420 MOLLUSCA. 
14. Ampullaria yucatanensis. 
Ampullaria yucatanensis, Crosse & Fisch. Journ. de Conch. XXxxviil. p. 110 (1890) *; Miss. Scient. 
Mex., Mollusca, ii. p. 240, t. 48. figg. 8, 3.7; Pilsbry, Proc. Acad. Phil. 1891, p. 826°. 
Globose, rather thin, greenish with numerous inconspicuous bands, or dusky brown, nearly unicolorous ; 
umbilicus very narrow. Outer margin of the aperture thin, scarcely expanded, yellowish, peculiarly 
projecting and arcuated in its upper third. 
a. Long. 50, diam. 40; apert. long. 40, diam. 27 millim. 
bB2 6, «648, ) S45; % 39, , 26 ,, 
c& 4 oO, 4, 45; % 35, 4, 25 4, 
d. 4, 32, 4, 29; - 25, , 17 ,, 
a. Fischer and Crosse’s measurements, as given in the text; 6. Dimensions taken from their figure ; 
¢. Dimensions of Godman’s specimen ; d. Paetel’s specimen. 
Hab. Yucatan: San Gerénimo, in marshes (Morelet?); Dos Cenotas, Shkolak (LHeii- 
prin®); Merida (f. D. Godman). 
The specimen in Paetel’s collection, with the label A. cumingi, King, Panama 
(mounted side by side with a true A. cwmingi), is comparatively somewhat broader and 
has the spire a little less elevated than in the example 0, but it agrees more fully in 
these points with Fischer and Crosse’s figure. 
Var. yzabalensis, nn. (Tab. XXIV. fig. 9.) 
Umbilicus nearly closed and the spire comparatively a little higher; bands very faint; in other respects 
agreeing with Yucatan specimens. 
Long. 44, diam. 39; apert. long. 33, diam. 22 millim. 
” 37, cB 31 3 9 28, ” 18 ” 
Hab. E. Guatemata: Lake of Yzabal (Stoll). 
Among the specimens given me by Dr. O. Stoll there is one with a more open 
umbilicus; but as it differs also somewhat in form and colour, I am not sure whether it 
is from the same locality. 
15. Ampullaria hondurasensis. (Tab. XXIV. fig. 7.) 
Ampullaria hondurasensis, Reeve, Conch. Icon. x., Ampullaria, t. 3. fig. 15 (1856) *. 
? Pomus pyrum (Phil.), Tate, Amer. Journ. Conch. v. p. 152 (1870) * (nec Phil.). 
Testa globosa, obtecte perforata, verticaliter plicatulo-striata; olivacea, nitidula, fasciis angustis, extus vix 
conspicuis, basi paulo magis distinctis; spira brevis, obtuse conica; anfr. 43, tumidi, sutura profunda, 
ultimus sat inflatus; apertura elliptica, supra et infra rotundata, peristomate recto, basi levissime 
expansa, albida, retrorsum sublabiato, margine externo valde arcuato, columellari subverticali, dilatato, 
breviter reflexo, perforationem fere plane obtegente, fauce rufescente, inconspicue fasciata. 
Long. 38, diam. 334; apert. long. 30, diam. 20 millim. 
Hab. Honpuras }. 
CentraL Nicaragua: Lake of Nicaragua (coll. Dunker); River San Juan, its 
tributaries and creeks, River Panaloya, and in the Lake of Nicaragua at Granada 
(Late). 
Allied in form to A. delattret and A. yucatanensis, but differing from both in the 
