16 PEOCEEDINGS OF THE NATIONAL MUSEUM vol. G6 



CUSPIDARIA TROSAETES, new species 



Plate 29, fig. 5 



Shell large, thin, greyish, with a velvety periostracum, equivalve, 

 inequilateral, inflated; beaks low, rather anterior; posterior end 

 compressed, pointed, attenuated; anterior end evenly rounded; 

 posterior dorsal slope descending, nearly straight, base roundly 

 arcuated; hinge with an internal resilium inclined posteriorly, and 

 a single long lateral tooth in the right valve; length of shell, 25; 

 beaks before posterior end, 15; height, 16; diameter, 11 mm. U. S. 

 Nat. Mus. Cat. No. 110770. 



Dredged at station 4992, in the Japan Sea, in 325 fathoms, mud, 

 by the United States Bureau of Fisheries steamer Albatross. 



This belongs to the typical section of the genus, and is notable for 

 its thick velvety periostracum. 



CYMATIUM ADAIRENSE Dall 



Plate 35, fig. 1 



Ci/matiinn odairensc Dall, Nautilus, vol. 24, p. 33, 1010. 



Oft Adair Bay, Gulf of Califoruia. U. S. Nat. :\Ius. Cat. No. 21410.1. 



DENTALIUM CROCINUM Da'l 



Plate 27, fig. 8 



Dcntalitim crocinum Dall. Smithsonian Misc., Coll., vol. 50, p. 169. 1907. 

 Gulf of Tokio, Japan, in 8S fathoms. U. S. Nat. Mus. Cat. No. 110508. 



EMARGINULA CHORISTES, new species 



Plate 26, figs. 1. 4 



Shell thin, very elevated, tapering to an acute apex, which stands 

 vertically above the posterior margin; slit about one fifth of the 

 length of the anterior convex slope, its fasciole narrow and incon- 

 spicuous; posterior slope beneath the curved apex, nearly vertical; 

 color of the shell pale brownish; axial sculpture of about 16 major 

 threads with from 3 to 7 (often alternated) smaller threads between 

 them, closely reticulated by rather uniform small concentric threads : 

 the sculpture is rounded rather than sharp or laminate ; base ovate ; 

 height, 18; anteroposterior diameter, 17; transverse diameter, 12 mm. 

 U. S. Nat. Mus. Cat. No. 110781. 



Dredged in the Eastern Sea of Japan, in 361 fathoms, sand, at 

 station 4917, by the United States Bureau of Fisheries steamer 

 Albatross . 



ERYCINA COLPOICA Dall 



Plate 27. fig. 2 



Enjcina colpoica Dall, Proc. TJ. S. Nat. Mus., vol. 45, p. 596, 1913. 

 Gulf of California. U. S. Nat. Mus. Cat. No. 267403. 



