508 Zoological Society. 



Hab. Tumbez, Peru; soft sandy mud, five fathoms. 



Although not easily confused with any of that section (with two 

 lateral teeth) to which it belongs, it closely resembles Tellinides pur- 

 pur ascens. 



Tellina Sowerbii. Tel. testa subellipticd, subincequivalvi, tenui, 

 compressd, Icevigatd, politd, candidd; margine ventrali arcuato, 

 postice sursum acclinante; dorsali antice vix paululum declivi, 

 convexiusculo, postice paululum declivi, prope nates subincurvato, 

 deinde convexo ; latere antico longiore, subproducto, postico rotun- 

 dato -acuminato ; ligamento parvo, angustissimo, infosso ; flexurd 

 ventrali costdque umbonali subinconspicuis ; superficie internd 

 albidd, plerumque aurantio tinctd ; dentibus lateralibus tenuibus, 

 subcequidistantibus. Long. 2 ; lat. 3*30. 



Hab. ? Mus. Sowerby, Hanley. 



Bears a slight resemblance to the acuta of Wood. 



Tellina pudica. Tel. testd parvd, solidd, ovato-subtrigond, sub- 

 cequilaterali, nitidd, candidd, sublcevigatd, tenuissime concentrice 

 striatd ; margine ventrali antice arcuato, postice subith sursum 

 acclinante ; dorsali utrinque valde declivi, antice convexo, postice 

 elongato, subrecto ; latere antico paululum breviore, subventricoso, 

 rotundato ; postico compresso, rostrato ; extremitate posticd sub- 

 acuminatd ; natibus prominentibus ; flexurd ventrali costdque um- 

 bonali subinconspicuis ; ligamento minimo, infosso ; superficie in- 

 ternd politd; dentibus lateralibus distinctis, subapproximatis , 

 subcequidistantibus. Long. 0*30 ; lat. 0*40 poll. 



Hab. Catbalonga, isle of Samar; ten fathoms, soft mud. 



A stout little shell, possessing the general contour of a Ne&ra, and 

 not easily to be confused with any species of this genus. 



Tellina nux. Tel. testd obovali, subincequivalvi, subcequilaterali, 

 tenui, convexd aut subventricosd, nitidd, sublcevigatd aut in/erne 

 concentrice substriatd, intus extusque albidd, umbonibus hyalinis et 

 fulvis ; margine ventrali subarcuato, dorsali utrinque convexo, satis 

 et cequaliter declivi; extremitate posticd obtusd, attenuatd ; liga- 

 mento angustissimo, infosso ; natibus obtusis ; fiexurd distinctd ; 

 costd umbonali inconspicud ; dentibus lateralibus distinctis, antico 

 paululum propinquiore. Long. 0*50; lat. 0'75 poll. 



Hab. St. Nicholas, Zebu ; sandy mud, four fathoms. 



More oval than the three succeeding closely allied species. 



Tellina pinguis. Tel. testd parvd, rotundato -ovali, tenui, subincequi- 

 valvi, subcequilaterali, nitidd, convexd aut subventricosd, intus ex- 

 tusque albidd (rarius incarnatd), Icevigatd (nonnunquam concentrice 

 substriatd} ; margine ventrali arcuato, dorsali utrinque convexo 

 et subcequaliter declivi; extremitate posticd obtusd; flexurd di- 

 stinctd; natibus minimis ; costd umbonali fere obsoletd; ligamento 

 angustissimo, infosso; dentibus ut in T. nuce. Long. 0*50; 

 lat. 0-60 poll. 



Hab. St. Nicholas, Zebu. 



By its more orbicular outline it may be distinguished from nux 

 and casta. It is still more closely allied to robusta, but its tenuity, 



