340 MOLLUSCA. 
Hab. E. Guaremata: around the Lake of Yzabal (Golfo Dulce), under the bark of 
trees (Morelet | ?°). | 
W. Guatemata, Antigua, on the aqueduct, in company with S. guatemalensis (Stoll). 
Centra. and S.W. Nicaragua: Matagalpa (Rothschuh, in Mus. Berol.) ; around the 
Lake of Nicaragua and near the Rio San Juan (Zate ®). 
S. Panama: Panama (Zate*, Capt. Field +). 
13. Succinea ampullacea, sp.n. (Tab. XIX. fig. 11.) 
Testa inflate ovata, tenuis, leviter striatula, nitidula, pallide succinea; spira perbrevis, conica; anfr. 3, con- 
vexi, ultimus ventrosus ; apertura 3 longitudinis equans, ovata, parum obliqua, superne paulum angustata, 
margine externo et basali arcuatis, columellari tenuissimo, sat concavo. 
Long. 23, diam. 15; apert. long. 18, lat. 11 millim. . 
Median tooth and first laterals. 
Hab. W. Mexico: Ameca, State of Jalisco (Richardson). 
This shell is extremely like some of the forms of Limnca, but the structure of the 
jaw and the radula shows that it really belongs to Succinea. The quadrate appendage 
to the jaw is well developed, and the teeth of the radula are formed as in Succinea, the 
median tooth being equal in size to the laterals, and all having comparatively large 
pointed cusps. 
Of the following species or varieties, which for convenience are here placed at the 
end of the genus, I have had no opportunity of examining specimens. They must 
therefore remain as doubtful for the present. 
Succinea concordialis (A. Gould), Fisch. & Crosse, Miss. Scient. Mex., Mollusca, i. 
p. 670, t. 27. figg. 10, 10 a, 6.—MeExico, Toxpam, State of Vera Cruz (Sallé). 
The figure given by the authors (diameter of the shell one-half of its length, 
aperture occupying seven-tenths of the whole length) differs somewhat from that 
given by Binney (Terr. air-breath. Moll. N. Am. t. 77. fig. 2) (diam. four-sevenths, 
aperture two-thirds of the length). A. Gould’s type was from Lake Concordia, 
Texas. 
