2 THE NAUTILUS. 
Macroceramus concisus (Morelet). From the bluff. 
Opeas beckianum (Pfr.). From the bluff. 
Pseudosubulina salvini Martens? Bluff. 
Pseudosubulina mitescens Martens. Bluff. 
Leptinaria elisae (Tristram). Bluff. 
Caecilioides consobrina veracruzensis (C. & F.). River drift. 
Gastrocopta pentodon (Say). River drift. 
Gastrocopta pellucida (Pir.). 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. 
Amphicyclotus boucardi (Pfr. ). 
Helicina amoena Pfr. Cacao grove. 
Helicina coccinostoma Morelet, variety anozona Martens. Bluff. 
Helicina tenuis Pfr., var. lindeni (Pfr.), Bluff. 
Helicina fragilis Morelet. Bluff. 
Schasicheila hinkleyi Pilsbry. Bluff. 
Schasicheila walkeri Hinkley. Bluff. 
Eutrochatella nicrodina (Morelet) var. chryseis (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 Vaginulus 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. Suture well marked, the first one and half whorls are 
