ASSIMINEID.E. 



361 



Family ASSIMINEIU^E. 



Geuus ACMELLA, Blanford. 



Acmella, Blauford, A. M. N. H. ser 4, iii, 18(39, p. 178 (as subgenus of 

 /fcYoM/w); Nevill, Hand List,i, 1878, p. 251; Fischer, Man. Conchyl. 

 1885, p. 738: Cooke, (^inibridge Nat. Ilist, iii, 181'5, p. 415; 

 Kobelt & Mullendorff, Nachr. DeiiU-. Malak. Ues. xxx, 1898, 

 p. 153; id., Cat. I'neuni. 1899, p. 73. 



TrPE, Cydostoma tersum, Benson. 



lianije. India, Burma, Andaman and Nicobar Is., Comoro Is., 

 Philippine Is., Xew Guinea, New Caledonia, Polynesia, Loo Clioo 

 Archipelago and Hainan. 



Shell corneous, subeylindraceous, subimperforate, striated longi- 

 tudinally. Peristome a little thickened, margins joined by a tliin 

 callus. Operculum corneous, very thin, paucispii-al ; nucleus 

 sinistral. 



556. Acmella hyalina, Theobald 4' Stoliczlca. 



Acmella hyalina, Theobald & Stoliczka, J. A.S. B. xli, part 2, 

 1872, p. 333, pi. 11, tig. 7; Theobald, Cat. Shells Brit. India, 

 1876, p. 15; Hanlev & Theobald, Conch. Ind. 1870, p. xii ; 

 Nevill, Hand List, i; 1878, p. 251. 



Georissa {Aciiielht) hyalina, Pfeiffer, iMon. Pncum. Suppl. 3, 1876, 

 p. 293. 



Acmella (s. s.) hyalina, Kobelt & MollendoriT, Nachr. Deuts. 

 Malak. Ges. xxx, 1898, p. 153; id., Cat. Pneum. 1899, p. 73. 



Original description : — " Ac. testa ovato conica, modice perforata, 

 hyalina, sordide albida ; spira obtusa ; anfractibus 4| convexi- 

 usculis, sutura simplici et profunda junctis, ad suturam subtrun- 

 catis, laivigatis, ultimo spira paulo breviore, basi convexo ; apt;rtura 

 regulariter ovata, supra (vel postice) subangulata, baud obliqua, 

 peristomate tenui fere continuo. 



" J^ong. 1, lat. U-7 mm. (operculum deest)." 



Hah. Burma: Mouhnaiu ('b7oZu"rZ:«). 



" Of the two known species of the genus, A. tersa and the 



doubtful milium the present new form closely agrees in 



the shape of tlie shell witii the tirst, and in the snioothne«s of the 

 surface with the second." (Theobald <|' Stolic-La.) 



557. Acmella mellilla, Godioin-Ansten. 



Acmella mellilla, Godwin-Austen, Proc Zool. Soc. 1895, p. 453, 



text-fig. c. 

 Acmella (s. s.) mellilla, Kobelt & Miillendortf", Nachr. Ueuts. Malak. 



Ges. xxx, 1898, p. 153 ; id., Cat. Pueum. 1899, p. 73. 



