321 
gusto, inequaliter tridentato ; dente laterali postico compresso, 
antico breviore acuto. 
soi 14; ee 14, diam. -%;, poll. 
ab, ——? 
10. CyRENA BRUNNEA, Prime. C. testa orbiculato-subtrigona, 
subinflata, subequilaterali, transversim tenuiter et regulariter 
striata, epidermide fuscescente vestita, valvis crassis, solidis ; 
intus candidissima ; latere antico producto, latere postico trun- 
cato; cardine angusto; dentibus cardinalibus subequalibus ; 
lateralibus subequalibus, antico paulo crassiore. 
Long. 1,4, lat. 14, diam. 1, poll. 
Eo 
11. CyrENA opscuRA, Prime. C. testa trigona, inflata, cordi- 
formi, solidissima, alta, tumida, inequilaterali, transversim 
striata, epidermide fuscata vestita, intus alba; umbonibus pro- 
minentibus, erosis ; cardine angusto ; dentibus cardinalibus tri- 
bus ela yay ; lateralibus magnis, antico majore, acuto. 
Long. 1,%,, lat. 1;5;, diam. 15%), poll. 
Hab. New Granada. 
12. CorBIcULA MAXIMA, Prime. (C. testa maxima, orbiculato- 
trigona, solida, tumida, inequilaterali, compressa, transversim 
tenuissime et regulariter striata ; epidermide flavescente, niti- 
dissima, intus alba; umbonibus parvis, acutis ; dentibus car- 
dinalibus inequalibus, divaricatis ; lateralibus elongatis, an- 
gustis, subaqualsbes, arcuatis, tenuissime serrulatis. 
Long. at det 13, diam. 1, poll. 
Hab. 
\4 13. CorBICULA OVALIS, Prime. (C. testa equilaterali, tumidula, 
(re epidermide fuscescente vestita, transversim regulariter striata ; 
intus violacea ; umbonibus prominentibus, violaceo subradiatis ; 
cardine incrassato, inequaliter tridentato ; dentibus laterali- 
bus crassis, prelongis, tenuissime striatis. 
Long. 1, lat. =8, diam. 55, poll. 
Hab. 2 
14. CorBICULA CYRENIFORMIS, Prime. OC. testa trigona, 
equilaterali, subcordiformi, inflata, tumida, crassa, fortissima, 
intus violacea, epidermide fuscescente vestita, transversim regu- 
lariter striata, rugosa; umbonibus tumidis, erosis, obliquis, 
dentibus cardinalibus fortibus inequalibus, lateralibus subequa- 
libus, striatis. 
Long. Io» | _ 1,3,, diam. 75, poll. 
Hab. 
15. CoRBICULA REGULARIS, Prime. C. testa ovato-transversa, 
equilaterali, intus violacea, epidermide viridi-flavescente ; um- 
No. 437.—Procrrpincs or THE ZOOLOGICAL SOCIETY. 
