42 THE NAUTILUS. 
Strigilla flecuosa (Say). Much like S. pistformis; has not 
the red coloring of that species. 
Macoma constricta (Brug.). 
Donaz striata (Linn.). 
Donaz striata mediamericana (Pilsbry). A small form of 
striata. Dead shells were more numerous than the live ones, 
or so appeared. 
Tivela mactroides (Born). The most common species on 
the beach; no live ones seen and both valves together were 
very scarce. . 
Cyrena solida Phil. Plentiful in Rio Dulce, most mature 
ones badly eroded. 
Cyrenoidea guatemalensis Pilsbry. In 1914 one specimen 
taken near the mouth of Cavech river. 
Mytilus exustus (Linn.). In masses on rocks and drift 
logs and under the bluff of the projecting point of land, 
mostly immature. 
Mytilopsis sallei (Recluz). Often with M. exustus. 
Across THE Rio DuLcE FROM LivINGsToN, on the first moun- 
tain or foothill, is Rio Blanco, a small stream in which were 
found : 
Nephronaias calamitarum (Morelet). 
Pachycheilus pyramidalis (Morelet). Mostly immature. 
Pachycheilus indiorum (Morelet). 
Pachycheilus corvinus (Morelet) and the color variety 
lutescens C. & F. 
Helicina rostrata Morelet. On top of the hill one broken, 
nearly fresh specimen was found. The writer has three speci- 
men received from Thomas Bland many years ago. 
A short distance west of Livingston were found: 
Aperostoma dysom (Pfr.). 
Amphicyclotus bisinuatus (Martens). Dead specimens. 
Chondropoma rubicundum (Morelet). Searee. 
Subulina octona (Chem.). Very plentiful by the side of 
side streets and paths among decaying vegetation and filth; 
also found on the hillside in front of the hotel, with Lepti- 
narus livingstonensis. 
Oxystyla princeps (Brod.). Bones only. 
Se ee ee eee 
