TELLINA.—P ate XXIII. 
This flat little shell somewhat resembles YZellina evilis 
in form, but the oblique grooves on the surface and the 
concentric ridges on the postangular area give it quite 
another character, independently of the colour. 

Species 123. (Mus. Sowerby.) 
THLLINA LoNGTRosTRATA. el. testd oblique subtrigond, 
alba, laminis minutis numerosis concentricis liratd ; 
latere postico subproducto, acuminato, rostrato, angu- 
lato, post angulum canalifero, ante angulwm et versus 
medium bifleanoso, margine dorsali complanato, subex- 
cavato; latere antico oblique ventricoso, expanso, 
margine ventrali flexuoso, margine dorsali prope um- 
bonem subexcavato, umbonibus acuminatis. 
LONG-BEAKED TELLINA. Shell obliquely subtri- 
gonal, white, ridged with minute, numerous, con- 
THE 
centric laminze ; posterior side rather produced, acu- 
minated, rostrated, angular, with a canal behind the 
angle, and two flexures in front of the angle and 
towards the middle, dorsal margin flattened and 
subexcavated ; anterior side obliquely ventricose, ex- 
panded, ventral margin flexuous, dorsal margin ex- 
cavate near the umboes, umboes acuminate. 
SOWERBY. 
Hab. ? 

Of the Z. ostracea form, but more transverse, with a 

more produced beak, and a double flexure. The concen- 
tric ridges are fine, close, and laminar. 

Species 124. (Mus. Taylor.) 
TELLINA OSTRACEA. 
press, laminatim concentricé liratd, liris ad latera 
inequalibus ; lalere postico oblique bicostato, inter 
costas profunde canaliculato, termino angulato, mar- 
Tel. testd subtrigond, albd, com- 
gine dorsali declivi, planato, concavo, margine ventrali 
ad angulum coste subcontracto, sursim acelivi ; la- 
tere antico expanso, subventricoso, margine dorsali de- 
clivi, dentibus lateralibus nullis. 
Tue ostRaceous TEeLiIna. Shell subtrigonal, white, 
compressed, laminately concentrically ridged, ridges 
unequal at the sides; posterior side obliquely double- 
ribbed, with a deep canal between the ribs, end 
angular, dorsal margin sloping, flattened, concave, 
ventral margin contracted at the angle of the rib, 
sloping upwards; anterior side expanded, subven- 
tricose, dorsal margiu sloping, no lateral teeth. 
Haney, Deser. Cat. p. 71. pl. 14. f. 11. 
Hab. Ceylon. 
The specimens vary in the regularity of the laminated 
striae. The specimen figured in ‘ Thesaurus ’ and our smaller 
figure here represents the most typical characters in that 
respect. 
