100 



. Descriptions of twenty new species of the Genus Car- 



DITA, FROM the COLLECTION OF HuGH CuMING, EsQ. 



By G. p. Deshayes. 



(Mollusca, PI. XVII.) 



1. Cardita purptjrata, Desh. (PI. XVII. fig. 12, 13.) C. testa 

 ovato-transversa, subtrigona, ineBquilaterali, a?itice breviore, ob- 

 tusa, depressiuscula, radiatim sulcata, albo-flavescente postice ru- 

 fescente ; umbonibus obliquis prominentibus ; lunula minima, pro- 

 funda, plana, lavigata ; costis transverse breviter squamosis, sex 



et viginti, posiicalibus angustis, scabriusculis, una inter alias pro- 

 minentiore ; valvis intus pallide purpureis, ad margines vivide 

 purpureo-radiatis. 

 Hub. New Zealand. Coll. Cuming. 



2. Cardita Essingtonensis, Desh. C. testa elongato-angusta, 

 transversa, maxime ineBquilaterali, antice angusta, truncata, in/erne 

 sinuosa, postice latiore subspathulata, alba, ad apices fusco-punc- 

 tata, radiatim ineequaliter costata, in interstitiis costula minore 

 inlerjecta ; costis in latere antico angustis, alteris sensim latioribus 

 et crassioribus, medianis et posterioribus squamosis ; umbonibus 

 minimis fulvo-tinctis ; lunula parva, profunda, subcirculari.fusca ; 

 valvis intus postice superneque fusco-tinctis. 



Hah. Port Essington, Australia. Coll. Cuming. 



3. Cardita Californica, Desh. C. testa elongato-transversa, 

 lateraliter compressa, incequilaterali, anterius pallide fusca, poste- 

 rius castanea, radiatim costata, costis inmqualibus quatuordecim 

 ad sexdecim, transverse irregulariter striatis, striis antice ap- 

 pressis ; costis in latere antico planis, depressis, latis, in medio 

 quatuor vel quinque angulatis, squamis obliquis numerosis imbri- 

 catis , posticis ineequalibus , ultima majore squamis major ibus scepius 

 albidis exasperata; latere antico brevi, obtuso, postico dilatato, 

 oblique truncato ; valvis intus atrofuscis, antice pallidioribus. 



Hab. Gulf of California. Coll. Cuming. 



4. Cardita excavata, Desh. (PI. XVII. fig. I, 2, 3.) C. testa 

 elongato-transversa, maxime incequilaterali, antice brevissima, 

 subtruncata, postice dilatata, inferne sinuosa et hiante, longitudi- 

 naliter et radiatim costata, alba, costis posticis roseo-flavis vel squa- 

 lidefuscis ; umbonibus minimis, compressis, approximatis, perobli- 

 quis ; lunula angusta, profundissima ; costis inaqualibus, primis in 

 latere antico a7igustioribus, alteris sensim latioribus et crassioribus 

 squamis proslongis armatis. 



Hob. Sydney. Coll. Cuming. 



.5. Cardita umbilicata, Desh. C. testa elongato-transversa, 

 maxime incequilaterali, lateraliter compressa, radiatim costata; 

 latere antico brevissimo, angusto, truncato, postico latiore, dila- 

 tato, obtuso; umbonibus minimis, obliquis; lunula angusta, pro- 

 funda, umbiliciformi ; costis octodecim, primis in latere antico 

 angustis, crenulato-squamosis, sequentibus medianis sensim latiori- 



