AMPULLARTA. 417 
7. Ampullaria occlusa. | 
Ampullaria occlusa, Crosse & Fisch. Journ. de Conch. xxxviii. p- 111 (1890)*; Miss. Scient. Mex., 
Mollusca, ii. p. 244, t. 45. fige. 8, 3.a-c?. 
Ovate, vertically striate and a little malleated, dark green, with numerous bands; umbilicus very narrow, but 
not closed ; peristome simple, yellowish, interior of the aperture dark brown, paler above. 
Long. 50, diam. 41; apert. long. 38, diam. 24 millim. 
Hab. W. Guatemata: freshwater lagoon of Tanesco, on the Pacific coast, three leagues 
from the mouth of the River Guacalate (Bocourt 2). 
This seems to be another form very near A. flagellata, and I retain it as a separate 
species chiefly on account of its habitat. There are two specimens among the shells 
collected by Conradt in Guatemala, without nearer indication of locality, but probably 
from Panzos in the Polochic Valley, which much resemble the figure of A. ocelusa, 
except that they are considerably smaller (long. 27, diam. 23 millim.), without doubt 
not full-grown. 
8. Ampullaria auriformis. 
Ampullaria auriformis, Reeve, Conch. Icon. x., Ampullaria, t. 28. fig. 183 (1856) *. 
A very distinct form, oblong, with an angular spiral line somewhat beneath the suture. 
Long. 60, diam. 49; apert. long. 46, diam. 30 millim. 
Hab. Honpvuras!. 
9. Ampullaria dysoni. 
Ampullaria dysoni, Hanley, Conch. Misc., Ampullaria, t. 2. fig. 5 (1854-56) *; Reeve, Conch. Icon. 
x., Ampullaria, t. 11. fig. 49°. 
Peculiarly broadly conoid, the aperture occupying scarcely more than § of the whole length; spire conical, 
acute, with superficial sutures; umbilicus broad. 
a, Long. 56, diam. 52; apert. long. 35, diam. 27 millim. 
b 4, 69, 5, 59; » 49, , 32 4, 
a. Figure given by Hanley; 0. Figure given by Reeve. 
Hab. Honpvras (Dyson 1 2). 
II. DOLIIFORMES. 
10. Ampullaria belizensis. 
Ampullaria belizensis, Crosse & Fisch. Journ. de Conch. xxxvili. p. 110 (1890) '; Miss. Scient. 
Mex., Mollusca, ii. p. 231, t. 45. figg. 2, 2a-c, t. 48. figg. 9, 9a”. 
Intermediate in form between the ovate (Cassidiform) and the globose species, rather broadly umbilicated, 
reddish-brown, with numerous very distinct dark bands and a yellowish peristome. Very young specimens 
have minute epidermal scales placed in numerous spiral rows. 
Hab. Britisn Honpuras: Belize (Bocourt '). 
I have not seen a specimen of this species. 
BIOL. CENTR.-AMER., Terr. and Fluviat. Mollusca, August 1899. 53 
