372 bulletin: museum of comparative zoology. 



West coast of Colombia, iu Panama Bay at station 2799, in 29^ fathoms ; 

 U. S. N. Mus. 110,686. Also at station 2805, Panama Bay in 51 fathoms; 

 station 2792, off Manta, Ecuador, in 401 fathoms, mud, bottom temperature 

 42°. 9 F. ; stations 2784, southern coast of Chile, in 194 fathoms, mud, tem- 

 perature 51°. 9, and 2783, in 122 fathoms, temperature 4S°; and on the west 

 coast of Patagonia, South latitude 51°12', in 258 fathoms, mud, temperature 48°. 

 An abundant, small and simple species unlike any other of the region, with a 

 range of some 3600 miles m latitude. 



Ledidae. 



LEDINAE. 



L.EDA Schumacher. 



In reviewing the synonymy of this genus I find a correction necessary to the 

 statement wliich appears in Trans. Wagner Institute, 3, p. 579. It is stated 

 there that the type of the genus is Leda rostrata Montagu. The early writers 

 confused various species of Leda together and the rostrata of Montagu was not 

 the species figured by Chemnitz (VII, figs. 550, 551) and Schumacher, and 

 which was named Mya pernula by Miiller in 1779. Of this species rostrata is a 

 synonym. The species described and figured by Montagu as Area rostrata and 

 accepted as Leda rostrata by Hanley (Mou. Nuculacea) is a Lembulus. The 

 type of Leda should therefore be cited as Leda pernula Miiller ( + X. rostrata 

 Gmelin and Schumacher but not of Montagu and Hanley). 



Leda (Jupiteria) gibbosa Sowekbt. 



Nucvla gtbbosa Sowerby, P. Z. S. Lend. 18.32, p. 198 ; Conch. Icon., 1871, 18, Men. 



Laeda, pi. 8, fig. 51. 

 Leda gibbosa Orbigny, V07. Am. Mer., 1846, Moll., p. 545. 



U. S. S. "Albatross," stations 2799, 2803, and 2804, in Panama Bay, in 26 to 

 47 fathoms, mud. U. S. N. Mus. 96,307- Payta, Peru, Orbigny. 



This fine, large, but rather coarse, species attains a length of 35 and a maximum 

 diameter of 14 mm. It has a well-marked pallial sinus rounded behind. Even 

 when living the greater part of the periostracum is usually wanting. 



Leda (Jupiteria) callimene Dall, n. sp. 



Flute 17, flgurefl 3, 4. 



Shell small, solid, plump, white, with a thin, pale brownish periostracum, 

 equivalvc, inequilateral; beaks small, pointed adjacent, vertically incurved; 

 lunulc and escutcheon not prrscnt, though by tiic presence of a strong radial 



