Zoological Society. 505 



solidd, compressiusculd, vix nitidd, albidd aut flavescente, maculis 

 aut strigis lineisve brunneis aut fusco-purpurascentibus radiatd, 

 concentrice sulcata ; sulcis antice confertis, subimbricatis , postice 

 sublamellosis remotiusculis ; margine ventrali convexo, utrinque 

 sursum acclinantc ; dorsali utrinque subdeclivi, antice convexius- 

 culo, postice subrecto, subincurvato, subdentato ; latere postico 

 attenuato, rostrato, paululum breviore, ad extremitatem biangulato ; 

 costd umbonali valde prominente ; ligamento inconspicuo ; super- 

 iicie internd albidd aut flavidd ; dentibus lateralibus validis, sub- 

 cequidistantibus. Long. 0*95 ; lat. 2'40 poll. 



Hab. Guacomayo, Central America; in coral sand. 



Intermediate between Spengleri and Mexicana. 



Tellina Rastellum. Tel. testd elongatd, convexiusculd, cequilate- 

 rali, solidd, flavidd, pallide roseo radiatd, antice sulcatd, postice 

 squamosd ; squamis erectis, lamellosis, in iisdem seriebus cum sulcis 

 concentricis, ordinatis ; margine ventrali vix convexiusculo ; dor- 

 sali utrinque paululum declivi, antice vix convexiusculo, postice 

 recto aut subincurvato ; latere postico attenuato, subrostrato, ad 

 extremitatem oblique biangulato ; extremitate anticd rotundatd ; li~ 

 gamento, et costd umbonali, conspicuis ; superficie internd albidd, 

 umbones versus aurantio utrinque fucatd; dentibus lateralibus 

 validis, subcequidistantibus. Long. 161 ; lat. 3*61 poll. 



Hab. Zanzibar. Mus. Cuming, Stainforth, &c. 



A species frequently confused with pulcherrima, but much more 

 elongated, the sulci stronger, and the scales entirely absent from the 

 anterior side. 



Tellina asperrima. Tel. testd oblong o-ellipticd, convexiusculd, 

 solidiusculd, flavidd aut incarnatd, roseo-radiatd, totd superficie 

 externd, squamis asperrimd ; squamis antice semilunars, postice (et 

 prasertim supra costam umbonalem distinctam) spinosis ; margine 

 ventrali medio subrecto flexurd distinctd ; dorsali utrinque subde- 

 clivi et paululum convexiusculo ; latere antico breviore ; extremitate 

 posticd subbiangulatd, attenuatd ; dentibus lateralibus magnis, an- 

 tico approximato. Long. TO; lat. 1*85 poll. 

 An unique specimen, in the cabinet of Mr. Cuming ; found by him 



at Sual, province of Pangasinan, isle of Luzon (sandy mud, six 



fathoms). Allied to pulcherrima. 



Tellina Jubar. Tel. testd T. virgatae affinis, sed magis trian- 

 gulari, altiore, minus elongatd; rubro-purpured, radiis albis aut 

 albidis ornatd ; margine ventrali subarcuato ; dorsali utrinque de- 

 cliviore ; superficie internd albidd, aut coloribus externis fucatd. 

 Long. 1-65; lat. 2 -50 poll. 



Hab. ? Mus. Cuming, Sowerby, &c. 



Tellina verrucosa. Tel. testd oblong o- elongatd, solidd, com- 

 pressd; aut flavidd, rubro-purpureo radiatd, aut pallide rosed, 



the Lamarckian sense of the words; but as I find this is contrary to the 

 practice of the other writers in these Proceedings, for the sake of uniformity 

 I now conform to their phraseology. 



