160 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.37. 



rounded at the end; in front subtruncate; ventral edge rounded 

 behind, in front somewhat fiexuous; umbones bhickish; the internal 

 margins not crenate. 



There is no record as to the edibility of this species. 



TELLINA (ANGULUS) EBURNEA Hanley. 



Plate 28, fig. 3. 



Tellina eburnea Hanley , Proc. Zool. Soc. of London for 1844, p. 61; Mon. Tellina 

 in Thes. Conch., 1846, p. 241, pi. 58, fig. 91. 

 From the flats at Capon. 



Distribution. — Gulf of CaHfornia and southward to Paita, Peru. 



Shell small, oblong, compressed, opaque white, glossy, inequilateral, 

 with strong concentric sulci which usually are more feeble in one of 

 the valves ; and wliich become closer and the interspaces sublamellose 

 on passing the flattened area at the upper edge of the more convex 

 valve; posterior end shorter, subcuneiform, anterior edge straight, 

 then rounded down to the base; ligament short and prominent; fold 

 almost obsolete; inside pure white. 



An inconspicuous species, not known to have an}^ economic value. 



TAGELUS (MESOPLEURA) DOMBEYI Lamarck. 



Plate 27, fig. 3. 



Solen dombeii Lamarck, Anim. s. Vert., voL 5, 1818, p. 454; Encycl. M6th., 

 pi. 224, fig. 1. 

 Navaja. Taken in sand, under 3 or 4 feet of water, at Chilca Bay, Peru. Used as 

 food, but apparently does not occur abundantly. 



Distribution. — From the island of Chiloe northward to Tumbes, 

 Peru. 



Shell elongate, parallel-sided, the ends rounded; covered with a 

 dull olivaceous periostracum, wliite or purplish with an obsolete 

 wliiteray; beaks subcentral, the ends of the shell gaping slightly; the 

 base with its margin in the middle somewhat concave. Hinge with 

 two inconspicuous cardinal teeth. 



SEMELE SOLIDA Gray. 



Plate 28, fig. 10. 



Amphidesma solidum Gray, Spicilegia Zoologica, 1828, pi. 6, fig. 6. — Hupe, in 

 Gay, Hist, de Chile, vol. 8, 1854, p. 359, pi. 7, fig. 1. 

 Concha blanca. Bay of Chilca, 30 miles south of CuUao. 



Distribution. — Chonos Archipelago and northward to Callao, Peru. 



Shell thick, solid, suborbicular, compressed, with concentric 

 grooves and delicate radiating striae; somewhat wrinkled distally; a 

 touch of purple on the hinge margin; ligament internal; lunule 

 minute, lanceolate; cardinal teeth very slender. Not of economic 

 importance. 



