371 



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

 its dorsal edge convex and not greatly slo})ing ; posterior side termi- 

 nating in a short beak, which is ^^laced \a'rj 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 Burneti (pl.lviii. f. 99.) Broderiii^xASowerhy, 

 Zool. Join-, vol. 4. p. 363. t. 9. f. 3 ; Hani. Des. Cat. p. 73. t. 13. 

 f. 51. 



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

 quivaha, compressa, Candida, submargaritacea ; valvida planulata 

 lineis elevatis concentrice striata; valvula convexiore sulcis dila- 

 tatis concentricis obsoletissime antice et superne ornata ; margine 

 ventrali arcuato ; dorsali utrinque valde declivi et dentato, antice 

 valde incurvato, postice subrecto ; natibus acutissimis, antice in- 

 cumbentibus; ligamento minuno lunnlaque maxima infossis; 

 flexura distincta; dentibus lateralibus distiuctis, subsequidistan- 

 tibus. 



Triangular, rather tliin, inequivalve, subequilateral, compressed, 

 subnacreous, white ; the convex valve with obsolete distant dilated 

 concentric grooves, which are most visible in front and towards 

 the elevated acute and curving beaks (one of wliich projects over 

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

 close concentric striae, wliich become obsolete posteriorly ; ventral 

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

 armed with large tooth-like projections, the front one greatly 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. Tellina lyra (pi. Ixii. f. 1^1 .)Hanlei/, Zool. Proc. 1844. 



T. testa elliptica, 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 horizontali 

 aut leviter acclivi ; latere antico paululum longiore, rotundato ; 

 extremitate postica obtusa; hgaraento infosso; natibus acutis, 

 prominentibus, incumbentibus ; flexm-a obsoleta ; dentibus latera- 

 libus distiuctis, antico approximate, postico parvo, remotiore. 



3 s 



