422, MOLLUSCA. 
Hanley! and Reeve? give simply “ Mexico” as locality. Neither Strebel nor 
Fischer and Crosse mention this species, but H. H. Smith obtained a number of 
specim ens. 
17. Ampullaria erogata. : 
Ampullaria erogata, Crosse & Fisch. Journ. de Conch, xxxviii. p. 118 (1890) '; Miss. Scient. Mex., 
Mollusca, ii. p. 251, t. 46. figg. 6, 6a, 7°. 
Hab. 8. Mexico: Cacoprieto, on the Isthmus of Tehuantepec (Sumchrast *). 
N. GuateMaLa: Department of Peten (Morelet *). 
I am somewhat doubtful about this species: Fischer and Crosse’s fig. 6 agrees very 
well with A. cerasum, save in the pale reddish-grey colour of the peristome ; fig. 7 has 
not the same globose appearance, but is somewhat more ovate, its spire is shorter, and 
the sutures are more superficial. In the explanation of the plate, fig. 7 is termed var. p, 
but in the text no mention of any variety is made; presumably the second of the two 
localities quoted, Cacoprieto, may be referred to fig. 7. The description gives “ anguste 
perforata” and “perforation ombilicale 4 peine marquée, exagerée dans les figures 
6 et 7”; both figures show the umbilicus as large as in A. cerasum. If it were not 
for these statements I should have treated their fig. 6 as representing a pale-mouthed 
specimen of A. cerasum. 
IV. PATULE. 
18. Ampullaria cumingi. 
Ampullaria cumingi, P. King, Zool. Journ. v. p. 344 (1850-51) *; Philippi, in Martini & Chemnitz, 
Syst. Conch.-Cab. ed. 2, Ampullaria, p. 2, t. 2. fig. 3°; Hanley, Conch. Mise., Ampullaria, 
t. 8. fig. 18°; Reeve, Conch. Icon. x., Ampullaria, t. 17. fig. 81 *. 
Globose, solid, brown, somewhat banded, with conical spire, rather deep sutures, and comparatively small and 
narrow aperture. 
a. Long. 42, diam. 36; apert. long. 313, diam. 263 millim. 
b. ” 30, ” 28 5 ” 203, » 1d ” 
C. 9 23, 4, 213 5 - 17, «4, «Idi ” 
d. 4, 20, ” 193 3 ” 14, ry) 10 ” 
Hab. N. Panama: Rio Chagres (Dr. Kobelt). 
S. Panama: Island of Taboga, in the Bay of Panama (P. King). 
There is some uncertainty regarding. the true dimensions of this shell. The 
measurements given under a are taken from Reeve’s figure ; but King himself says in 
his short description ?: “ lat. 17’, long. 13% poll.,” the breadth (=diameter) agreeing very 
well with the above-mentioned figure, but not the length, which would thus be about 
34% millim., instead of 42. In the late Dunker’s collection there are two specimens of 
A. cumingi obtained from Consul Gruner of Bremen, who frequently exchanged shells 
with Cuming, both very pale brown and considerably smaller (measurements given 
