TELLINA.—Puater XXI. 
gonal, ovate, concentrically ridged, obscurely decus- 
sated with radiating lines; posterior side obtusely 
angular, obliquely truncated behind the angle, ros- 
trated in front of the angle, sinuated, with the ven- 
tral margin inflated in front of the sinus, dorsal mar- 
gin sloping, bent inwards, excavated, ligament imbed- 
ded, umboes inflated; anterior side sloping, exca- 
vated near the umboes, no lateral teeth. 
SOWERBY. 
Hab. 
= 
This magnificent shell has some resemblance to 7. ven- 
tricosa, from which it differs in being more trigonal and 
rostrated, with a swell in the ventral margin next to a large 
sinus. 

Species 110. (Mus. Taylor.) 
TeLuina CotumBiensis. el. testd oblonga, subovatd, 
albd, levissimd, epidermide subfuscd indutd, compressa, 
inequilaterali, margine ventrali @qualiter convewd ; 
latere postico breviore, subangustato, acuminato, angu- 
lato, post angulum subalato, umbonibus parvis, acutis ; 
latere antico oblongo, oblique inflato, dentibus cardi- 
nalibus minimis, dentibus lateralibus nullis. 
CotumBiaN TELLINA. Shell oblong, subovate, 
white, very smooth, covered with a brownish epider- 
mis, compressed, inequilateral, ventral margin equally 
‘THE 
convex; posterior side the shorter, rather narrow, 
acuminated, angular, rather alated behind the angle, 
umboes small, sharp ; anterior side oblong, obliquely 
inflated, cardinal teeth very small, lateral teeth none. 

Hantgy, Pro. Zool. Soc. 1844; Thes. Conch. pl. 65, 
f. 246. 
Hab. Monte Christi, West Columbia. 
Distinguished from Tellina magna by the absence of 
flexure at the posterior side, the want of a lateral tooth, 
and by the smallness of the cardinal teeth. 

Species 111. (Mus. Taylor.) 
TELLINA EPUIPPIUM. 
oblique retrorsa, ventricosissimd ; latere postico brevi, 
Tel. testa alba, subquadraté, alta, 
valde flecuosd, valvuld deatra costa acuta elevata radi- 
atd, ante angulum depressd, margine ventrali sursum 
acclivi, post angulum in alam productam expansd, val- 
vuld sinistrad arcuatim depressd, canali umbonali ad 
terminum angulatum radiata, umbonibus magnis, den- 
tibus cardinalibus parvis, dentibus lateralibus nullis. 
THE saADDLE TeLLINA. Shell white, subquadrate, ele- 
vated, obliquely sloping backwards, very flexuous ; 
posterior side short, the right valve rayed with a 
sharp, elevated rib, depressed in front of the angle, 
ventral margin sloping upwards, expanded behind the 
angle into a produced wing, left valve curved and de- 
pressed, rayed with an umbonal canal to the angular 
end, umboes large, cardinal teeth small, no lateral 
teeth. 
SPENGLER. 
Hab. Kast Indies. 
The posterior angle is elevated in one valve into an 
acute rib, and depressed in the other, so as to form a 
canal or groove. 

