482 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
before it; right valve with two cardinals, the hinder bifid; interior white, often salmon tinted or 
yellowish; pallial sinus bluntly rounded in front, high under the beaks. 
Length, 35; height, 18; diameter, 10 mm. 
Playa de Ponce; San Juan; Aguadilla, Porto Rico. It ranges from New Jersey south to Rio de 
Janeiro. 
Macoma tageliformis Dali. Plate 55, figs. 10, 11, 15. 
Macoma tageliformis Dali, Proc. U. S. Nat. Mus., xxm, p. 300, 1900. 
Shell oblong, solid, subrhomboid; dorsal and ventral lines nearly parallel; posterior end with a 
straight truncation above, which is bounded on each side by a well-defined ridge forming a sort of 
escutcheon behind; posterior basal part rounded; surface with close, irregular growth lines, whitish, 
rather dull; left valve with a bifid anterior cardinal and a compressed one behind it; right valve with 
two nearly equal cardinals, the hinder bifid; nymphs feeble with a ridge on their outer edges; pallial 
sinus rounded above under the beaks; interior white, never tinted. 
Length, 46; height, 28; diameter, 13 mm. 
Mayaguez, Porto Rico, one shell. Found also on the coast of Texas. 
Differs from M. brevifrons in being heavier, higher in proportion, in having a straighter truncation, 
and in the pallial sinus, which is not carried up almost to a point under the beaks, as in that species. 
In M. brevifrons the posterior end is more attenuated. 
Genus STRIGILLA Turton, 1822. 
Shell suborbicular, the surface separated into two or three differently sculptured areas in which 
the ridges are divergent or convergent; posterior end not flexed; hinge as in Tellina; two laterals in 
each valve; pallial sinus angular, deep, coalescent below with the pallial line. 
Strigilla carnaria Linnaeus. Plate 58, fig. 3. 
Tellina carnaria Linnseus, Syst. Nat., ed. x, p. 676, 1758. 
Strigilla carnaria Turton, Dithyra Brit,, p. 117, pi. vii, fig. 15, 1822. 
Aguadilla; Quebradillas, Porto Rico (Gundlach). 
It is possible that the specimens which Gundlach believed to be this are the next species. In 
S. carnaria the upper line of the pallial sinus connects the two adductor scars and is wholly 
coalescent below. 
Strigilla rombergi Morel i. Plate 58, fig. 2. 
Strigilla rombergi Morch, Yoldi Cat,, ii, p. 15, 1853. 
Very young specimens from San Juan are probably this species, in which the pallial sinus does 
not reach the adductor in front. 
Strigilla flexuosa Say. 
Tellina flexuosa Say, Journ. Acad. Nat. Sci. Phila., n,p. 303,1822; Hanley, Thes. Conch., p. 261, pi. Lvi.figs. 28,29, 1846. 
Shell small, short-oval, inflated, rather solid; beaks high, nearer the anterior end; the surface is 
covered with fine, low ribs which run obliquely and fiexuously from the anterior end forward and 
downward to the low posterior ridge; behind the ridge they are zigzagged to the hinder end of the 
shell; left valve with two cardinals, the anterior erect, strong, slightly bifid, the posterior small and 
oblique, with two laterals; right valve with two cardinals, the posterior strong and somewhat bifid, 
and two strong laterals. Color whitish, cream or lemon yellow. 
Length, 11; height, 10; diameter, 6.5 mm. 
San Juan Harbor, Porto Rico, two young specimens. 
Strigilla pisiformis Linnseus. 
Tellina pisiformis LinnEeus, Syst. Nat., ed. X, p. 677, 1758; Hanley, Thes. Conch, p. 261, pi. lvi, fig. 30, 1846. 
Shell small, short-oval, somewhat inflated, rather solid; beaks high, nearer to the anterior end, 
with a distinct lunule in front of them; surface sculptured with fine, low, flexuous ridges running 
obliquely from the anterior end downward and backward to the low posterior ridge; at that line they 
are diverted sharply upward and slightly backward, and near edge of shell they are again turned 
sharply, passing downward and curving out to hinder edge of shell. The series of upturned ridges 
just back of the posterior ridge is finer than the others; hinder series rather coarse and somewhat 
corrugated; left valve with an erect, bifid cardinal and a small tooth behind it; right valve with two 
cardinals; two laterals in each valve. Color pinkish, the umbonal region and cavity of shell red. 
Length, 9, height, 8; diameter, 5 mm. 
Aguadilla; San Juan Harbor, Porto Rico. 
