338 Lingual Dentition and Anatomy of 



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

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

 almost embedded in the ovary. 



IVanina Cliaiuliisoi, Ffr. 



With the Achatineike were specimens of a small JSfayiina 

 from Oahu and another species from West Maui. The latter 

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

 named species. Both of these species have similar lingual 

 teeth. Those of the West Maui 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 on 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. 



Siicciiiea Citziella, Gld. 



From West Maui also was this species of Succinea, whose 

 jaw and lingual membrane are as usual in the genus. 



Zonatos C^iBiidliicIii, Ffr.'" 



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

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



Jaw not examiued. 



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

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

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

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



*This species, like Z. fulvus(L. & F.W. Sliells X. A., I, 47, flg. 75), differs from Zonites 

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

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



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

 therefore belong to it. 



