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Carpira ovatus. Card. testd ovatd, rubido-brunned, maculis albis 
sparsim variegatd ; costis octodecim aut novemdecim, crenatis ; 
posticis levigatis, interstitiis lineis angularibus ornatis ; lunuld 
distinctd. 
Conch. Icon., Cardita, pl. 6. f. 28. 
Var. B. Testa alba, maculis ce@siis variegata. 
Hab. Isle of Corrigidor, Philippines (found in coarse sand at the 
depth of seven fathoms); Cuming. 
I was at one time disposed to consider this species as merely a 
variety of the preceding. Upon comparison and close examination, 
they were, however, found to differ in several not unimportant par- 
ticulars; the posterior ribs of the C. ovalis are smooth, they are 
altogether fewer in number, the umbones are less incurved, and there 
is a flat indented lunule beneath them, of which I find no indication 
in the C. nitida. 
Carpita tacunosa. Card. testd subovatd, radiatim costatd, costis 
und vel duabus et viginti, elevatis, vald@ compressis, subtiliter 
muricato-squamosis ; interstitiis latiusculis, lacunato-excavatis ; 
albd, aredé posticali nigerrimo-fuscd. 
Conch. Icon., Cardita, pl. 7. f. 31. 
Hab. g 
The prickly scales which surmount the singularly compressed 
ribs of this shell are placed at equal distances from each other, 
whilst each rib is in a manner festooned from one scale to the other, 
like a miniature series of inverted arches. 
Carpira canaticutata. Card. testd suborbiculatd, luteold, fusco 
varié zonatd ; radiatim costatd, costis und vel duabus et viginti, 
lateraliter compressis, annulato-serratis, interstitiis eaxcavato- 
canaliculatis ; intus albidd, fusco pallide tinctd. 
Conch. Icon., Cardita, pl. 8. f. 40. 
Hab, Philippine Islands ; Cuming. 
The leading features of this species are its rounded form, and the 
peculiar manner in which the interstices between the ribs are chan- 
neled out. 
Carpira ancisutcata. Card. tesld ovatd, rubido-fusco tinctd et 
variegatd ; radiatim costatd, costis und vel duabus et viginti, pla- 
nis, latiusculis, approximatis, interstitiis angustis, profundeé in- 
cisis ; costis umbones versus annulato-serratis, hine illine squa- 
miferis, squamis erectis. 
Conch. Icon., Cardita, pl. 8. f. 41. 
Hab. 2 
This species may be easily recognized by the narrow and deeply- 
cut interstices between the ribs, which are unusually flat towards 
the margin. 
Carpira sEMEN. Card. testd ovatd, subcompressd, tenui, radiatim 
costatd, costis plano-convexis ; olivaceo-fuscd. 
Conch. Icon., Cardita, pl. 9. f. 48. 
