168 



The vaulted structure of the scales ia this species is about inter- 

 mediate in its character between that of the scales of the Cardia con- 

 sors and isocardia. 



Cahdiūm Austkaliense. Card. testd transversi ovatd, Donaci- 

 formi, medio subcontractd, postice flesuoso-angulatd, subrnstratd, 

 anticė compresso-attenuatd ; dimidio postico radiaiim sulcato, an- 

 tico l<evigato, nitente ; albidd, ared posticd strigis brevibus fuscis 

 utrinque ornatd. 

 Conch. Icon., Carditim, pi. 5. f. 24. 

 Hab. Port Lincoln, South Australia ; Harvey. 

 This .«hell may be chiefly distinguished from the Cardium Donaci- 

 forme, to which it is in many respects allied, hy the contracted flex- 

 uous prolongation of the posterior portiou, and by the peculiarity of 

 one half of the shell being conspicuously grooved, whilst the other 

 half is smooth and shining. 



Cardium oviputamen. Card. testd obliąui ovatd, tenui, ventricosd, 

 radiativi tenuissime siriatd ; nived, opacd, strigis lineisve rosaceo- 

 fnscescentibus exilibus undatis concentrice nebulosd, epidermide 

 pallidd margines verstis indutd ; tnarginibus intus subtiliter crenu- 

 latis. 

 Conch. Icon., Cardium, pi. 7. f. 36. 



Hab. ? 



The general appearance of this and the following species is very 

 likę that of the Cardium serratum ; both however are of a less obliąue 

 form, and the Cardium oviputamen under consideration is more ven- 

 tricose. 



The concentrically waved pinkish brown marks above noticed, 

 though faintly indicated, are nevertheless characteristic, as distin- 

 guished from those of a different pattem, in the following species. 



Cakdiu.m vitellinum. Card. testd obligue ovatd, tenuiculd, radi- 

 atim striatd ; lutescente-albd, maculis parvis numerosis rosaceo- 

 fuscescentibus umbones versus copiose lentiginosd, epidermide luted 

 indutd ; marginibus intus crenulatis. 

 Conch. Icon., Cardium, pi. 7. f. 37. 



Hab. } 



This shell is of a less ventricose ovate structure than the preceding, 

 and farther distinguished by its different tinge and style of colouring. 



Carditjm hystrix. Card. testd subquadrato-cordatd, postice con- 

 cavo-angulatd, radiatim costatd, costis ad duas et triginta, an- 

 gustis, cotnpt-essis, posticis sguamulis brevibus, cateris spinis 

 sguamteformibus erectis, umbones versus svbinfiexis, elegantissimi 

 ornatis ; costarum interstitiis striis elevatis transversim subtiliter 

 cancellatis ; albidd, costarum interstitiis pallide rosaceis.lined vividi 

 coccined utringue piclis ; intus purpureo-rufescente. 



Conch. Icon., Cardium, pi. 8. f. 40. 



Var. /3. Testu estus omninb nived. 



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

 depth of about seven fathoms) ; Cuming. 



