4 LEPTACHATINA. 



II. Embryonic whorls spirally striate. 



Subgenus THAANUMIA, species 107-114. 

 III. Embryonic whorls transversely costate or striate. 



Subgenus ILIKALA, species 115-117. 



Distribution of species. 

 KAUAI. 



Group A : acuminata, cuneata, antiqua, laevis. 



B : knudseni. 



E : cylindrata. 



F : brevicula. 



J: pachystoma. 



M: fossilis. 



N: lucida, striata. 



: attenuata, gayi, tenebrosa, leucochila, costulosa, 



pupoidea, extensa, striatula, balteata, 

 Thaanumia: perforata. 

 Ilikala: fraterna, 



OAHU. 



Group B : sandwicensis, stiria, illimis, scutilis. 



C : cerealis, obtusa ? teres, turrita, persubtilis. 



D : gracilis, subula, terebralis. 



E : convexiuscula, exilis, saxatilis, leiahiensis, exop- 

 tabilis. 



F : accincta, crystallina, gummea, oryza, vana, capi- 

 tosa, pulchra, ovipara. 



G: fumida. 



H : glutinosa, dimidiata, pyramis. 



K : cingula, ventulus, approximans, pilsbryi. 



L : corneola, marginata, resinula, succincta, saccula ? 



N : costulata, octogyrata, sculpta, semicostata. 

 Labiella: labiata, callosa, lagena. 

 Pauahia: artata. tantilla, chrysallis. 

 Thaanumia : omphalodes, optabilis, fuscula. 

 Ilikala: fusca, petila. 



