CARD IT A. 



Plate VI. 



Species 27. (Fig. 27 a and b, Mus. Cuming.) 



Cardita nitida. Card, testd subquadrato-ovali, ebur- 

 ned, maculis ctesiis variegatd ; costis duabus vcl tu- 

 bus et viginti, posticis prcecipui- crenatis, interstitiis 

 lineis ctesiis angularibus ornutis. 



The neat Cardita. Shell rather squarely oval, ivory- 

 white, variegated with grey blotches, crenated, 

 especially the posterior ones ; interstices between 

 the ribs ornamented with grey angular lines. 



Reeve, Pro. Zool. Soc, 1S43. 



Variety /3. (Fig. 27 b.) 



Testa maculis rubidis. 

 Shell with the spots reddish. 



Hab. 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. 



Species 28. (Fig. 27 c, Mus. Cuming.) 



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



maculis albis sparsim variegatd ; costis octodecim aut 

 novemdecim, crenatis; posticis Icevigatis, interstitiis 

 lineis angularibus ornatis ; lunula distinctd. 



The oval Cardita. Shell ovate, reddish-brown, spa- 

 ringly variegated with white spots ; ribs eighteen 

 or nineteen in number, crenated; posterior ones 

 smooth, interstices between the ribs ornamented 

 with angular lines ; lunule distinct. 



Reeve, Pro. Zool. Soc, 1843. 



Variety (3. 



Testa alba, maculis casiis variegatd. 

 Shell white, variegated with white spots and blotches. 

 Hab. Isle of Corriegidor, Philippines (found in coarse 

 sand at the depth of seven fathoms) ; Cuming. 



The irregularity which occurs in the number of this 

 species disagreeing with the number of the figure on the 

 Plate, arises from my having considered it as merely 

 a variety of the preceding. Upon comparison and 

 close examination, thev were, however, found to differ 



in several not unimportant particulars ; the posterior ribs 

 are smooth, they are altogether fewer in number, the 

 umbones are less incurved, and there is a fiat indented 

 lunule beneath them, of which I find no indication in the 

 C. nitida. 



Species 29. (Fig. 28 a, Mus. Stainforth ; Fig. 28 b, 

 Mus. Cuming.) 



Cardita Taxkervillii. Card, testa depresso-cordatd, 

 cardiiformi, albicante, fusco umbones versus macu- 

 latd, epidermide fuscescente indutd ; costis quinque 

 aut sex et viginti, plants, obsolete crenatis, lateraliter 

 compressis ; intus albd. 

 Lord Tankerville's Cardita. Shell depressly heart- 

 shaped, cardium-like, whitish, spotted towards the 

 umbones with brown, and covered with a light 

 brown epidermis ; ribs five or six and twenty in 

 number, flat, obsoletely crenated, compressed at the 

 sides ; interior white. 

 Venericardia Tankervillii, Wood, Ind. Test. Supp., 



p. 57. 

 Chama australis, Wood, Ind. Test. Supp., p. 6. 

 Hab. New Holland ; Wood. 



I have figured this fine species of Cardita both with 

 and without the epidermis, that the difference in its ap- 

 pearance may not lead to any confusion. It appears to 

 have received the title of Chama australis from Mr. 

 Wood to accord with his Linnaean method of arrange- 

 ment ; but in adapting that arrangement to the La- 

 marckian method, he was obliged to select a new specific 

 name, on account of there being a Venericardia australis 

 already published by M. Quoy (vide Cardita tridentala. 

 Species 22 of the preceding Plate) . 



Species 30. (Fig. 29 a & b, Mus. Cuming.) 

 Cardita antiquata. Card, testd oblique cordatd, tumidd, 

 latere postico interdum production' ; alba, umbones 

 versus rubido-fusco plus minusve maculatd; costis 

 und vcl dunlins ft viginti, angulatis, planiusculis, an- 

 ticis crenatis, posticis interdum paululum squamosis; 

 intus albd. 

 The ancient Cardita. Shell obliquely heart-shaped, 

 swollen, sometimes produced or extended on the 

 posterior side ; white, more or less spotted tow aids 



July 1843. 



