106 THE NAUTILUS. 



LAND SHELLS FKOM VARADERO (CARDENAS) CUBA. 



BY JOHN B. HENDERSON. 



Varadero is a little settlement of winter cottages planted in 

 the sands of a long narrow peninsula that encloses the Bay of 

 Cardenas. There is a core of pleistocene coral rock more or 

 less densely covered with scrub growth with many cacti as a 

 feature. Besides this there is only the beach sand on the one 

 side and mangrove swamps on the other making altogether a 

 most uninviting field for land-shelling. The following list 

 represents only a few hours collecting but is probably almost a 

 complete census of the region. 

 Oleacina solidula Pfr. Cerion sagraianuni Pfr. 



subulataPfr. " hologlyptum 



Obeliscus homalogyra Shuttl Pils. 



Varicella (Pich. ) gracillima Pfr. Liguus fasciatus Mull. 

 Thysanophora selenina Gould Guppya gundlachi Pfr. 



' ' boothiana Pfr. Pupoides marginatas Say 



Volvidens tichostoma Pfr. Bifidaria sp. 



Cepolis cubensis penicillata Chondropoma pictum Pfr. 



Urocoptis poeyana variegata Pfr. dentatum Say 



" garceana Presas (var) Alcadia hispida Pfr. 

 Macroceramus gundlachi Pfr. Eutrochatella rupestris Pfr. 



Microcerarnus gossei Pfr. 



u denticulatus Gundl. 



STUDIES IN NAJADES. 



BY DR. A. E. ORTMANN. 



LASTENA LATA (Rafinesque). 



Simpson, Pr. U. S. Mus. 22. 1900 p. 654. Descr. Cat. 1914 

 p. 453. 



I have collected a number of specimens in Clinch River, at 

 Cleveland, Russel Co., Va., and at St. Paul, Wise Co., Va., 

 among them three gravid females (May 13 and 14, 1913), one 



