44 THE NAUTILUS. 



Subulina octona (Chem.). A mile or more back of the vil- 

 lage, by a well-traveled path. 



Pseudosubulina martensiana Pilsbry. 



Leptinaria guatemalensis Crosse and Fischer. 



Leptinaria livingstonensis Hinkley. 



Spiraxis livingstonensis Pilsbry. 



Spiraxis longior Pilsbry. 



Brachypodella subtilis piilchella (Martens). Of the same 

 color as the limestone on which they live, they are inconspic- 

 uous. The shell hangs parallel with the face of the rock or 

 stands out at an angle. 



Bothriopupa breviconus Pilsbry. One specimen. 



C&cilioides consobrina veracruzensis (C. & F.). 



Helicina amoena Pfr. 



Helicina flavida Mke. or H. trossula Morelet. 



Helicina coccinostoma Morelet. 



Cistula radiosum (Morelet). Found on limestone and dead 

 wood, sometimes hanging by a thread. Some were in motion, 

 but the larger part were attached to the rock or wood of 

 similar color. 



Chondropoma rubicundum (Morelet). Situated above fal- 

 len trees, base of rocks and under old banana leaves. Some 

 variation in size. 



Pachychilus indiorum (Morelet). Cavech river. This 

 species prefers shallow water. The finest specimens were on 

 a hillside in thick timber where the water spreads out thin 

 over a flat rock surface marked with irregular seams and de- 

 pressions ; many of these mollusks were barely wet, hundreds 

 of the shells with a mottled and polished surface showing 

 through a thin film of water made an attractive sight to any 

 one interested in the beautiful of Nature. 



Pachychilus corvinus (Morelet). This mollusk prefers 

 more water than the above. At this locality there is more 

 color variation, from a dark purple to the almost white form 

 known as variety lutescens. 



Pachychilus largilierti (Philippi). In a small stream, al- 

 most dry, they had collected by the thousands, in small pools, 

 many dead and the rest dying. Nearly all were immature. 

 A few of the largest were taken. 



