hee NAUTILUS: 
Vol. XXXIV OCTOBER, 1920. No. 2 
GUATEMALA MOLLUSCA. 
BY A. A. HINKLEY. 
This list is the result of three vacation trips. For the de- 
terminations I am indebted to Dr. H. A. Pilsbry, Dr. Bryant 
Walker, Dr. V. Sterki, Dr. Wm. H. Dall and others of the 
National Museum and Prof. F. C. Baker of the Illinois Uni- 
versity. 
For accommodations and personal comfort much is due to 
the kindness of Mr. Landry, Supt. of the United Fruit Com- 
panies’ plantations at Quirigua. To Mrs. Lucie Potts, Pro- 
prietress of the Jocolo plantation. To Mr. and Mrs. Robert 
Hempstead of the Chejel and Chama coffee plantations and 
to others for their various acts of kindness. The list is ar- 
ranged by localities. 
Lake AMATITLAN is some 20 miles south of Guatemala 
City; it is two lakes connected by a short strait across which 
the railroad embankment has been built. Laguna Station is 
on the south or southwest of the lake, just across the strait. 
Pachycheilus lacustris (Morelet) is plentiful in the shallow 
water of the lake. The largest were found among rushes 
some 40 feet from a hot spring. Ege masses of this mollusk 
were numerous, much like those of Physa but larger. The 
fresh masses were clear, changing to yellowish as the young 
were about to emerge. Some were seen breaking through. 
Ammicola guatemalensis Walker. Taken near the edge of 
the water or on driftwood and pumice. Another species of 
Ammcola was taken with the above. 
