A]!TCET : KOJJ-MAEINE HAWAIIAN MOLLTJSCA. 269 



parum profunda disci'eti, regulariter crescentes, ultimus carina superne 

 acuta et alia infra obtusiore circa umbilicum praeditus, hand deflexus, 

 superne subdeclivis, infra carinam majorem inverse conicus, planatus. 

 Umbilicus acetabulif ormis, conicus ; apertura fere recta, securiformis, 

 ad dextram acute ad basin obtusius angulata, prorsus edentula. 

 Peristoma simplex, rectum, marginibus remotis. Diam. maj. 4'33, 

 min. 3"75 mm. ; alt. 2*2 mm. 



Hah. — Waianae Mountains, Oahu (Baldwin). 



A singular little species, shaped like Eiidodonta fabrefacta, Pease, of 

 Raiatea, Society Islands, and quite unlike any other species from 

 the Hawaiian Islands, except P. digono phones, Ancey, also of Oahu. 

 The latter, however, is darker, and has a planulate spire, 



4. Thaanujiia omphalodes, n. gen. et sp. PI. XII, Pig. 8. 



Testa aperte umbilicata, ovato-conica, parum nitens, subsericiua, 

 tenuis, acute et irregulariter per longitudinem testse costulata, costulis 

 sublamellosis, leviter flexuosis, intense rufo-cornea, peristomate dilute 

 purpureo. Spira regulariter conica, ambitu rectilinearis, apice 

 subobtusa. Anfractus 6, convexi, regulariter crescentes, sutura 

 impressa divisi, embryonales minutissime spiraliter sculpti, sequentes 

 costulati, interstitiis irregulariter striatuli, ultimus initio subangulatus, 

 ovatus, dilatatus, ad finem minute breviterque subascendens, circa 

 umbilicum angulatus et compi'essus. Apertura recta, basi recedens, 

 irregulariter ovalis, utrinque angustata. Columella recte descendens, 

 longa, angulo obtuso basi juncta, basi intus leviter contorto-plicata. 

 Peristoma undique expansiusculum, ad columellam magis dilatatum, 

 marginibus baud conniventibus. Long. 6'33, lat. 3'5 mm. ; alt, apert, 

 2'66 mm. 



Sab. — Waianae Mountains, Oahu (Baldwin). 



Four specimens were found. This very beautiful and striking 

 species is provisionally located in the family Achatinellidae, though 

 the sculpture of the apex is unlike that of any other genus of the 

 group. Since it could not be placed satisfactoiily in any known 

 genus, I venture to propose Thaanumia for its reception. It is well 

 characterized by its peculiar shape, resembling Buliminus Hartwigi 

 of the Azores, deep circular umbilicus, thin shell, form of aperture, 

 small basal pillar fold and sculpture, not to speak of the very peculiar 

 striation of the nepionic whorls. It cannot be located in Leptachatina, 

 to which I had formerly referred it. 



5. Amastra Feosti, Ancey, var. unicolob,, n.var. PI, XII, Fig. 11, 



Testa forma typo similis, sed unicolor stramineo-flavescens, fasciis 

 fuscis omnino destituta. 

 Sab. — "Waianae Mountains, Oahu (Baldwin and others), 



6. Amastea simulaeis, Hartman. 



Amastra simularis, Hartman : Proc. Ac, Nat, Sci, Philad., 1888, 

 p, 252, pi. xiii, fig. 7. 



