10 PROCEEDINGS OF THE NATIONAL MUSEUM vol. GG 



CHRYSODOMUS NUCEUS Dall 



Plate 4, fig. 3 



Cliri/sodomus nuceus Daltl, Proc. U. S. Nat. Mus., vol. 56, No. 2295, p. 822. l'.)l;). 

 Cook's Inlet, Alaska. U. S. Nat. Mus. Cat. No. 151429. 



CHRYSODOMUS PRIBILOFFENSIS Dall 



Plate 7, fig. 4 



Chnjsodamus prWiloffcnsis Dall, Proc. U. S. Nat. Mus., vol. 56, No. 2205, 

 p. 323, 1919. 

 Bering Sea, off the Pribilof Islands in 50 to 100 fathoms. U. S. Nat. Mus 

 Cat. No. 2240S5. 



CHRYSODOMUS SATURUS TABULARIS Dail 



Plate 4. fig. 6 



Uhrijsodomus satiiriis Mabtyn, var. talndaris Dall, Proc. U. S. Nat. Mus., vol. 

 56, No. 2295, p. 323, 1919. 

 Bering Sea, near Nunivak Island. U. S. Nat. Mus. Cat. No. 31359. 



CHRYSODOMUS SMIRNIUS Dall 



Plate 4, fig. 2 



Chrysodomus smirnius Dall, Proc. U. S. Nat. Mus., vol. 56, No. 2295, p. 322, 

 1919. 

 Straits of Fuca, in 114 fathoms. U. S. Nat. Mus. Cat. No. 130418. 



CHRYSODOMUS VINOSUS Dall 



Plate 6, fig. 3 



Chrysodomus vinostis Dall, Proc. U. S. Nat. Mus., vol. 56, No. 2295, p. 323, 1919. 

 Avacha Bay, Kamchatka, in 16 fathoms. U. S. Nat. Mus. Cat. No. 225608. 



CIRSOTREMA PLEXIS, new species 



Plate 21, figs. 12, 12a 



Shell slender, whitish, with 10 moderately rounded whorls exclu- 

 sive of the (lost) nucleus; with five or six irreguLarly placed major 

 varices, and numerous minor ones which bridge by slender projections 

 the invisible suture ; on the last whorl there are 20 minor and 3 

 major varices; the spiral sculpture, imbedded in the minor varical 

 sculpture is obscurely indicated as a cord in front of the suture, 4 

 obscure ones, which form projections on the major varices, between 

 the former and the base which is indicated by a deep furrow in front 

 of which is a very strong cord around a marked concavity ; both the 

 furrow and the concavity are bridged by slender extensions of the 

 minor varices; the minor varices are externally flattened and ob- 

 liquely sculptured as indicated in figure 12*2.; the axis is imperforate, 

 the aperture circular, the final varix heavy and crenulated; height 



