THE NAUTILUS. 39 



L&vapex excentricus (Morelet). 



Amnicola cisternina (Walker). 



Amnicola hinkleyi (Walker). 



Potamopyrgus coronatus (Pfr.). 



Pisidium sp.? "They appear to be of the same group with 

 a Pisidium from Chili, that is closely related to Pisidium 

 sterkianum from Uruguay ; same shape and appearance, but 

 somewhat smaller. ' ' 



Pseudofayalina may a Pils. 



Thysanophora dioscoricola (C. B. Adams) 1 One poor 

 specimen taken from the washings when collecting the Am- 

 nicola. 



MAYA FARM, QUIRIGUA, a short distance from the Farm 

 Overseer's quarters, are the interesting "Quirigua Ruins", 

 a good description of which appeared in the National Geo- 

 graphic Magazine some years ago. On this farm were found : 



Aperostoma dysoni (Pfeiffer). 



Helicina amoena Pfeiffer. Under and about decaying 

 vegetation. 



Helicina flavida Mke. or trossula (Morel. The identity of 

 the original H. flavida seems to be in doubt. 



Thysanophora plagioptycha (Shutt.). One specimen. 



Oxystyla princeps (Brod.). Two live ones taken from 

 banana plants ; dead ones scarce. 



Gastrocopta pentodon (Say). Under chips, scarce. 



Opeas beckianum (Pfr.). 



Opeas micro, (Orb.). One specimen. 



Ccccilioides consobrina veracruzensis (Crosse and Fischer). 



Leptinaria gu-atemalensis Crosse and Fischer. 



Euglandina decussata (Desh.). About old logs, under 

 loose bark and other vegetation. A fine species. 



Guppya elegantula Pilsbry. 



Guppya grundlachi (Pfr.). 



Zonit aides minusculus (Binney). 



Zonitoides elegantula (Pfr.). Under chips. 



Ammoniceras stolli (Martens). Under chips. Only one 

 specimen, rare. 



Leptinaria living stonensls Hinkley. 



