82 Dentition of Pulmonale Mollusks. 



Glandina solidula, Pfr. (Oleacina.) New Providence. 



Lingual membrane as usual in the genus. 



Glandina ATbersi, Pfr. Lower California. 



In L. and Fr. W. Sh. of N. A., I, 19, is a figure of the dentition of this 

 species, drawn by Mr. E. S. Morse. There are 32-1-32 teeth. 



Oonospira. 



Mauritius. Consul Pike. 



There are no laterals. The central tooth has a short, blunt, rounded cut- 

 ting-point. The marginals increase at first very rapidly in size. 



G. palanga, Fer. Teeth, 37-1-37. (PI. XVII, fig. F.) A pho- 

 tograph of this membrane will be found in Am. Jotirn. Conch., 

 V, 37. 



G. Newtoni, H. Ad. Teeth, 6-1-6. (PI. XVII, fig. G.) 



G. Mauritiana, Morel. Teeth, 12-1-12. (PL XVII, fig. H.) 



G. modiolus, Fer. Teeth, 25 1-25. 



G. Nevillei, H. Ad. Teeth, 21-1-21. (PL XVII, fig. I.) 



G. sulcata, Mull. Lingual membrane as in the other species 

 examined. 



E n iiea. 



Ennea clavatula, Lam. Mauritius. PL XVII, fig. J. Consul 

 Pike. 

 Lingual membrane as in Gonospira. 



§piraxi§. 



Spiraxis Dunkeri, Pfr. San Domingo. Mr. J. S. Gibbons. 



The membrane (pi. XVII, fig. K) has no central or lateral teeth. Those 

 present are all marginals, of the form common in Glandina, and arranged en 

 chevron. The figure gives three on each side of the centre of the membrane. 



Rliytida. 



Rhytida vernicosa, Krauss. Cape Town, South Africa. 



This genus also, has no central or lateral teeth. The marginals are 

 arranged as in Glandina. PI. XVII, fig. L, gives the whole of one half of 

 one transverse row of teeth. The formula is 14-0-14. The rows of teeth 

 are close together, not separated. 



The species cannot be retained in Pella, a sub-genus of Helix, 

 where Von Martens placed it. 



