271 



arcuated ; anterior side much the longer, rather dilated, rounded, 

 its dorsal edge convex and not greatly sloping ; posterior side termi- 

 nating in a short beak, which is placed very high up owing to the 

 shortness and small slope of the incurved dorsal edge ; fold pro- 

 minent ; ligament minute and sunken ; beaks acute ; inside wliite ; 



lateral teeth distinct, subequidistant. 

 St. Elena, West Columbia. / / ^'- , 



90. Tellina Buuneti (pl.lviii. f. 99.) Broderip and Sowerb^, 

 Zool. Jour. vol. 4. p. 363. t. 9. f. 2 ; Hani. Des. Cat. p. 72. 1. 13. 

 f.51. 



T. testa trigona, suborbiculari, subtenui, subsequilaterali, inae- 

 quivalvi, compressa, Candida, suljmargaritacea ; valvula planulata 

 lineis elevatis concentrice striata; valvula convexiore sulcis dila- 

 tatis concentricis obsoletissime autice et superne omata ; margine 

 ventrali arcuato ; dorsali utrinque valde declivi et dentato, antice 

 valde incurvato, postice sub recto ; natibus acutissimis, antice in- 

 cumbentibus; Hgamento minimo lunulaque maxima infossis; 

 flexura distincta; dentibus lateralibus distinctis, subsequidistan- 

 tibus. 



Triangular, rather tliin, inequivalve, subequilateral, compressed, 

 subnacreous, wliite ; the convex valve with obsolete distant dilated 

 concentric grooves, which are most visible in front and towards 

 the elevated acute and ciu-ving beaks (one of wliich projects over 

 the other) ; the flat valve with elevated fine rather irregular and 

 close concentric striae, which become obsolete posteriorly; ventral 

 edge arcuated ; dorsal edges strongly sloping on either side, and 

 armed with large tooth-Kke projections, the front one gi'eatly in- 

 curved, the hinder nearly straight ; ligament minute ; dorsal slopes 

 excavated ; fold and flexure distinct ; lateral teeth distinct, rather 

 remote, and subequidistant. 



Salango, W. Columbia. 



91. Tellixa lyea (pi. kii. f. ISl. )IIanle^, Zool. Proc. 1844. 



T. testa eUiptica, tenui, compressa, nitidiuscula, intus extusque 

 alba, striis concentricis elevatis ornata; striis antice et inferne 

 confertioribus, interstitiis Isevigatis ; margine ventrali medio con- 

 vexiusculo, utrinque arcuato; dorsali postice elevatiore convexo 

 satisque declivi, antice prope lunulam excavatam, aut horizontal! 

 aut leviter accli\i; latere antico paididum longiore, rotundato; 

 extremitate postica obtusa; ligamento infosso; natibus acutis, 

 promineutibus, incmnbentibus ; flexm-a obsoleta ; dentibus latera- 

 libus distinctis, antico approximate, postico parvo, remotiore. 



