48 THE NAUTILUS. 
They burrowed somewhat like a mole, and often the little mole- 
like ridge could be followed quite a distance, and the mollusk 
found working under cover. 
It is a viviparous genus. When cleaning these shells the 
embryos run from one to three to the individual. None were 
noticed with more than three. 
Planorbis caloderma Pilsbry. Only three specimens taken in 
the net with the small forms. 
Planorbis caribaeus (Orb). One small specimen with the 
above. 
Ancylus sp. Taken in the net. 
Euglandina decussata (Desh.). All dead but one. 
Euglandina monilifera (Pfr.). One alive, found in the banana 
field under dead leaves. 
Salasiella guatemalensis Pilsbry. Under leaves and trash. 
Guppya elegantula Pilsbry. Lake drift. 
Guppya gundlachi Pir. Lake drift. 
Zonitoides minusculus (Binney). Lake drift. 
Averellia hinkleyi Pilsbry. 
Thysanophora plagioptycha (Shutt.). Lake drift. 
Strobilops strebeli guatemalensis n. subsp. 
Bulimulus corneus (Sowb.). Found in a banana field under 
dead leaves. 
Drymaeus sulphureus (Pfr.). Bones. 
Oxystyla princeps (Brod). Dead. 
Opeas beckianum (Pir.). Lake drift. 
Opeas micra (Orb.). Lake drift. 
Opeas pumilum (Pfr.). Lake drift. 
Subulina octona (Chem.). 
Leptinaria guatemalensis C. & F. Lake drift. 
Leptinaria livingstonensis Hinkley. In the fields back of 
Jocolo. 
Caecilioides consobrina veracruzensis (C. & F.). Lake drift. 
Gastrocopta pentodon (Say). Lake drift. 
Succinea recisa Morelet. Banana fields. 
Aperostoma dysoni (Pfr.). Under decaying leaves in the 
banana fields. 
Amphicyclotus bisinuatus (Martens). Scarce. 
