1870. | MR. H. ADAMS ON PERUVIAN SHELLS. 375 
Fam. AMPULLARIID&. 
3. Pomus sprxu1, D’Orb. 
4. Pomus coLUMBIENSIS, Sow. 
5. Pomus coLUMELLARIS, Gould. 
Fam. Heticip2, 
6. SuccrnEa ELoNGATA, Drap. 
7. Rumrna (OpeAs) CUENCANA, Pfr. 
8. Rumina (Opeas) micra, D’Orb. 
9. Cuausitia (NENA) EPIstomium, Kust. 
10. SoLaRopsis CASTELNAUI, Hupé. 
11. AMMONOCERAS THOMasI, Pfr. 
12. OpHi0oGyRA ENTODONTA, Pfr. 
13. Buximus ostoneus, Mill. 
14, Orostomus (Drymzvus) sTriGaTus, Sow. 
15. Orostomus (DryMvs) simiLaRis, Moric. 
16, Orosromus (DrymMzvs) saccatus, Pfr. 
17. Orosromus (LEIOSTRACUS) RECTILINEARIS, Pfr. 
18. Orosromus (LEIosTRACUS) GUEINZII, Pfr. 
19. ToRNATELLINA (LEPTINARIA) ANTILLARUM, Shuttl. 
Fam. Limnz1D. 
20. PLanorsis (HELIsoMA) TENAGOPHILUS, D’ Orb. 
21. Puanorsis (HELIsoMA) PEREGRINUS, D’Orb. 
22. PLaNorBis (SPIRORBIS) ANATINUS, D’Orb. 
Fam. CycLoPHORID&. 
23. CycCLOPHORUS CROSSEANUS, Hidalgo. 
24, APEROSTOMA BARTLETTI, sp. nov. (Plate XXVII. figs. 1, 1a). 
A. testa late umbilicata, depressa, solidiuscula, confertim plicatulo- 
striata, sub epidermide fulva albida, ad suturam albo fasciata ; 
spira modice elevata, sutura impressa; anfr. 6, convewiusculis, 
ultimo circa umbilicum costa prominente instructo ; apertura obli- 
qua, subcirculari, intus albida ; perist. continuo, recto, subacuto, 
superne angulatim producto, margine columellari subcanaliculato. 
Opere. ? 
Diam. maj. 21, min. 19, alt. 14 mill. 

25. BourciERA FRASER], Pfr. 
