Po TN AY. 
Prats XII. 
Species 51. (Mus. Sowerby.) 
TELuIna acuminata. el. testd compressd, oblonga, sub- 
trigond, alba ; latere postico leviter biangulato, elonga- 
to, acuminato, margine dorsali declivi, margine ven- 
trali sursum acclivi; latere antico breviusculo, anticeé 
suleis tribus inconspicuis radiato, termino vie emar- 
ginato, margine dorsali rotundo, margine ventrali 
recto, ligaimento parvo, infosso, dentibus lateralibus 
nullis. 
THE AcUMINATED TxELLINA. Shell compressed, oblong, 
subtrigonal, white ; posterior side with a slight double 
angle, elongated, acuminated, dorsal margin sloping, 
ventral margin sloping upwards ; anterior side rather 
short, rayed in front with three slight grooves, 
scarcely emarginated at the end, dorsal margin 
rounded, ventral margin straight, ligament small, 
imbedded, no lateral teeth. 
HaNnuEy, Thes. Conch., Tellina, n. 139. 
Hab, ——? 
The elongated, subtrigonal form of the posterior side of 
this shell gives it a peculiar appearance, and distinguishes 
it from every other species. 

Species 52. (Mus. Sowerby.) 
TELLINA ALTERNATA. Tel. testd subcomplanatd, subtri- 
gond, solidd, rosed vel albd, subequilaterd, concentric? 
sulcatd, suleis prope angulum posticum alternatim in- 
terruptis ; latere postico angulato, acuminato, termino 
truncato, margine dorsali declivi, recto ; latere antico 
semiovali, margine dorsali subdeclivi, ligamento elon- 
gato, intus dente laterali uno, postico remoto. 
THE ALTERNATED TELLINA. Shell subcomplanated, sub- 
trigonal, solid, rose-coloured or white, nearly equi- 
lateral, concentrically grooved, the grooves alter- 
nately interrupted near the posterior angle ; posterior 
side angular, acuminated, truncated at the end, dor- 
sal margin sloping, smooth ; anterior side semioval, 
dorsal margin slightly sloping, ligament elongated, 
one remote posterior lateral tooth within. 
Say, Journ. Ac. Phil. vol. ii. p. 275. 
Hab. South Carolina. 

The grooves are closer than in 7. ebwrnea, and some of 
them terminate short of the posterior ridge. 

Species 53. (Mus. Sowerby.) 
TELLINA PUNICEA. 
planatd, solida, roseo-subpurpurascenti, equaliter con- 
Tel. testa ovali-subtrigond, subcom- 
centricé sulcatd, subequilaterali ; latere postico, subtri- 
gono, angulato, breviter subtruncato, margine dorsal 
declivi, margine ventrali sursum acclivi, ared post- 
angulari planatd ; latere antico semiovali, anticé uni- 
suleato, termino emarginato, margine ventrali medio 
recto, umbonibus vivide rubris, ligamento area de- 
pressd, complanata. 
THE SCARLET TELLINA. Shell ovate-trigonal, somewhat 
flattened, solid, purplish-rose, equally concentrically 
grooved, subequilateral; posterior side subtrigonal, 
angulated, shortly subtruncated, with dorsal margin 
sloping, ventral margin sloping upwards, postangular 
area flattened, anterior side semioval, with one 
groove in front, the end emarginated, ventral mar- 
gin straight in the centre, umboes bright-red, area 
of the ligament depressed, flattened. 
Born, Ind. Ces. p. 33. t. 2. f. 2. 
Hab. Xipixapi, W. Columbia; in sandy mud, ten fathoms ; 
H. Cuming. 
The indentation of the front margin at the termination 
of a radiating groove, distinguishes this species from its 
allies. 

Species 54. (Mus. Sowerby.) 
TELLINA CHLOROLEUCA. el. testd aurantid, albo late 
radiata, sublevigatd, minute concentricé striatd, ro- 
tundato-subovali, equivalvi, inequilaterali, obliqua, 
postice sinuatim arcuatd ; latere postico brevi, angu- 
lato, margine dorsali valde declivi, termino acumt= 
nato, margine ventrali sursum acclivi ; latere antico 
obliquo, lato, rotundato, margine dorsali declivi, mar- 
gine ventrali antice inflato, ligamento infosso, dente 
laterali brevi. 
November, 1866. 
