14 



February 25, 1S45. 



R. C. Griffith, Esq., in the Chair. 



" Descriptions of six new species of Donax, in the coUection of 

 Hugh Cuming, Esq. (Corr. Memb.)," by Sylvanus Hanley, Esq. 



DoNAX TicAONicus. DoTi. tcstd cuneiformt , convexd, nitidissitnd, 

 solidd, obliųud, Icevigatd, maiime integuilaterali, albidd, aut livido- 

 purpurascente, concolore, cpidermide flavescente indui d ; margine 

 ventrali integro, magis minusve convexo ; dorsali, antice declivi et 

 subrecto aut subretuso, postice subrecto et subito declivi; extre- 

 mitate lateris antici producti, attenuaUi, rotundaid ; latere postico 

 brevissimo, truncato et inferne obtuse angulato ; pube concentrice 

 et proftmde rugosd ; natibus acutis, prominentibus ; svperjicie in- 

 ternd aut violaced aut albidd violaced pustice fucatd ; dente late- 

 rali antico remoto, jiostico approximato. Long. T; lat. 1 '50 poli. 



Hab. Ticao, Philippines (Cuming). 



Remarkable for its oljliąuity and the abrupt truncation of the pos- 

 terior side. 



DoiVAX cuLTER. DoH. testd elongatd. angustd, convexd, satis inegui- 

 laterali, niiidd, striulis exilibus con/ertim radiatd, variis coloribus 

 pictd (plerumgue purpured, sed etiani fluvd lineis purpureo-brun- 

 neis radiatd, albidd radiis viulaceis aut lividis, aurantid et rosed, 

 Sčepf! radiis albidis ornatu); margine ventrali crenulato, antice sub- • 

 recto, postice convexo ; dorsali antice recto et vix paululum de- 

 clivi, posticl' convexo satisgue declivi ; latere antico producto, ad 

 estremitatem obtuse rotundato ; postico rotundato-cuneiformi ; lu • 

 nuld ligamentogue anguslis ; pube striis simplicibus radiatd ; costd 

 umbonali obtusissimd ; dentibiis lateralibus haud remotis. 



Var. a. Testd subinaguilaterali ; margine ventrali medio subpostice 

 retuso; dente laterali antico, plerumgue magis approximato. 



Var. b. Testd minus elongatd et įnagis inaguilaterali ; margine ven- 

 trali rarb retuso; dente laterali antico plerumgue magis remoto. 



Long. 0-50; lat. 1-50. 



Hab. Var. a. Matzellan, Gulf of California (Cuming). 

 Var. b. Acapulco (Cuming). 



Rather a common shell, and closely allied to pulchella. 



DoNAX ASPtR. Don. testd trigond, ventricosd, solidd, subineeguilate- 

 rali, albidd aut carned, anties nitidiusculd et radiatim striatd, pos- 

 tice impolitd et radiatim costellatd ; striis ezilibus et simplicibus; 

 costcllisparvis, decussatis, aut subsgtianiosis aut subgranosis, supra 

 costam umbonalem angulatam confertis ; margine ventrali crenato, 

 arcuato ; dorsali antico, valde declivi, subrecto ; postico retuso, 

 inernii, subitbgue declivi : extremitate lateris antici longioris, ro- 

 tundatd , posticd angtclatd; natibus valde prominentibus et maximi 



