502 PROCEEDINGS OF THE ACADEMY OF [Aug., 



LAND MOLLUSCA OF THE PANAMA CANAL ZONE. 

 BY H. A. PILSBRY. 



The land .shells listed below were collected by Dr. A. P. Brown 

 during a visit to the Canal Zone in April of this year. Twenty-two 

 species were taken, but this is probably not half of the fauna of the 

 Zone, since other interests left but little time for collecting snails, 

 and the condition — dense jungle with only small expostires of cal- 

 careous rock — made collecting rather slow work. 



Notes on a few species from other sources are appended. 



Prof, von Martens has reported 20 species of land shells from Panama, 

 on the authority of various authors. The following species from his 

 list are additional to those taken by Dr. Brown: 



Aperostoma giganteum. Drymaus panamensis. 



Helicina amcena. Subulinn octona. 



Euglandina sowerbyan . Leptinaria inter str iota . 



DrymcBUS bugabejisis. " MelanieUa" fimbriata. 

 Drymaus alter )tans. 



HELICID^}. 

 Pleurodonte (Labyrinthus) otis orthorhinus Pils. Tabernillo. 



Several other races of P. otis, and P. uncigcra are found on the 

 Isthmus. See below. 



Tb.ysanopb.ora conspurcatella (Morel.). Las Cascades. 



The specimens are somewhat larger than the typical form from 

 Mexico. Some shells of practically typical T. conspurcatella are in 

 the collection of the Academy under the name Helix panamensis 

 Perez. So far as I can learn no description under this name has been 

 published. They are from the Morelet collection. 



Tbysanophora canalis Kls. Las Cascades. 



ACHATINID^. 

 Leptinaria lamellate concentrica Reeve. Tabernillo. 

 Leptinaria filocostata (Strebel) (?). Tabernillo ; Las Cascades. 

 Leptinaria sp. undet. Las Cascades. 

 Leptinaria panamensis Pils. Tabernillo. 

 Opeas beckianum (Pfr.). Tabernillo. 



