THE NAUTILUS. 39 
Levapex excentricus (Morelet). 
Amnicola cisternina (Walker). 
Amunicola hinkleyt (Walker). 
Potamopyrgus coronatus (Pfr.). 
Pisidium sp.? ‘‘They appear to be of the same group with 
a Pisidium from Chili, that is closely related to Pisidiuwm 
sterkianum from Uruguay; same shape and appearance, but 
somewhat smaller.’’ 
Pseudohyalina maya Pils. 
Thysanophora dioscoricola (C. B. Adams)? One poor 
specimen taken from the washings when collecting the Am- 
nicola. 
Maya Farm, Quiricua, 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 micra (Orb.). One specimen. 
Cecilioides consobrina veracruzensis (Crosse and Fischer). 
Leptinaria guatemalensts Crosse and Fischer. 
Euglandina decussata (Desh.). About old logs, under 
loose bark and other vegetation. A fine species. 
Guppya elegantula Pilsbry. 
Guppya grundlachi (Pfr.). 
Zonttoides minusculus (Binney). 
Zontoides elegantula (Pfr.). Under chips. 
Ammoniceras stolli (Martens). Under chips. Only one 
specimen, rare. 
Leptinaria livingstonensis Hinkley. 
