Notes on certain Terrestrial Mollusca. 



161 



Fig. 4. 



The forms of the central plate and laterals of C. seceva 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 scasva Gund. 



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. 



C. seceva 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. 

 Gongylostorna " 

 Holospira " 



Trachelia Pfr. 

 Diaphora Albers. 

 Scalatella " 

 Casta " 



Cylindrella. 

 Type C. decollata Nyst. 

 " C. subula Fer. 

 " C. elegans Pfr. 

 " C. pilocerei Pfr. 

 " C. porrecta Gould. 

 " C. Cuuiingiana Pfr. 

 " C. Greyana C. B. Ad* 

 " C. Chemnitziana Fer. (elongata Chera.) 



Macroceramus. 

 Macroceramus Guild. Type M. signatus Guild. 

 Anonia Albers. " M. tricolor Pfr. 



Lia. * " M. Maugeri Wood. 



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

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

 Truncatella. 



