126 PEOCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



Ltkopupa Magdalene, Anc. 



Hah. — Palama, Oahu (Baldwin). Also young examples from the 

 Waianae Mountains, Oahu, and from Honolua, Maui, may belong there. 



Lyropfpa mirabilis, Anc. PL VII, Fig. 18. 



Hah. — Waianae Mountains, Oahu (Baldwin) ; Waimea, Hawaii 

 (Prof. H. W. Henshaw), subfossil. 



Ltkopupa microthatjma, n.sp. PI. YII, Fig. 20. 



Testa praecedente minor et minus cylindracea, scilicet magis conoideo- 

 oblonga ; anfractibus 5, margine supero externe minus producto, lamella 

 angulari magis elongata et distincta, palatali supera elongata, prope 

 marginem exterum subabrupte truncata, infera magis elongata, hand 

 guttiformi, prsecedenti hand omnino parallela, sed paulatim antrorsum 

 divergente prteterea differt. 



Long, rs, lat. 1, long, apert. '660110. 



Mah. — In valle Nuuanu, ins. Oahu (Thaanum). 



The smallest of the group. 



Ltropupa striatula (Pease). 



Insufficiently characterized, but probably distinct from lyrata. 

 Hah. — Hawaii (Pease). 



Lyropupa perlonga, Pease. PL VII, Fig. 15. 



Hah. — Oahu (Pease) ; Kauai (Perkins) ; an extinct crater of the 

 Kona coast, Hawaii (Baldwin) ; Waimea district, Hawaii (Professor 

 Henshaw). 



The specimens from Hawaii were all dead and subfossil, though 

 some are in good condition. As I have no specimens from Oahu for 

 comparison, their identification is somewhat doubtful, but tbey agree 

 fairly well with Pease's shell. 



BiFiDAEiA Lyonsiana, Anc. 



Jj;ah. — Punahou, Oahu (Lyons), also "Waianae Mountains, Oahu 

 (Baldwin) ; Lahaina, Maui (Baldwin). 



BiFIDAEIA PEDIOTJLTJS, Shutt., Tar. NACCA, Gld. 



JIah. — Punahou, near Honolulu, Oahu (Baldwin) j Hawaii (Gould) ; 

 Waipio vaUey, Hawaii (D. Thaanum). 



Helicina Baldwini, n.sp. PL VII, Fig. 24. 



Testa conoideo-lenticularis, solidula, subnitidula, sub epidermide 

 tenui lutescente vel ochracea sordide alba, vertice rubello vel luteo, 

 lineis incrementi tenuibus sub lente sculpta, et stria unica parum 

 impressa supra angulum medianum sita et suturam sequente exarata. 

 Spira conoideo-depressa, vertice minuto. Anfi-actus fere 5, planulati, 

 superiores subexserti, ultimus ad peripheriam biangulatus, angulo 



