19& 



Cardita tATicosTATA. Card. testd ovalo-rhombcd , turgidd, 



long'Uudine altitudinevi superante, rndialim costatd, cpidermide 



folvescente indutd, Jasciis brunneis longitudinaliter notatd ; 



margine dorsali postico elevatiusculo ; costis latis, anticis jirae- 



serttm, lineis elevatis decussatis : long. 2"1, lat. 1'4-, alt. 1*6 poli, 



Hab. in Americu Centrali (Guacomayo). 



Found in sand, at a depth of from six to tvvelve fathoms, at St. 

 Elena, Panama, and Real Liejos. — G. B. S. 



Cardita radiata. Card. testd oblongd, pallescente, maculis vel 

 fasciis Juscis variegatd ; latere antico brevi, postico elongato ; 

 costis paucis latis radiata, coslis anticis transversim decussatis, 

 medianis postice angulatis, posticis rotundatis, dorsali sųuamiferd: 

 long. 2-1, lat. 0-6, alt. 0-9 poli. 



Hab. ad Salango, Columbiae Occidentalis, et ad Panamam. 



Found in muddy sand at from six to twelve fathoms, — G, B. S. 



Cardita affinis. Card. testd oblongd, pallidd, Jiisco-varid, 

 latere antico brevi, postico elongato ; costis paucis latis radian- 

 tibus, anticis obsoletiusculis, posticis prominentibus angulosis, sub- 

 scjuamiferis : long. l'į, lat. 0-6, alt. O 6 poli. 



Hab. in America Meridionali. 



Dredged from sandy mud, at a depth of from six to tvvelve 

 fathoms, in the Bay of Montejo and Gulf of Nocoiya. — G. B. S. 



Cardita spurca. Card. testd obovatd, albd, epidermide olivaced 

 indutd; costis radiantibus eminentibus granosis ornatd ; latere 

 postico superne anguloso : long. I, lat. 0-55, alt. 07 poli. 

 Hab. ad oras Peruviae. 



Dredged among coarse sand and gravel,in from six to ten fathoms, 

 at Iqiiiqui, in Peru. — G. B. S. 



Cardita muricata. Card. testd obovatd, albicante, costis radi- 

 antibus muricatis ornatd, posticis magnis distantibus, anticis mi- 

 noribus approzimatis ; latere antico brevissimo : long.Vl, lat. 

 0-55, alt. 0-55 poli. 

 Hab. ad littora Insularum Maris Pacifici. 



Found attached to and under stones on the beach of Crescent 

 and Kapa Islands. A few brovvn spots are occasionally to be seen 

 ornamenting the dorsai and lateral parts of these shells. — G. B. S. 



Genus Pectunculus. 



Pectunculus multicostatus. Pect. testd suborbiculari, albd, 

 castaneo rubiginoso cinereogue variegatd ; costellis numerosis, ex 

 umbone radiantibus, transversim striatis: long. 1*5, lat. I "2, alt. 

 1 -5 poli. 

 Hab. in America Meridionali. 



Found in coarse sand and gravel, in twelve fathoms water, oiFthe 

 Island of Muerte, in the Bay of Guayaquil. 



This is one of the most beautiful of the Pectunculi, being of a pure 

 white, elegantly mottled with chestnut, rust-colour, and ash-grey : 

 it is rcmarkable that in the young shells some of the radiating ribs 



