dall: mollusca and brachiopoda. 361 



Cadulus (Gadila) platystoma Pilsbrt and Sharp. 



Cadulus platystoma Pilsbry and Sharp, Man. Conch., 1898, 17, p. 180, pi. 35, figs. 

 17, 18. 



U. S. S. "Albatross," station 2792, off Manta, Ecuador, iu 401 fathoms, mud, 

 bottom temperature 42°. 9 F. U. S. N. Mas. 107,699. 



Somewhat like C poculum, of the Atlantic, in being markedly bent, with the 

 tube compressed anteriorly, but in the Pacific species the inflation is greater and 

 not augulate, and the posterior part of the shell less attenuated. C. peruvianus 

 is stouter, with a proportionately larger oral aperture. 



Cadulus (Gadila) peruvianus Dall, n. sp. 



Shell milk-white, smooth, polished, arcuate, inflated; aperture oblique, the 

 form oval, with the dorsoventral diameter shorter ; equator nearly at the anterior 

 third, the anterior part contracting markedly from the equator forward but 

 without angularity ; posterior portion not greatly attenuated, rather unusually 

 large for the genus, the anal aperture apparently circular and simple. Length, 

 12.3'; anal end to equator, 8.3 ; perpendicular between shell and chord, 1.0; max. 

 diam., 3.0; of oral aperture, 2.0; vertical of do., 1.6 ; anal aperture, 1.0 mm. 



U. S. S. "Albatross," station 4654, off Point Aguja, Peru, in 1036 fathoms, 

 mud, bottom temperature 38°.5 F. U. S. N. Mus. 110,671. Also at station 

 2807, near the Galapagos Islands, in 812 fathoms, ooze, temperature 38°. 4. 



The oral aperture is notably oblique, being inclined at an angle of some 40°. 



The shortness and stout form of this species sufficiently differentiate it from 

 others of the refriou. 



PELECYPODA. 



PRIONODESMACEA. 



(A. Marrjo edentato.) 



Solenomyacea. 



Solenomyacidae. 

 SOLE.nVA Lamarck. 



Solemya Lamarck, An. 9. Vert., 1S18, 5, p. 488. let sp., .?. australis Lam., I.e. 

 selected as type by Bowdich, 1822, and Blainville, 1825. 



This genus was first brought to notice in 1793, by Ulysses von Salis Mnrsch- 

 lins in the second edition of his Ncapcl Reise, where he named a specimen from 



