WEST AFRICAN SNAILS OF THE FAMILY ACHATINIDAE 

 IN THE UNITED STATES NATIONAL MUSEUM 



By Henry A. Pilsbry 



Academy of Natural Sciences of Philadelphia 



The land moUusks herein described were found in the course of 

 a review of West African mollusks in the United States National 

 Museum. The most interesting item perhaps is the snail described 

 as Achat ina turhinata Lea, the type specimen of which turns out to 

 be a species of the genus Pseudotrochiis. Though described over 

 90 years ago, it has not been illustrated hitherto, and never subse- 

 quently recognized. Later authors supposed Lea's shell to be a 

 Limicolaria, and a very different species of that genus has been 

 mistaken for it. RoUa P. Currie rediscovered this long-forgotten 

 snail at Mount Coffee, Liberia. 



Other snails now described were taken by the Collins-Garner 

 French Congo expedition of 1918 in the Gaboon Colony, and by 

 Rolla P. Currie, of the United States Bureau of Entomology, in 

 Liberia. Mr. Currie, then aid in the division of insects of the Na- 

 tional Museum, accompanied Dr. O. F. Cook, the well-known author- 

 ity on Myriapoda, who visited Liberia as agent of the New York 

 Colonization Society in the spring of 1897. He made valuable col- 

 lections at Mount Coffee, on the St. Paul River about 7 miles inland 

 from the Muhlenburg Mission and 25 to 30 miles from Monrovia. 



Genus ARCHACHATINA Albers 



ARCHACHATINA GABOONENSIS. new species 



Plate 1, Figures 3, 4 



Type.—V.^.'^M. No. 336168, collected by Aschemeier, Collins- 

 Garner French Congo expedition, at Agouma, Rem Nkami, Gaboon 

 Colony, French Congo. 



Deso%ption. — The shell is solid, oblong-conic, with broad, rounded 

 summit. Surface glossy; bright apricot-yellow with bold stripes of 

 chestnut-brown, which on the last whorl are widest in the middle, 

 irregular or weakly zigzag, and taper or are forked near the suture; 

 on the penultimate whorl they are generally more zigzag or oblique. 

 The summit is dull reddish. Sculpture of fine, irregular striae cut 



No. 2960.— Proceedings U. S. National Museum, Vol. 82, Art. 19 



157645 — 33 1 



