CLASS PELECYPODA 
167 
Tellina panamaensis Dali, 1900. 
Proc. U. S. N. M., 23:319, pi. 3, fig. 3. 
Shell small, thin, ivory white, polished, rather compressed, flexuous 
behind, the anterior end much the longer, produced, and rounded, pos¬ 
terior end with the ligament rather deeply inset, margin obliquely descend¬ 
ing to a rather blunt point; surface smooth, or marked only by incremental 
lines, except near the basal margin, where there are a few incised lines 
with wider interspaces, not quite in harmony with the lines of growth; 
posterior dorsal area minutely concentrically rippled; hinge normal, deli¬ 
cate; pallial sinus large, not reaching the adductor, mostly confluent below; 
the elevated ray absent or obsolete. Length, 9; height, 5.25; diameter, 
2.5 mm. (Dali.) 
Type in U. S. N. M., No. 108557. Type locality, Panama Bay, U. 
S. Fish Com. Station 2799. 
Range. Catalina Island, California, to Panama. 
Tellina modesta Carpenter, 1864. 
Sup pi. Rep. Brit. Assoc., p. 639. Proc. Acad. Nat. Sci. Phila., 1865, p. 54. 
A. t. “A tenero” Sayii, simillima; sed callosutate conspicua interna 
antica ab umbonibus decurrente, sinum pallii et cicatricem adductorem 
utraque valva separante; parva, subdiaphana, nitidissima, donaciformi; 
epidermide cornea tenuissima, striulis incrementi, plus minusve conspicuis, 
induta; margine antico dorsali subplanato; umbonibus extantibus; area 
postica truncata, haud acute definita; margine subplanata; intus, dentibus 
cardinalibus utraque valva ii., quorum alternati bifidi; va; va sinistrali 
lat. antico curto, extante, contiguo, posticis nullii usque ad callosutatem 
porrecto; nymphis paulum concavis. Long. .36; lat. .22; alt. .08. (Car¬ 
penter.) 
Shell small, white, rather short, with a thick but obscurely defined ray 
behind the anterior adductor scar. (Dali.) 
Type locality, Puget Sound. 
Range. Vancouver Island to Lower California. 
Subgenus Oudardia Monterosato, 1884. 
Tellina buttoni Dali, 1900. 
Plate 44, figs. 7a, 7b. 
Proc. U. S. N. M., 23:324; pi. 4, figs. 12, 13 . 
Shell elongated, subequilateral, compressed, polished, white, rounded 
before, slightly shorter and pointed behind, with a slight flexuosity; 
surface finely concentrically grooved, with wider interspaces, the sculp¬ 
ture stronger on the right valve and anteriorly; beaks low, inconspicuous; 
interior polished, white, with a well-marked thickened ray behind the 
