Notes on certain Terrestrial Mollusca, 



161 



Fig. 4. 



The forms of the central plate and laterals of G. smva Gund, of 

 Cuba, obtained from a living example 

 received from Mr. Charles Wright, are 

 shown in the annexed figure, which, with 

 several others illustrating this paper, I use 

 with the kind permission of Professor 

 Henry of the Smithsonian Institution, in 

 anticipation of a forthcoming work pre- 

 pared for the Institution by W. G. Bin- 



Lingual Dentition of 

 Cylindrella scaeva GtincL 



ney. 



The rows are about 130 in number, the 

 formula being 26-1-26. The central plate is small, obtusely 

 pointed, laterals uncinated, joined two by two, upper edge 

 fringed. 



O. sccBva belongs to the subgenus Urocoptis. 



The classification by Albers {Die Heliceen^ 1861) of Cylin- 

 drella and Macroceramus, may here be added for convenient 

 reference, but I do not desire it to be implied that I adopt his 



views : 



Urocoptis Beck. 

 Mychostoma Albers. 

 Gongylostoma " 

 Holospira " 



Tracheha Pfr. 

 Diapbora Albers. 

 Scalatella " 

 Casta " 



Macroceramus Guild. 

 Anoma Albers. 

 Lia. 



CylindreIla. 

 Type C. decollata Nyst, 

 " C. subuia Fer. 

 " C. elegans Pfr. 

 " C. pilocerei Pfr. 

 " C. porrecta Gould. 

 " C. Oiimingiana Pfr. 

 " C. Greyaua C. B. Ad.* 

 " C. Chemnitziana Fer. (elongata Chem. 



Macroceramus. 

 Type M. signatus Guild. 



" M. tricolor Pfr. 



" M. Maugeri Wood. 



* C. B. Adams described this originally as a Cylindrella, subsequently as a 

 Geomelania, finding it to be operculated. Pfeiffer {Mon. iii., 1865) has it in 

 Truncatella. 



