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 mitescem Martens. 



Epirobia polygyrella (Martens). On rock faces exposed to the 

 north. 



Eucalodium decoUalum (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. 



Amphicydotus boucardi (Pfr.). 



Pachychilus graphium (Morelet) var. transcendens C. & F. 

 Picked up by the road; probably dropped or thrown aside by 

 some one. 



CHAMA, State of Alta Verapaz. This plantation of coffee, 

 cacao and rubber is in the mountains near Kio 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. 



