from the Gulf of California, etc. 399 
Inhabits Panama. Col. Jewett. 
There is no species figured in Sowerby’s Thesaurus, nor de- 
scribed by Prof. Adams, which bears any near resemblance to this. 
It is remarkable for its symmetrical form and great simplicity. 
TELLINA GEMMA (Pl. XVI. Fig. 5.) 
T. parva, inequilateralis, transversa, ovato-triangularis, striis rotundatis con- 
centricis ordinatis insculpta, rosea, albido vix radiata ; latere antico semiovali, 
superné acutè rotundato ; latere postico breviore flexuoso, sub-triangulari ; 
flexurá valde acutá; margine ventrali postice incurvo; intus vivide rosea. 
Shell very small, inequilateral, transverse, triangular elliptic, 
rather solid, sculptured with crowded, rounded, concentric stris, 
which become somewhat lamellar posteriorly ; rose-colored, with a 
few delicate radiating white pencils; apex about one fifth behind 
the middle ; anterior part semi-oval, the dorsal outline rectilinear and 
the extremity more abruptly rounded above than below ; posterior 
Portion subtriangular, flexuous, the dorsal margin somewhat con- 
vex, tip truncate ; the submarginal fold well marked, and defined 
by a sharp angular ridge on the right valve; ventral margin in- 
curved posteriorly ; interior bright rose red. 
Diameters, longitudinal, three fifths of an inch; vertical three 
tenths of an inch; transverse three twentieths of an inch. 
Inhabits San Juan. Lieut, Green. 
The species which it resembles somewhat in form and color are 
T. distorta, rhomboidea, and more especially T. scalpellum, which 
1s pellucid, shining, and nearly destitute of flexure. 
TELLINA (STRIGILLA) FUCATA (PLXVI. Fig. 4.) 
T. (Strigilla) fucata, Gould; Proc. B. S. N. H. Nov. 1851. IV. 91. 
T. lenticularis, rotundata, ovato-trigona. T. carnarie simillima, albida, rosa- 
-— .onata, sulcis ad declivitates umbonales angulatis arata; intus ommino 
miniata, 
Shell of a subcircular or ovate trigonal lenticular form, inequi- 
lateral, whitish, or roseate zoned and tipped with color more intense, 
and with a pale ray on the anterior slope in the darker specimens ; 
the surface furrowed with oblique striæ, flexed at nearly right angles 
— of the umbonal slopes; interior deep carmine red | 
