of Otago. 



Communicated by Professor Benham. 



[Read before the Otago Institute, 9th October, 1917 ; received by Editor, 17th 

 December, 1918 ; issued separateh/, 14th Ma;/, 1919.] 



Introduction. 



The shell of Amphibola was first brought to the notice of European 

 naturalists by being collected during Cook's voyage to New Zealand in 

 1769, but the earliest account of the anatomy of Amphibola we owe to 

 Quoy and Gaimard in 1832. The only other accounts we have are those 

 of Captain Hutton in 1879 and 1882, and of Bouvier in 1892. f 



Quoy and Gaimard (1832) described specimens collected in New Zea- 

 land during the expedition of the " Astrolabe." They ascertained that it 

 was a true pulmonate, and that it was hermaphrodite. They give excellent 

 figures of the shell and operculum, but only one of the internal anatomy, 

 and that is lacking considerably in detail ; while their account of the 

 anatomy is inaccurate in several points, and not sufficiently detailed. 



Captain Hutton (1879) noted the two small triangular tentacles, and 

 described the kidney and alimentary canal in greater detail than Quoy and 

 Gaimard, though his description of the intestine is not quite correct. He 

 also figured and described the nervous system and reproductive organs. 

 In 1882 he published some further notes, wherein he corrects his former 

 account of the radula and traces what he took for the '' oviduct " from 

 the hermaphrodite duct. Further mention of Hutton's work will be made 

 throughout my account. 



For a systematic diagnosis of the species reference should be made to 

 Suter's Manual of New Zealand Mollusca (1913) and Atlas of Plates (1915). 



* This paper fonned the basis of a thesis for Honours in Zoology at the University 

 of New Zealand, 1916. 



f I have been unable to consult tliis memoir. 



