668 
EXPLANATION OF PLATES. 
Figs. 11, 12. Ancylus papillaris, n. (p. 402), Rio Ameca, two somewhat different specimens from the 
Fig. 
Fig. 
same locality, +: lla, 12a, lateral views. 
13. Planorbis maya, Morel. (p. 392), Tabi, 4. 
14. tepicensis, n. (p. 393), Tepic, 4. 
15. subpronus, n. (p. 396), Amatitlan, #. 
PLATE XXII. 
1. Ampullaria flagellata, Say, var. tristrami, Fisch. & Cr. (p. 413), Lake of Peten, Tristram’s 
EQ or 
specimen of Pomus columbiensis. 
strebeli, Fisch. & Cr. (p. 415), Misantla. 
violacea, Val. (p. 414), Acapulco, specimen from Dunker’s collection, now in the 
Berlin Museum. 
. Amnicola rhegoides, Morel. (p. 432), Lake of Coatepeque, Salvador, Morelet’s type- 
specimen, from a drawing made by E. Smith, }. 
subangulata, n. (p. 485), Costa Rica, 3. 
costaricensis, Morch (p. 435), San José, Costa Rica, #. 
. Ampullaria flagellata, Say, var. melanostoma, Jonas (p. 411), Papantla, two views of the 
same specimen. 
. Amnicola (?) melanioides, n. (p. 436), Golfo Dulce, 3. 
9. , var. tenuis, n. (p. 486), Rio Boto, #. 
10. Ampullaria flagellata, Say, var. malleata, Jonas (p. 411), Tabasco. 
1]. , var. guatemalensis, n. (p. 413), Panzos: lla, very young specimen. 
12. —— , var. tristrami, Fisch. & Cr. (p. 413), Panzos, obtained by Conradt. 
PLATE XXIII. 
1. Ampullaria flagellata, Say (p. 405), Cordova. 
2. Cochliopa trochulus, n. (p. 429), Rio Grande de Terraba, three views, 2. 
3. infundibulum, n. (p. 429), Guatemala, three views, %. 
4. Ampullaria flagellata, Say (p. 405), Cordova, a rather narrow example: 4a, 4b, very 
young specimens. 
5. , var. exsculpta, Fisch. & Cr. (p. 410), Cordova. 
6. —— » var. gigantea, Tristr. (p. 412), Lake of Peten, Tristram’s type-specimen. 
7. — , var. arata, Fisch. & Cr. (p. 410), Cordova. 
8. , Specimen intermediate between the var. ewsculpta and the var. arata (p. 410), 
Cordova, with the sculpture abruptly altered near the beginning of the last whorl. 
9. Cochliopa tryoniana, Pilsbry (p. 428), Punta Mala, 2: 9a, 94, view from above and from 
below; 9c, another more elevated specimen, from the same locality. 
10 
. Ampullaria flagellata, Say, var. arata, Fisch. & Cr. (p. 410), Costa Rica, specimen given 
by Van Patten to the Berlin Museum. 
