708 BEEP WATER MOLLUSKS AND BRACHIOPODS— BALL. voL.xvn. 



aud white, tlie pillar twisted, with a solid white inner edge and strong 



siphonal fasciole; canal moderate, slightly recurved; outer lip slightly 



crenulated by the sculpture, sharp, very slightly expanded; throat 



smooth, pinkish; epidermis very thin and translucent, closely adherent 



to the surface; operculum normal, light brown. Length of shell 



(decollate), 100; of last whorl, 80; maximum diameter, 56 mm. 



This fine shell belongs to the typical group like C. fornicatus and 



Cliratus, but by its compact, even, and uniformly constant sculpture 



and details of form, seems sufficiently distinct. 'No male specimens 



were obtained, but the characters observed in the soft parts were 



normal. 



CHRYSODOMUS PERISCELIDUS, Dall. 



Plate xxvii, fig. 6. 



Chi-ysodomus periscelidus, Dall, Proc. U. S. Nat. Mus., xiv, 1891, p. 187. 



Station 2842, off the coast of Akutan Island, Aleutians, in the Pacific, 



in 72 fathoms pebbly bottom; temperature 41° F. Ko. 122643, U.S. 



]S.M. 



CHRYSODOMUS PHCENICEUS. Dall. 



Plate XXIX, tig. 1. 

 Chrysodomus phceniceus, Dall, oj). cit., p. 187, 1891. 

 Station 2802, off' the British Columbian coast, in latitude 50° 49' 

 north, in 238 fathoms, sand ; bottom temperature, 44.7° F. No. 122657, 



U.S.N.M. 



CHRYSODOMUS ITHIUS, Dall. 



Plate XXIX, fig. 4. 



Chrysodomus ithius, Dall, op. cit., p. 188, 1891. 

 Station 3202, off Santa Cruz, Cal., in 382 fathoms, mud; tempera- 

 ture 41.10 F. No. 122049, U.S.N.M. 



CHRYSODOMUS (SIPHO) HYPOLISPUS, Dall. 

 Plate XXVII, fig. 1. 

 Chrysodomus {Si])ho) hypolispus, Dall, op. cit., p. 188,1891. 

 Station 3254, in Bering Sea, north of Unimak Island, Aleutians, in 

 46 fathoms, mud ; bottom temperature 36.2° F. No. 122606, U.S.N.M. 



CHRYSODOMUS (SIPHO) ACOSMIUS, Dall. 



Plate XXVII, fig. 3. 



Chrysodomus (Sipho) aeosmius, Dall, oj). cit., p. 188, 1891. 

 Station 3329, in Bering Sea north of Unalaska, Aleutians, in 399 

 fathoms, sand; bottom temperature 37.7° F. No. 122635, U.S.N.M. 



CHRYSODOMUS (SIPHO) HALIBRECTUS, Dall. 

 Plate XXIX, fig. 9. 

 Chrysodomus (Sipho) halibrectus, Dall., op. cit., p. 188, 1891. 

 Station 3330, in Bering Sea, north of the island of Akutan, in 351 

 fathoms, muddy bottom; temperature 37.8° F. No. 122603, U.S.N.M. 



