222 



be mistaken for Tellinse, but these being always perfectly equivalve, 

 strong, wedge-shaped, or triangular shells, with a remarkably short 

 prominent ligament, and the anterior side the more compressed, 

 present a combination of characters which are never united in any 

 of those Tellens in which the characteristic fold is imperfectly de- 

 veloped. The decided sinuation of the palleal scar suffices to 

 separate any species from Lucina, Corbis, or Astarte. 



DESCRIPTION. 



* Two lateral teeth in one of the valves. 



1. Tellina rostrata (pi. lxi. f. 157.) Lin., Syst. 1118 ; Lin. 

 Mus. Ulr. 481 ; T. Spengleri, Chem. vol. vi. f. 88, 89 ; Wood, Gen. 

 Conch, t. 37. f. 2 ■ Lam. no. 8 ; Haul. Des. Cat. p. 62. t. 4. f. 35 ; 

 Enc. Meth. t. 287. f. 5. 



T. testa elongato-subtrigona, angusta, subinsequivalvi, subrequi- 

 laterali, solida, convexiuscula, subfiexuosa, extus intusque Candida, 

 prope nates roseo pallide picta, concentrice sulcata ; sulcis confertis, 

 obliquis; margine ventrali subrecto aut convexiusculo ; dorsali 

 utrinque subrecto et subsequaliter declivi; areis dorsalibus sub- 

 lsevigatis, squamis tuberculosis, utrinque dentatis; latere antico 

 subacuminato ; postico subrostrato, biangulato; costa umbonali 

 angulata ; hgamento subinfosso ; dentibus laterahbus magnis, re- 

 motis. 



Elongated-subtriangular, narrow, rather flexuous, almost equi- 

 lateral, rather inequivalve, solid, moderately convex, white both 

 externally and internally, with a slight tinge of rose-colour near 

 the beaks, closely and obliquely grooved concentrically; ventral 

 edge but little convex ; dorsal margins nearly straight, and almost 

 equally sloping ; dorsal areas nearly smooth, and environed by scaly 

 tubercles ; anterior side subacuminated ; posterior biangulated and 

 subrostrated ; umbonal ridge angulated ; ligament sunken ; lateral 

 teeth strong and distant. 



Island of Ticao, &c, 



This is not the Rostrata of Gmelin, Lamarck, nor the majority 

 of writers, but nevertheless, as was surmised by Schumacher from 

 the expression " ano rimaque, subserratis," is the species indicated 

 by Linnfeus, as his specimen in the Linnsean Society's cabinet 

 clearly evidences. 



