195 



Cardita laticostata. Card, testd ovato-rhombed, turgidd t 



longitudine altitudinem superante, radiatim costatd, epidermide 



Julvescente indutd, Jasciis brunneis longitudinaliter notatd ; 



margine dorsali postico elevatiusculo ; costis latis y anticis prce- 



sertim, lineis elevatis decussatis : long. 2*1, lat. 1*4, alt. 1*6 poll. 



Hah. in America Centrali (Guacomayo). 



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

 Elena, Panama, and RealLlejos. — G. B. S. 



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



t fasciis Juscis variegatd ; latere antico brevi, postico elongato ; 



costis paucis latis radiatd, costis anticis transversim decussatis y 



medianis postice angulatis, posticis rotundatis, dorsali squamiferd: 



long. 2-1, lat. 0-6, alt. 0*9 poll. 



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, Jusco-varid, 

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

 tibuSy anticis obsoletiusculis, posticis prominentibus angulosis, sub- 

 squamiferis : long. 1*4, lat. 0*6, alt. 06 poll. 



Hab. in America Meridionali. 



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

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



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

 indutd; costis radiantibus eminentibus granosis ornatd; latere 

 postico superne anguloso : long. I, lat. 055, alt. 07 poll. 

 Hab. ad oras Peruvian 



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

 at Iquiqui, in Peru. — G. B. S. 



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

 antibus muricatis ornatd, posticis magnis distantibus, anticis mi- 

 noribus approximatis ; latere antico brevissimo : long.Yl, lat. 

 0-55, alt. 0-55 poll. 

 Hab. ad littora Insularum Maris Pacifici. 



Found attached to and under stones on the beach of Crescent 

 and Rapa Islands. A few brown spots are occasionally to be seen 

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



Genus Pectunculus. 



Pectunculus multicostatus. Feet, testd suborbiculari, albd, 

 castaneo rubiginoso cinereoque variegatd ; costellis numerosis, ex 

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

 V 5 poll. 

 Hab. in America Meridionali. 



Found in coarse sand and gravel, in twelve fathoms water, off the 

 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 remarkable that in the young shells some of the radiating ribs 



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