MOLLUSC A 361 



(20) Leptachatina costulosa Pease. 



Leptacliatina costulosa Pease, P. Zool. Soc. London, 1869, p. 651 (nom. sol.); 

 J. Conchyl. xviii. (1870), p. 90 ; Crosse, 1. c. xxiv. p. 96, pi. in. fig. 4. 



Hab. Kauai (Pease) ; Waimea and Kealia (Baldwin). 



(21) Leptachatina ciystal/ina Gulick. 



Achatinella crystallina Gulick, Ann. Lye. New York, vi. (1856), p. 186, pi. vi. 



fig. 14. 

 Newcomb united this species with his L. nitida. 

 Hab. Oahu, Mokuleia, Kamoo, Waialua (Gulick). 



(22) Leptachatina cmerita, sp. nov. 



Testa elongata, subcylindrica, imperforata, dextrorsa, cornea vel hyalina vel 

 flava, tenuiuscula, sub lente longitudinaliter tenuiter striata, apice obtusulo ; anfr. 6^, 

 plano-convexi, ultimus |- altitudinis testae fere aequans ; sutura impressa, marginata ; 

 apertura ovata, margine dextro sub-incrassatulo, columellari sub-reflexo, plica parva 

 inconspicua ascendente munito. Alt. 8 ; diam. 3 '5 mill. 



Plate XL fig. 10. 



Variable in colour, shading from brown to a hyaline tint ; adult specimens lose 

 their gloss and become of a straw-yellow. The columellar plait is small and incon- 

 spicuous. 



Hab. Molokai, Kalamaula, and at 4000 feet (Perkins). 



(23) Leptachatina exilis Gulick. 



Achatinella exilis Gulick, Ann. Lye. New York, vi. (1S56), p. 188, pi. vi. fig. 16 



[bad]; Sykes, P. Malac. Soc. London, in. pi. xiv. fig. 18. 

 Leptachatina cylindrata Pease, J. Conchyl. xvii. (1869), p. 168; P. Zool. Soc. 



London, 1869, p. 650 (nom. sol.). 

 Remarkable though the distribution may be, I am unable, after a comparison of 

 Gulick's type with specimens of L. cylindrata presented by Pease to the British 

 Museum, to sever these two species. 



Hab. Oahu, Keawaawa (Gulick).— Kauai (Pease) ; at 4000 feet (Perkins). 



47—2 



