Fig. 1. 
Fig. 
14. 
. —— aspera, Phil. (p. 587), Salvador, specimen from Paetel’s collection, 7. 
. Eupera pittieri, nu. (p. 553), Sierpe, }- 
. Pisidium abditum, Haldem. (p. 554), Cartago, $. 
. Unio imbricatus, Mirch (p. 498), Nicaragua, Mérch’s type-specimen belonging to the 
. Guppya angasi, Tryon (pp. 120, 619), Alta Talamanca, two views, 3 
ONO ARO Ww 
EXPLANATION OF PLATES. 
PLATE XLIILI. 
Spherium costaricanum, n. (p. 552), Alajuela, }: 1 a, right valve, inside ; 1b, seen from 
above. . 
luridum, n. (p. 552), Ameca, 7: 26, young specimen ; 2c, seen from above. 
martensi, Pilsbry (p. 552), Lake Patzcuaro, \ 
specimen received from Pilsbry, natural size, \ 
| 
a, right valve, inside; 6, seen from 
above; the upper sketch indicates 
J the natural size. 
Museum of Copenhagen: 6a, right valve, inside; 6 6, seen from above. 
. Melampus trilineatus, C. B. Ad. (p. 559), Punta Arenas, 3. 
tabogensis, C. B. Ad. (p. 560), Panama, ¢. 
strigosus, n. (p. 560), Rio Boto, 3. 
panamensis, C. B, Ad. (p. 561), Panama: 10a, another somewhat narrower specimen, 
both 3. 
bocoronicus, Mirch (p. 560), Punta Arenas, obtained by Biolley, 3. 
. Littorina philippii, Carp. (p. 584), Mazatlan, obtained by Ringe, $. 
, var. alba, n. (p. 585), Mazatlan, 3. 
——~, var. penicillata, Carp. (p. 584), Mazatlan, obtained by Forrer, §. 
. —— ——., young specimen from Nicoya, #. 
. —— philippii, Carp., var. subsuturalis, nu. (p. 585), San José, Guatemala, 3. 
— , var. latistrigata, n. (p. 585), Punta Arenas, §. 
[The vertical lines placed near figg. 7-18 indicate the natural size.] 
PLATE XLIV. 
Salasiella elegans, v. Mart. (p. 618), Colima: 1, another specimen, both 5. 
3° 
micans, Ang. (pp. 121, 620), Bruschik, two views, }. 
. Streptostyla sargi, Fisch. & Cr., var. championi, n. (p. 617), Sabo, 7. 
. Glandina pittieri, n. (p. 611), Talamanca. 
. Streptostyla (Pittieria, n.) bicolor, n. (p. 617), Alta Talamanca. 
. Semisinus maculatus *, Lea (p. 646), Rio Tararia, ? 
> 1° 
. Pachychilus (Potamanaz) pilsbryi, n. (pp. 463, 646), Santa Gertrudis. 
9. 
Otostomus colimensis, Rolle (p. 630), Colima, Rolle’s typical specimen. 
[10. Tornatellina pittieri, v. Mart. (p. 640), Cocos Island, type-specimen obtained by H. Pittier, 
11. 
two views, ?.] . 
Potamides (Cerithidea) costatus, DaCosta (p. 572), Progreso, 2: 11 a, operculum. 
[12. Succinea globispira, v. Mart. (p. 641), Cocos Island, type-specimen, two views, 2] 
13 
14. 
15 
16. 
17 
Amnicola vulcani, n. (p. 645), Lake of Atitlan, 2, 
stolli, n. (p. 645), Antigua, 3. 
Ortalichus princeps, Sow., var. elegans, Rolle (p. 629), Colima, Rolle’s type-specimen. 
zoniferus, Streb., var. nobilis, Rolle (p. 629), Colima, Rolle’s ty pe-specimen. 
Pachychilus largillierti, Phil. (pp. 450, 645), Amatitlan, living animal from a drawing 
made by Dr. O. Stoll. | 
* Named Hemisinus maculatus on the Plate. 
