TELLINA.—Prarr XXXIII. 
small, spinous projections ; in front they are sloped round 
to meet the dorsal margin, which is short. 
TELLINA PLANULATA, 
THE 

Species 186. (Mus. Taylor.) 
Tel. testé oblonga, ovato-subtri- 
goni, compressa, complanatd, solidd, alba, regulariter 
concentric sulcatd, medio subflecuoso; latere postico 
angulato, margine dorsali recto, declivi, elongato, 
termino oblique truncato, infra acuminato, liganiento 
elongato, prominente, margine ventrali recto; latere 
antico oblongo, prope marginem dorsalem radiatin 
unpresso, margine terminali emarginato, margine dor- 
sali valvule sinistre utringue super alteram deflexo. 
PLANULATED TELLINA. Shell oblong, ovate-sub- 
trigonal, compressed, flattened, solid, white, regu- 
larly concentrically grooved, subflexuous in the 
middle ; posterior side angular, with dorsal margin 
straight, sloped, long, end obliquely truncated, acu- 
minated below, ligament elongated, prominent, ven- 
tral margin straight ; anterior side oblong, radiately 
impressed near the dorsal margin, terminal margin 
notched, dorsal margin of left valve on both sides 
folded down over the other. 
SOWERBY. 
Hab. 
A 

? 
much larger and flatter shell than Zellina eburnea, 

with 
closer grooves and no transverse ridges on the dor- 
sal margin of the overlapping valve. 
TELLINA IMPRESSA. 
THE 

Species 187. (Mus. Sowerby.) 
Tel. testé alba, solidd, subquadra- 
tim ovatd, tenuissimé radiatim striatd, concentricé 
creberrimé liratd ; latere postico elevatim angulato, 
brevi, margine dorsali valde declivi, termino truncato, 
margine ventrali sursum acclivi, ared postangulari 
angustd, flecurd ante angulum mediocri ; latere antico 
inflato, oblique producto, margine dorsali prope um- 
bones ared subexcavaté impresso, umbonibus elevatis, 
retror'sis. 
IMPRESSED TELLINA. Shell white, solid, squarish 
oval, very finely radiately striated, concentrically 
very closely ridged; posterior side with a raised 
angle, short, with dorsal margin much sloped, end 
truncated, ventral margin sloped upwards, postan- 
gular area narrow, flexure in front of angle mode- 
rate ; anterior side inflated, obliquely produced, dor- 
sal margin near the umboes impressed with a 
slightly excavated area, umboes elevated, leaning 
backwards. 
SOWERBY. 
Hab. 
P) 


