306 Zoological Society. 



Conch. Icon., Cardita, pi. 4. f. 20. 



Care should be taken not to confound this species with the young 

 of the C. pectunculus. It is a solid well-developed shell, and never 

 exceeds an inch to an inch and a half in length. 



Cardita gibbosa. Card, testd ovato-oblongd, solidd, gibbosd; 



albd, costis septemdecim,fusco-variegatis, transversim radiantibus, 



rotundatis, exiliter nodulosis. 

 Conch. Icon., Cardita, pi. 4. f. 21. 



This is a solid gibbous shell, the anterior side of which is not so 

 short as in most of the oblong species of the genus. 



Cardita nitida. Card, testd subquadrato-ovali, eburned, maculis 

 ccesiis variegatd; costis duabus vel tribus et viginti, posticis prce- 

 cipue crenatis, interstitiis lineis ccesiis angularibus ornatis. 

 Conch. Icon., Cardita, pi. 6. f. 27. 

 Var. /3. Testa maculis rubidis. 



Hob. Misamis, isle of Mindanao, Philippines (found in sandy mud 

 at the depth of twenty-five fathoms) ; Cuming. 



This pretty shell is remarkable on account of the posterior ribs 

 being more strongly crenated than the anterior. 



Cardita ovalis. Card, testd ovatd, rubido-brunned, maculis albis 

 sparsim variegatd; costis octodecim aut novemdecim, crenatis ; 

 posticis Icevigatis, interstitiis lineis angularibus ornatis ; lunuld 

 distinctd. 



Conch. Icon., Cardita, pi. 6. f. 28. 



Var. (3. Testa alba, maculis ccesiis variegata. 



Hab. Isle of Corrigidor, Philippines (found in coarse sand at the 

 depth of seven fathoms) ; Cuming. 



Cardita lacunosa. Card, testd subovatd, radiatim costatd, costis 

 und vel duabus et viginti, elevatis, valde compressis, subtiliter 

 muricato-squamosis ; interstitiis latiusculis, lacunato-excavatis ; 

 albd, area posticali nigerrimo-fuscd. 



Conch. Icon., Cardita, pi. 7. f. 31. 



Cardita canaliculata. Card, testd suborbiculatd, luteold, fusco 

 varie zonatd ; radiatim costatd, costis und vel duabus et viginti, 

 lateraliter compressis, annulato-serratis, interstitiis excavato- 

 canaliculatis ; intus albidd, fusco pallide tinctd. 



Conch. Icon., Cardita, pi. 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. 



Cardita angisulcata. Card, testd ovatd, rubido-fusco tinctd et 

 variegatd ; radiatim costatd, costis und vel duabus et viginti, pla- 

 nis, latiusculis, approximatis, interstitiis angustis, profunde in- 

 cisis ; costis umbones versus annulato-serratis, hinc illinc squa- 

 miferis, squamis erectis. 



Conch. Icon., Cardita, pi. 8. f. 41. 



This species may be easily recognized by the narrow and deeply- 



