MOLLUSC A 355 



subgren. Kauaia, nom. nov. 



Carinella Pfr. (1875) nee Sowerby (1839). 



The type of Pfeiffer's group is A. kauaicnsis Newc. : the subgeneric name was 

 used first by Sowerby for a different group of Molluscs. Whether A. alata and 

 A. heliciformis really belong here 1 am not clear. 



(98) Amastra {Kauaia) alata Pfeiffer. 



Helix alata Pfeiffer, P. Zool. Soc. London, 1S56, p. 33. 



I have elsewhere (P. Malac. Soc. London, 11. p. 127) pointed out that all authors 

 have overlooked the fact that this shell has a columellar plait. It is, in my opinion, 

 not a Helicoid at all, but belongs to an aberrant group of Amastra. The columellar 

 plait does not ascend rapidly into the shell, but stands almost horizontally, and has no 

 final 'knob.' The single specimen found by Mr Perkins measures diam. max. 8; alt. 4; 

 alt. apert. 3 mill. 



Hab. Lanai (Pfeiffer); Mts. behind Koele (Perkins). 



(99) A?iiastra [/{anaia) hcliciforviis Ancey. 



Amastra heliciformis Ancey, Bull. Soc. Malac. France, vii. (1890), p. 340. 

 Hab. Oahu, Waianae (Ancey). 



(100) Amastra [Kauaia) kauaiensis Newcomb. 1 



Acliatinella kaiiaiensis Newcomb, Ann. Lye. New York, vii. (April, i860), 

 p. 145; Amer. J. Conch. 11. (1S66), p. 209, pi. xiii. fig. i. 



Acliatinella {Carinella) kauaiensis Newc, Pfeiffer, Novit. Conch, iv. p. 115, 

 pi. cxxvi. figs. 8 — II. 



A good series, principall)- however dead shells, of this almost extinct species. 

 Mr Perkins notes that one specimen was found "with embryonic shells in mouth." 



Hab. Kauai (authors); Halemanu (Baldwin); Makaweli at 2000 ft. and Hale- 

 manu at 4000 feet (Perkins). 



