THE NAUTILUS. 41 
Helicina sp. More depressed than any other Helicina 
found except H. amena. 
Lucidella lirata (Pfr.). 
Truncatella sp. Two specimens. 
Cochliopa minor Pilsbry. 
Spirula spirula (Linn.). Plentiful in 1914, scarce in 1917. 
Thais coronata var. On rocks beyond Cavech village and 
on piling and breakwater at Puerto Barrios. 
Melongena melongena (Linn.). In shallow water. Donax 
seemed a favorite food for this mollusk. 
Strombus pugilis (Linn.). A few dead ones near Cavech 
village. 
Epitonium lineatum (Say). One small specimen. 
Cecum sp. One specimen. 
Inttorina nebulosa Lam. On rocks and drift logs; common. 
Iattorina carinata Orb. Young were very numerous on 4 
perpendicular rock; many were beyond reach of the spray 
from the ordinary waves. 
Litiopa melanostoma (Rang). 
Nerita fulgurata (Gmel.). Beyond Cavech village, on rocks 
out of the water at low tide. 
Neritina punctulata Lam. In Cavech river on rocks near 
the limit of high tide. Often these shells were nearly covered 
with small oval cases (of an insect ?). 
Neritina listert Pfr. Close to N. virginea, only larger. 
Neritina virginea (Linn.). Numerous on the muddy banks 
of Cavech river, covered with water at high tide, very plen- 
tiful on the pebbly beach of Rio Dulce. 
Neritina lineata reticulata (C. & F.). In thick swampy 
woods near the beach. 
Neritilia succinea guatemalensis (Pilsbry). Just above 
high tide in a clear pool of Cavech river; with them were a 
few young N. virginea. 
Cylichnella bidentata (Say). Two specimens. 
Haminea solitaria (Say). One specimen. 
Tagelus poeyi Dall. 
Mulinia guadelupensis (Reel.). 
Strigilla pisiformis (Linn). Common on the beach, but 
both valves together were scarce. 
