338 Lingual Dentition and Anatomy of 



(c) in its natural position lies as iu flg. 5, directly under the respiratory 

 cavity, over the other genital organs. The genital bladder (c?) was found 

 almost embedded in the ovary. 



IVmaiiia ClBaiutiisoi, Ffr. 



With the AchatinellfB were specimens of a si|iall Nanina 

 from Oahii and another species from West Maui. The latter 

 is pjouounced by Dr. Newcomb to be young of the above 

 named species. Both of these species have similar lingual 

 teeth. Those of the West iNIaui species are figured in pi. 

 XV, fig. 3. The centrals and laterals are as usual in the 

 genus ; there are ten perfect laterals. The marginals are 

 aculeate, but instead of the usual simply bifid point, they 

 have three and four points. The tooth figured was the very 

 last oil the edge of the membrane. No perfect jaw was 

 obtained in either species, though a simple arcuate smooth 

 jaw was recognized in that from Oahu, of too extreme deli- 

 cacy to be satisfactorily studied. 



The species belongs to the subgenus Microcystis. 



fiiBCciiBeii eanelSift, Gkl. 



From West Maui also was this species of Succinea, whose 

 jaw and lingual membrane are as usual in the genus. 



Zonites OimcllaclBi, Th-.* 



Mr. A. Schramm, Guadeloupe. The species is also found 

 in Florida and several of the W. I. Islands. 



Jaw not examined. ^ 



Lingual memlirane arranged as usual in the genus. Centrals tricuspid, 

 laterals bicuspid, about seven of the latter being perfectly shaped laterals. 

 Marginal teeth aculeate, of the form usual in the genus, but bifld, and 

 sometimes trifld (see pi. xv, fig. 1). The species is viviparous. 



*Thi8 species, like Z. fulims{h. & F.W. Sliells N. A., I, 47, fig-. 75), differs from Zonites 

 in the bifurcation of the marginal teeth of its lingual membrane. It must be compared 

 to Vitrinocomis, Semper, Phil. Arch., p. 91. 



Stetwpus has teeth arranged as in Glandina, with no laterals. Our species cannot 

 therefore belong to it. 



