REPORT ON SEMI-FOSSIL LAND SHELLS FOUND 

 IN THE HAMAKUA DISTRICT, HAWAII. 



Bv C. F. ANCIiY. 



(Plate V.) 



Thk shells listed in the following pages were discovered at a place called 

 Palihoukapapa, on the Hamakua slope of MaunaKea, Kawaii, at an eleva- 

 tion of 4,000 feet. Professor Henshaw has kindly sent me some dirt in 

 which the minute species were found. He reports other similar localities on 

 the same island " where there are extensive deposits of fossilised land shells 

 about a foot below the surface of humus. Nearly all the known genera of 

 Hawaiian land shells are represented in these deposits by species, some still 

 extant, others probably now extinct." 



I— Pseudohyalinia meniscus, n.sp. 



PL V, figs. 9, 10. 



Testa perdepressa, tenuissima, emortua alba, baud nitens, lalissime umbilicata, 

 sub lente striis obliquis incrementi, parum profundis, confertim exarata ; 

 spira leviter convexa vel fere plana, anfractus 3),, regulariter sed subceleriter 

 crescentes, convexi, sutura impressa, ultimus depressus, soepe ad aperturam 

 leniter defle.xus, infra concavus, umbilico tertiam partem diametri superante, 

 apertura obliqua, transverse oblonga, parum lunata, margine supero antice 

 convexi prodeunte ; peristoma simplex, rectum, ad columellam baud 

 dilatatum. 



Diarn. maj. 15, min. I3 ; alt. | millim. 



A more depressed shell than P. l-auaiensis, Pft., more distinctly 

 sculptured and with a much larger umbilicus. It may be referable to 

 Charopa rather than Pseudohyalinia. 



2— Vitpea hawaiiensis, n.sp. 



Differt a V. nuAokaiensi, Sykes, et a V. lanaiensi, Sykes, testa magis elevata, 

 anfractibus altius convolutis et umbilico minore ,; a V. paiwillo, Gould, cui 

 peraffinis differt etiam testa minus depressa, paulo convexiore, colore luteo- 

 virescente, umbilico profundiore, circulari. 

 Uiam. maj. 4^, min. 3I; alt. 2i millim. 



The above description is from recent specimens found on Olaa, Hawaii, 

 by Mr. Thaanum. A single specimen from Palihoukapapa is referable to 

 his species. 



