1916. ] H. B. Preston: Andaman Marine Mollusca. 97 
margin anteriorly gently arched, markedly excavated in the liga- 
mental region and sloping posteriorly ; ventral margin scarcely 
rounded; anterior side rounded; posterior side comparatively 
short, abruptly descending, rounded below. 
Long. 4°75, lat. 8°25 mm. 
Hab.—Semiramis Bay, Andaman Is., in 2-6 fathoms, on a 
bottom of fine mud (S. Kemp). 
Tellina phoenicensis, sp. n. 
(Figs. 14, 144.) 
Shell small, ovately cuneiform, milk white, both valves sculp- 
tured with moderately fine, concentric ridges which stand out 
somewhat along the upper portion of the posterior, dorsal margin, 
the interstices being occupied by very fine, miscroscopic, con- 
centric striae; umbones small, rather prominent; dorsal margin 

Fic, 13.—Tellina pervitrea, sp. n. X 3. Fic. 15.—Tellina soror, sp. n. X 3- 
5 14.—Tellina phoentcensts, sp.n. X 4. », 15a.— do., hinge, X 3. 
5» 14a.— do., hinge, X 4. », 16.—Tellina unguts, sp.n. X 4. 
anteriorly, very slightly sloping, posteriorly sloping, faintly ex- 
cavated above then a little bulging; ventral margin rounded an- 
teriorly, contracted posteriorly, anterior side bluntly rounded ; 
posterior side produced, subrostrate, sharply rounded. 
Long. 5, lat. 85 mm. 
Hab.—Phoenix Bay, Andaman Islands, in 1-3 fathoms, on a 
muddy bottom (S. Kemp). 
Tellina soror, sp. n. 
(Figs. 15, 154.) 
Shell allied to T. phoenicensis but larger and of a thinner and 
semi-transparent texture, the concentric ridges are lacking and 
are replaced by very fine and closely-set striae only; the ventral 
margin is not posteriorly contracted; the anterior side is still 
more obtusely rounded, and the posterior side is neither unduly 
produced nor rostrate. 
