NO. 1210. SYNOPSIS OF NORTH AMERICAN TELLINID^:— BALL. 319 



TELLINA (ANGULUS) SUFFUSA new species. 



(Plate III, fig. 10.) 



Shell cuneate, very thin, convex, blunt in front, pointed behind, 

 the posterior end slighth' longer, pinkish, yellowish, or translucent 

 white in color; surface rather strongly, closely, and irregularl}' con- 

 centrically striate, with an unusually large and wide lunular impres- 

 sion, but no escutcheon to speak of; hinge normal, delicate; interior 

 polished; the pallial sinus high, well separated from the anterior 

 adductor, though there seems to be no trace of a ra}- in the specimens 

 examined. Lon. 13.5, alt. 9.2, diam. 1.7 mm. 



TyjJe. — No. 105512, U.S.N.M., collected at San Ignacio Lagoon, 

 Lower California, b}' Henry Hemphill. 



This little species is quite characteristic; the unusually large lunule 

 and shorter anterior end are especially notal^le. 



TELLINA (ANGULUS) CERROSIANA new species. 

 (Plate III, fig. 11.) 



Shell minute, compressed, greenish white, the anterior end longer, 

 the surface sharply concentrically sculptured with low, thread-like 

 lamella? less close over the posterior dorsal area; left valve with a 

 rather marked sulcus extending from the beak to the posterior angle; 

 hinge normal, strong for the size of the shell; pallial sinus elongated, 

 conHuent below, nearly reaching the adductor. Lon. 5.2, alt. 3.2. 

 diam. 1.5 mm. 



Types. — No. 151957, U.S.N.M., dredged off Cerros Island, Lower 

 California, in 9-10 fathoms, l)y the U. S. Fish Commission. 



These little shells may not be adult, but if so thej' nevertheless do 

 not agree with the young of any of the other species from this vicinity 

 so far obtained 



TELLINA (ANGULUS) PANAMENSIS new species. 

 (Plate III, 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 oblicj[uely 

 descending to a rather blunt point; surface smooth or marked onh^ h\ 

 incremental lines, except near the basal margin, where there are a few 

 incised lines with wider interspaces, not quite in harmon}' with the 

 lines of growth; posterior dorsal area minutely concentrically rippled; 

 hinge normal, delicate; pallial sinus large,, not reaching the adductor, 

 mostly confluent below; the elevated ra}^ absent or obsolete. Lon. 9, 

 alt. 5.25, diam. 2.5 mm. 



