ART. 18 SMALL, SHELLS DREDGED BY "ALBATROSS^' DALL 9 



beaks inconspicuous, slightly nearer the posterior end, the surface 

 dull, rarely with a few concentric markings; the resilifer minute, the 

 hinge with 14 anterior and about 7 posterior teeth. Length, 4 ; height, 

 2.25; diameter, 1.5 mm. U. S. Nat. Mus. Cat. No. 108190. 



Off Fernandina, rather common. 



The shell is close to L. hehes E. A. Smith, from near Culebra Island, 

 which has the posterior end longer than the anterior and wants the 

 flexure in front of the rostrum. 



LEDA ASPECTA, new name 



Ledella parva Vebrill and Bush, Amer. Journ. Sci., vol. 3, p. 54, fig. 18, Jan., 

 1897; Proc. U. S. Nat. Mus., vol. 20, No. 1139, p. 857, pi. 81, fig. 1, 1898. 



Off Georgia and Fernandina, numerous specimens. Off Marthas 

 Vineyard in 525 fathoms, Verrill. 



There is no defined escutcheon. Not. L. parva Sowerby, 1833. 



LEDA BIPENNIS, new species 



Shell small, smooth, not flexed behind, the beaks inconspicuous, 

 the anterior end rounded, the basal margin nearly straight, the pos- 

 terior slope longer, descending to a subtruncate end of the shell 

 resilifer minute, not projecting, teeth about 10 on each side of it 

 there is no indication of an escutcheon. Length, 4.5; height, 3 

 diameter, 2.1 mm. U. S. Nat. Mus. Cat. No. 108187. 



Off Fernandina, rare. 



Genus YOLDIELLA Verrill and Bush 



YOLDIELLA PYGMAEA Munster 



Nucula pygmaea Munster in Goldfuss, Petr. Germ., vol. 2, p. 157, pi. 125, 



fig. 17, 1842. 

 Leda pygmaea Orbigny, Prodr. Pal., vol. 2, p. 378, 1852. 

 Leda (Portlandia) pygmaea Hanley, Mon. Nuculidae (in Sowerby, Thes, 



Conch.), p. 41, pi. 2, figs. 26, 27, 1860. 



Off Fernandina, rather common. 



There seems to be some difference of opinion as to whether the 

 recent shell is identical with Miinster's fossil form, but at any rate 

 the present species has been identified with the latter by Hanley, 

 Jeffreys, and Marshall, as indicated by specimens received from 

 them. 



YOLDIELLA FRATERNA Verrill and Bush 



Yoldiella fraterna Verrill and Bush, Proc. U. S. Nat. Mus., vol. 20, No. 

 1139, p. 867, pi. 80, fig. 5; pi. 82, fig. 8, 189S. 



Off Georgia, seven specimens. Off the Atlantic coast from lati- 

 tude 37° to latitude 47° in 90 to 1,608 fathoms; Verrill. 

 24105— 27t 2 



