478 Transactions. 



When Hedley and Suter reinstated Cremnobates they were confronted 

 with a description of the animal of Marinula probably drawn up from 

 some other beast. Connolly has persuaded Mr. G. C. Robson to provide 

 an account of the anatomy of the Tristan da Cunha form, and this agrees 

 fairly with that given by Hedley and Suter, but that is too incomplete to 

 make any useful comparisons. 



Connolly has defined the limits of Marinula, including Cremnobates, as 

 antarctic and subantarctic, of circumpolar range, advancing very little to 

 the northward, reaching Moreton Bay in east Australia and the Island of 

 Chiloe in west South America. 



The two Neozelanic species of Marinula then will be : Marinula filholi 

 Hutton, 1878, and M. parva (Swainson, 1855) ; and Cremnobates must be 

 cited in the synonymy of Marinula. 



Genus Siphonaria (Sowerby, Jan., 1824). [P. 597.] 



As an overlooked synonym, should be added : Mouretus Blainville, 

 Diet. Sci. Nat. (Levrault), vol. xxxiii, pp. 161-62, 1824 (after Sowerby). 

 Type : Mouretus adansonii Blainville. 



Kerguelenia innominata nom. no v. [P. 601.] 



Under the name Siphonaria lateralis Gould, 1846, Suter has described 

 a shell occurring at the subantarctic islands of New Zealand : for this shell I 

 provide the above name. As a subgenus-name without reference Liriola Dall, 

 1870, is given ; but when that name was provided Dall wrote (Am. 

 Journ. Conch., vol. vi, 7th July, 1870, p 32), " typified by Siphonaria, 

 thersites Cpr.," and the subantarctic shells do not fall into Dall's group. 



Rochebrune and Mabille (Miss. Sci. Cap Horn, vol. vi, Zool., H, p. 27, 

 1889) introduced Kerguelenia for S. redimiculum Reeve. This name Suter 

 records as a synonym of S. lateralis Gould, but would separate S. tristensis 

 Leach. 



Examination of the British Museum material, where the types of redi- 

 miculum Reeve, macgillivrayi Reeve, tristensis Leach, and paratypes of 

 lateralis Gould are preserved, gives the following results : S. lateralis Gould 

 is quite a distinct species from redimiculum, macgillivrayi, and tristensis, 

 which agree very closely, but seem to be geographical races, according to 

 the series available, quite constant. 



The Neozelanic species does not agree, and consequently I have named 

 it as above. 



The species of Kerguelenia, are recognizable at sight, but the genus would 

 seem to include S. obliquata Sowerby and S. australis Quoy and Gaimard ; 

 but the species S. cookiana Suter and S. zelandica Quoy and Gaimard would 

 be better placed in Siphonaria. Suter observes that the radular characters 

 of S. australis Q. & G. and S. zelandica Q. & G. notably differ. 



Suterella gen. nov. [P. 618.] 



As a representative of the otherwise extra-limital genus Fretum, Suter . 

 admits Helix novarae Pfeiffer, 1862. The synonymy given indicates the 

 peculiar nature of this mollusc, this being the sixth generic location quoted 

 by Suter, four being his own attempts to place it. This last is quite as 

 unsuitable as any of the preceding, as I have examined typical species of 

 Fretum as well as many specimens of the Norfolk Island molluscs unfor- 

 tunately associated by Sykes with the Fijian shells, which are the true 

 Fretum, and the Neozelanic shell shows discord when grouped with these. 



