1912.] 



NATURAL SCIENCES OF PHILADELPHIA. 



445 



A NEW SPECIES OF VERTIGO FROM FLORIDA. 



BY E. G. VANATTA. 



Vertigo hebardi n. sp. 



Shell umbilicate; rather short; oval; very small, fragile, 

 corneous; whorls 3|, convex, the first smooth, penultimate irregu- 

 larly striate, body whorl with a few growth striae. Aperture semi- 

 ovate, provided with 5 teeth, parietal lamella very high and long, 



angular much lower and shorter than parietal, 

 columellar very strong and directed downward, 

 the two palatals are high and short. No 

 crest behind the outer lip. 

 Alt. 1.25, diam. .84 mm. 

 This species is much smaller than V. rugosula 

 St. and does not have such long palatals; 

 it is smaller than V. oralis St. and has fewer 

 teeth, also lacks the impression on the outer lip. 



Type in the collection of the Academy of Natural Sciences -of 

 Philadelphia; Number 106,359; picked from leaf -mould collected 

 on Long Key, Florida, by Mr. Morgan Hebard. It was associated 

 with Chondropoma dentatum Say, Helicina clappi Pils., H. tantilla 

 Pils., Polygyra c. carpenteriana Bid., Thysanophora incrustata Poey, 

 T. selenina Gld., T. cceca Guppy> T. plagioptycha Shutt., Yitrea 

 dalliana 'Simps.' Pils., Varicella g. floridana Pils., Succinea floridana 

 Pils., and 19 specimens of Drymmus multilineatus Say, two of which 

 are almost entirely black. 



