318 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxiii. 



beaks low, surface sculptured with close concentric ridges, thread-like 

 in front and over most of the disk, but behind and on the posterior 

 dorsal area becoming sharper and more lamellose; hinge normal, the 

 anterior right lateral conspicuous!}' large, a faint trace of a posterior 

 lateral in the same valve; pallial sinus nearly touching the anterior 

 adductor scar and wholl}^ confluent below; there is no trace of an ele- 

 vated internal ray. Lon. 12.5, alt. 6.2, diam. 3.5 mm. 



Type.—^o. 108560, U.S.N.M. ; dredged in 11 fathoms, sand, off Cape 

 Tepoca, Lower California, near the head of the Gulf, b}^ the U. S. 

 Fish Commission at station 3019. 



TELLINA (MOERELLA) PA.ZIANA new species. 

 (Plate III, fig. 8.) 



Shell small, thin, white, convex, the anterior end slightly longer, 

 rounded, the posterior end bluntly pointed; surface finely concentric- 

 ally sculptured b}' the incremental lines, covered with a very delicate 

 dehiscent pale straw-colored epidermis; hinge well developed, a minute 

 but distinct anterior left lateral present; interior polished, only about 

 half the lower portion of the pallial sinus confluent, the anterior part 

 not reaching the adductor. Lon. 10.2, alt. 7, diam. 3.5 mm. 



Ty^^e.— No. 108580, U.S.N.M. ; dredged in 26i fathoms, near La Paz, 

 Lower California, b}- the U. S. Fish Commission, at station 2823. 



This differs from the young of Scroh'culma mridotincta Carpenter, 

 which in outline it resembles, by being less polished, more inflated, and 

 without the deep-set resilium. 



TELLINA (ANGULUS) MACNEILII new species. 



(Plate III, fig. 7.) 



Shell small, solid, inequilateral, the anterior end longer, rounded, 

 the posterior end quite short, depressed, bluntly pointed; color deep 

 rosy, slightly zoned, and paler toward the basal margin; surface 

 closeh", sharply concentricall}^ striated, the posterior dorsal area 

 feebly imbricate, with a little obscure radial striulation; valves moder- 

 ately full, flatfish toward the middle of the disk; hinge strong, normal; 

 internal ray obscure; pallial sinus long, nearly reaching the anterior 

 adductor scar, wholly confluent below. Lon. 12.5, alt. 7.6, diam. 

 3.5 mm. 



Types. — No. 120660, U.S.N.M., obtained at Guavmas, Mexico, bv 

 W. H. Dall. 



The species is named in honor of a good collector, to whose efforts 

 we are indebted for a number of additions to the mollusk fauna of 

 Central America and ^Yest Mexico. 



