DALL: MOLLUSCA AND BRACHIOPODA. 387 
base at a bluntly rounded angle, the base being nearly straight and the whole 
profile of the shell subrectangular ; interior translucent whitish, scars perceptible, 
the pallial sinus shallow, rounded in front; hinge plate straight with about four- 
teen anterior and over thirty very small anterior teeth, the gap separating the 
two series very slight. Lon. of shell, 13.0; of beaks behind the anterior end, 
5.5; alt. 8.0; diam. 5.0 mm. 
U.S. 8. “ Albatross,” station 3360, Gulf of Panama, in 1672 fathoms, sand, 
bottom temperature 42°F. U.S. N. Mus. 122,908. Also off the coast of 
Keuador, at station 2793, in 741 fathoms, mud, temperature 38°.4 F. 
TINDARIA Berwuarpi. 
Tindaria compressa Da tt, n. sp. 
Plate 15, figures 7, 8; Plate 17, figures 15, 16. 
Shell small, thin, cythereiform, pale yellow, moderately convex, inequilateral, the 
anterior end shorter, the entire surface minutely, evenly, concentrically striated; 
beaks low, prosocoelous, with no defined lunule but a flattish space in front of 
them; ligament small, amphidetic; posterior slope slightly arcuate, with a long 
lanceolate escutcheon, defined by an impressed line; anterior and posterior ends 
rounded, base evenly arcuate; interior white, porcellanous; hinge with about ten 
anterior and twenty-one posterior teeth, a rather wide mesial gap, between the 
two series; basal margin entire. Lon. 8.2; height, 6.0; max. diam. 4.3; beaks 
behind the anterior end, 3.0 mm. 
U.S. 8. “ Albatross,” station 3360, in 1672 fathoms, sand, bottom temperature 
42°F. U.S. N. Mus. 122,921. 
A larger specimen of the same species, but with twelve anterior and twenty- 
five posterior teeth, measures: lon. 11.5; alt. 8.5; diam. 6.0; and the beaks 
behind the anterior end, 4.7 mm. It was dredged at station 3414, southwest of 
the isthmus of Tehuantepec, in 2232 fathoms, green mud, bottom temperature 
38°.5 F. U.S. N. Mus. 122,928. 
This species recalls Tindaria amabilis Dall, of the Antilles, by its form and 
color, but it is less solid and inflated, and more attenuatedly compressed behind. 
In the former species the ligament is nearly equally. distributed in front of and 
behind the beaks, but in 7. compressa the larger part is posterior. 
? 
Tindaria salaria Datt, n. sp. 
Shell pale cream color or white, nuculiform, smooth on the beaks, near the dor- 
sal slopes and ends of the shell; basally concentrically striated, polished; the shell 
is very nearly the shape of a small Nucula proxima Say; ligament small, amphi- 
detic, mostly posterior; resilium obsolete or none; there is no trace of a chondro- 
phore; hinge line arched, with no lunule, the escutcheon narrow, long, feebly 
defined ; interior white, porcellanous, polished; pallial line not sinuated, margins 
