52 THE NAUTILUS. 



Macroceramus concisvs (Morelet). From the bluff. 



Opeas beckianum (Pfr. ). From the bluff. 



Pseudosubulina talvini Martens? Bluff. 



Pseudosubulina mitescens Martens. Bluff. 



Leptinaria elisae (Tristram). Bluff. 



Caecilioides consobrina veracruzensis (C. & F. ). River drift. 



Gastrocopta peniodon (Say). River drift. 



Gastrocopta pellucida (Pfr.). A variety with thickened lip. 

 River drift. 



Adelopoma stolli (Martens) . One specimen in river drift. 



Carychium mexicanum costaricanum Martens. River drift. 



Aperostoma dysoni ( Pfr. ) . In cacao grove. 



Aperostoma n. sp. On the bluff. 



Amphicydotus boucardi (Pfr.). 



Helicina omoena Pfr. Cacao grove. 



Helicina coccinostoma Morelet, variety anozona Martens. Bluff. 



Helicina tennis Pfr., var. lindeni (Pfr.), Bluff. 



Helicina frag His Morelet. Bluff. 



Schasicheila hinkleyi Pilsbry. Bluff. 



Schasicheila walkeri Hinkley. Bluff. 



Eutrochatella nicrodina (Morelet) var. chryseu (Tristram). 

 Bluff and drift. 



Tomocylus simulacrum (Morelet). Bones scattered in recesses 

 of rocks on the side of the mountain below the bluff. 



Chondropoma rubicundum (Morelet). Bluff. 



Lucidella lirata (Pfr.). Bluff and river drift. 



At the places where the writer has collected different forms of 

 slugs were often noticed. Quite a number were put in alcohol, 

 but only two or three forms of Vagimdus came through in good 

 condition. 



Descriptions of new species and subspecies. 



STROBILOPS STREBELI GUATEMALENSIS, n. subsp. 



Shell depressed, light brown, with fine costae which extend 

 over the base and into the small umbilicus; on the base the 

 costae are smaller and crossed by longitudinal microscopical 

 striae. Sutare well marked, the first one and half whorls are 



