MOLLUSC A 357 



(2) Leptachatina acuminata Gould. 



Ackatinella amininata Gould, P. Boston Soc. 11. (1847), P- 200; U. S. Explor. 

 Exped. Mollusca, pi. vii. fig. 100. 



Plate XII. figs. 13, 13 a. 



The type of the genus ; the radula is figured from a dissection by Lt.-Col. H. H. 

 Godwin-Austen, F.R.S. 



Hab. Kauai (Gould); Hanalei (Baldwin); Kaholuamano (Perkins). 



(3) Leptachatina antiqua Pease. 



Leptachatina antiqua Pease, P. Zool. Soc. London, 1869, p. 651 (nom. sol.); 

 J. Conchyl. xviii. (1870), p. 94 ; Crosse, J. Conchyl. xxiv. p. 98, pi. iii. fig. 6. 

 Leptachatina antiqtiata Pease, J. Conchyl. xviii. (1870), p. 87 [err. typ.]. 



Hab. Kauai (Pease) ; Mana (Baldwin). 



(4) Leptachatina approxinians Ancey. 



Leptachatina approxinians Ancey, Naturaliste, 1897, P- 222. 

 Hab. Waianae, Oahu (Ancey). 



(5) Leptachatina arborea, n. sp. 



Testa ovato-oblonga, turrita, tenuis vel tenuiuscula, dextrorsa, cornea, longitudina- 

 liter levissime striatula ; anfr. 6 — 7, plano-convexi, ultimus ^ altitudinis testae 

 aequans ; sutura bene impressa ; apertura quadrato-ovata, margine dextro subincras- 

 satulo, columellari verticali, incrassato, reflexo, plica parva vix conspicua niunito. 

 Alt. 8; diam. 3-6 mill. Plate XI. fig. 21. 



The plica is very inconspicuous; the colour becomes lighter in adult specimens, and 

 then the polished, transparent gloss disappears and the shell becomes of a straw colour. 

 Over thirty specimens were collected by Mr Perkins ; they vary slightly in shape, a 

 few being broader in proportion to the length, and having more inflated whorls. 

 J\Ir Baldwin sends me the following note : " It is found on the Candle-nut tree 

 {Aleurites niohiccana), among the leaves of the Bird-nest fern [Asp/cniutn nidus), some- 

 times at a height of 30 or 40 feet. All the other known species of Leptachatina are 

 terrestrial — under rocks or on dead leaves and decaying wood." 



Hab. Hawaii, Kona at 4000 feet (Perkins); Olaa, Hilo (Baldwin). 



