50 THE NAUTILUS. 
Trichodiscina sargi (Crosse & Fischer). One specimen found 
in a damp, shaded place at the base of a rock bank near the 
above rill. This appeared to be an ideal place for mollusks, 
but a half-hour’s search produced nothing more. 
Drymaeus castus (Pfr.). On the road to Puruhla one fair 
specimen a little broken and other fragments evidently dropped 
by birds were all noticed. 
Streptostyla nigricans (Pfr.). One immature specimen. 
Nothing was found from Puruhla to Tactic. 
Tactic. Half way between Pancojchl and Coban. 
Pachychilus corvinus (Morelet). Plentiful in two creeks, one 
north of town and the other in the south edge of the town. 
Physa sp. A few quite young noticed in a pool by the road 
to Coban. 
On the road between Coban and Chama. 
Euglandina decussata (Desh. ). A larger form than those found 
nearer the coast; dead specimens only. 
Pseudosubulina mitescens Martens. 
Epirobia polygyrella (Martens). On rock faces exposed to the 
north. 
Eucalodium decollatum (Nyst.). A subspecies. Dr. Pilsbry 
says ‘‘I have never seen this form before.’’? One dead speci- 
men. There were also specimens a little smaller and thinner 
than the above covered with fine oblique striae extending from 
suture to suture. 
Amphicyclotus boucardi (Pfr.). 
Pachychilus graphium (Morelet) var. transcendens C. & F. 
Picked up by the road; probably dropped or thrown aside by 
some one. 
Cuama, State of Alta Verapaz. This plantation of coffee, 
cacao and rubber is in the mountains near Rio Tsalbha and 
probably half a mile or more from Rio Negro. It is about 900 
feet above the sea and the river is 50 ft. lower. 
Ampullaria lattrei chamana n. subsp. Four live specimens 
were brought to the writer by an Indian. 
Pachychilus pyramidalis (Morelet). Some distance up Tsalbha 
River from Chama. 
