TELLINA.—Prate XXVIII. 
angusto ; latere antico expanso, inflato, rotundato, um- 
bonibus retrorsis, ligamento infosso. 
Toe CAYENNE TeLLiINa. Shell thin, inflated, subtri- 
gonal, elevated,.white, striated ; posterior side rather 
compressed, cuneate, with obtuse radiating angle, 
flexure strong, dorsal margin sloping, ventral margin 
sloping upwards, terminal margin obliquely trun- 
cated, postangular area narrow; anterior side ex- 
panded, inflated, rounded, umboes bent backwards, 
ligament imbedded. 
Lamarck (Psammobia), No. 11. 
Tellina constricta, Philippi. 
Tellina interstriata, Say. 
Hab. Guiana, Mexico, Florida. 
Resembling Zellina cuneata in the great inequality of 
the sides. It is, however, a more oval and thinner shell. 

Species 153. (Mus. Sowerby.) 
TELLINA EDENTULA. Tel. testa subovatd, sordidé albd, 
striata ; latere postico valde flecuoso, angulo radianti 
obscuro, area postangulari convead, margine dorsali 
declivi, termino subtruncato, sinuoso; latere antico 
subinflato, longiusculo, margine dorsali oblique convexo, 
umbonibus retrorsis, ligamento subinfosso, margine car- 
dinali dentibus centralibus parvis, lateralibus nullis. 
THE EDENTULATE TeLuina. Shell subovate, dull white, 
striated; posterior side strongly flexuous, with ob- 
scure radiating angle, postangular area convex, with 
dorsal margin sloping, end subtruncated, sinuous . 
anterior side somewhat inflated, rather longer, dorsal 
margin obliquely convex, umboes sloping backwards, 

ligament partly imbedded, hinge margin with small 
central and no lateral teeth. 
Broperre and Sowersy, Zool. Journ. vol. iv. p. 363. 
Hab. Behring’s Straits. 
The form of this species easily distinguishes it from 
others resembling it in general aspect. 

Species 154. (Mus. Taylor.) 
TELLINA BREVIROSTRATA. 
formi, concentricé striatd, prope umbones et medium 
Tel. testa compressa, subpyri- 
vivide roseo, ad marginem ventralem late alba ; latere 
postico breviusculo, attenuato, profundé flexuoso, ros- 
trato, angulo radianti obtuso, post angulum depresso, 
margine dorsali depresso, prope umbones excavato, ter- 
mino truncato, margine ventrali ante angulum con- 
tracto ; latere antico oblongo, margine dorsali elevato, 
rectiusculo, margine ventrali rotundo, umbonibus par- 
vis, acutis, retrorsis. 
SHORT-BEAKED TELLINA. Shell compressed, sub- 
pyriform, concentrically striated, bright rose near the 
umboes and in the centre, white for some width at 
the ventral margin; posterior side rather short, at- 
THE 
tenuated, deeply flexuous, beaked, with the radiating 
angle obtuse, depressed behind the angle, dorsal mar- 
gin depressed, excavated near the umboes, end trun- 
cated, ventral margin contracted in front of the angle ; 
anterior side oblong, with dorsal margin elevated, ra- 
ther straight, ventral margin rounded, umboes small, 
sharp, sloping backwards. 
SOWERBY. 
Hab. St. Blas. 
The valves of this beautiful species are equally striated. 

