144 



rare species. It is closely allied to the edentula of Sowerby, but 

 the beaks are more prominent in that species, and its posterior ter- 

 mination more angular. 



Teli.ina elongata. Tel. testd oblongo-angustd, subtenui, subven- 

 tricosd, intiis extusque albd, lavigatd, valde inacuilaterali, antice 

 rotundatd ; margine ventrali medio subretuso, antice sursum accli- 

 nante ; dorsali antice convexiusculo et vix paiilulum dedivi.postice 

 prodncto, recto aut subretuso satisque declivi ; latere postico brevi, 

 truncato-acumuiato hiante ; ligamento subinfosso ; fiexurd sub- 

 obsoletd ; dentibus lateralibus nullis. Long. 1'12 ; lat. 2"20poll. 



Hab. Chiquiqui, West Columbia ; in sand at three fathoms. 



The extremely narro\v shape, and the peculiarity of its upper and 

 lower edges being almost parallel, separate it from the raajority of 

 its section ; it is however closely allied to the sacceeding species. 



Tellina ASSiMiLis. Tel. testd T. elongatse simillimd, sed magis 

 ventricosd, et extremitate j)Osticd contortd, subrostratd. Long. 

 0-45 ; lat. 0-95 poli. 



Hab. Isle of Luzon ; in sandy mud, six fathoms. 



Tellixa inornata. Tel. testd ovato-oblongd, subtenui, subventri- 

 cosd, impolitd, sub(BquilateraU, sordide albidd, epidermide tenui et 

 cinered indutd, Uevigatd ; marginis ventralis parte medid rectd aut 

 subretusd; dorsalis parte anticd convexiusculd et paululum declivi, 

 parte posticd subdeclivi ; extremitate anticd rotundatd, posticd 

 attenuito-rotundatd ;fexurd, costdąue umbonali, obsoletis ; dentibus 

 lateralibus nullis. Long. 0-82 ; lat. 1-30. 



Hab. Conception, Chili ; soft mud, six fathoms. 



A fossil-like shell, which is devoid of striking characteristics, and 

 much resembles an elongated Edentula. 



Tellina cygnus. Tel. testd ovatd aut ovato-oblongd, solidiusculd, 

 subaguilaterali, convexd, extus nitidd, intusgue candidd, concentrice 

 substriatd ; margine ventrali convexiusculo ; dorsali antice sub- 

 recto et paululum declivi, postice recto et valde declivi ; extremi- 

 tate anticd rotundatoobtusd, posticd cuneiformi, subrostratd; 

 flexurd ventrali distinctd ; ligamento infosso ; superficie internd 

 submargaritaced ; dentibus lateralibus nullis. Long. 0"40 ; lat. 

 0-63 poli. 



Hub. Bias, isle of Negros ; coral sand, seven fathoms. 



Closely resembling corbuloides in shape, but narro\ver, possessing 

 distinct concentric strire, and devoid of lateral teeth. 



Tellina Dombei. Tel. testd obovatd, incequilateraU, solidd aut 

 solidiusculd, convexd aut subventricosd, impolitd, leevigatd, albidd, 

 natibus roseo tinctis ; margine ventrali subrecto ; dorsali antice 

 subdeclivi et convexo, postice subrecto satisque declivi ; extremitate 

 anticd rotundatd, posticd brevi, subangulatd ; ligamento infosso; 

 costd umbonali et flemird distinctis ; disco interno aurantio-roseo ; 

 dentibus lateralibus nullis. Long. T 60; lat. 2 poli. 



Hab. Panama ; twelve fathoms, sandy mud. 



Allied to the umbonella of Lamarck, but with the fold and flexure 

 more distinctly marked. 



