304 LAND ANB FRESII--\VATEU SHELLS OF N. A. [PART L 



truding at the base of the right tentacle ; the female opening 

 about the middle of the right side. Mucus pore 

 Fig. 539. none. 



Shell none. 



Jaw slightly arcuate, long, narrow, with numerous 

 ribs, margin pectinated. 



Lingual ribbon (of V. fioridana) very broad 

 (48 — 1 — 48). Central teeth very small, triangularly -conical, 

 acute ; first twenty-nine laterals uniform, but decreasing in size 

 as they pass ofif laterally, conical, acute, the base with a narrow 



Lingual deutition of Veronicella florUlana. 



lateral extension ; the next fourteen comprised of a more obtuse 

 denticle rising obliquely from the centre of the plate to which 

 they are attached, without lateral extension ; the balance becom- 

 ing in form and size very much modified as they approach the 

 margin. 



There are but few known species of this genus, found in South 

 America, the Philippines, South Africa, and the West Indies. 

 Our single Florida species belongs rather to the fauna of SoutJi 

 than North America. 



The name Vaginula, sometimes used for the genus, was pub- 

 lished several years after Veronicella. 



The anatomy of Veronicella is given in vol. 1 of Terrestrial 

 Mollusks U. S. 



The contractility of the animal is vcr}^ great. When extended 

 it is very long and slender, and smooth or* faintly reticulated, 

 three or four times as long as when contracted ; in which latter 

 state it has an oblong form, equally rounded at both ends, and 

 its surface is coarsely wrinkled, granular or tuberculated. The 



