182 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.57. 



Penis comparatively large, a little coiled, the entire contour being 

 triangular, the center of which is connected with the duct of Need- 

 ham's sac. Spermatophores 23 mm. long, 1 mm. thick; discharging 

 tube 15 mm. long, smooth, neither coiling nor striated. Coils of 

 sperm cord 19. 



Principal measurements of type: Total length 182 mm.; ventral 

 length of mantle 20 mm.; longest arm 145 mm.; left thu'd arm 76 

 mm.; right third arm 3 mm.; diameter of largest sucker 2.4 m_m. ; 

 longest radius of umbrella 14 mm. 



Type.—C&t. No. 332963a, U.S.N.M. 



23. POLYPUS TENUIPULVINUS, new species, 



Plate 24, fig. 5. 



Station 5092 (Sagami Sea). One female. Cat. No. 332977, 

 U.S.N.M. 



Consistency firm, fleshy. Skin wrinkled in all parts, dorsal sur- 

 face finely tessellated with innumerable grooves, and beset with 

 some numbers of tubercles regularly distributed almost as in P. 

 vulgaris. Body compact, as long as broad, devoid of a horizontal 

 ridge around the periphery. Head a little narrower than the body, 

 marked off by constrictions both in front and behind. Umbrella 

 poorly and equally developed all round. 



Funnel organ peculiarly characterized, consisting of two slender 

 hooked-shaped pads, which begin at the funnel extremity and extend 

 two-thirds down the distance to the anus. 



Ai-ms unequal, the formula of length 1>2>3>4 in the right 

 side and 2>3=l>4in the left; the longest about twice the shortest 

 and about one-seventh the body length; all roundish, devoid of 

 even a trace of contractile web on either side. Suckers small, rather 

 sparsely set in two rows but at the base of the arms thej'^ are in a 

 zigzag line. None of the suckers specially enlarged. 



Caecimi of stomach elongated bent into an L-shape. Gill com- 

 posed of 16 leaflets only. Vaginae thick, straight, terminating far 

 behind the anus. 



Total length 155 mm.; ventral length of mantle 19 mm. 



Ti/pe.— Cat. No. 332977, U.S.N.M. 



24. POLYPUS SALEBROSUS, new species. 



Station 5050 (off Kinka-san). One female. Cat. No. 332969, 

 U.S.N.M. 



Station 5029 (Okhotsk Sea). One juv. female. Cat. No. 332970, 

 U.S.N.M. 



Skin rather loose, soft. Suiiace quite rough in all parts, thickly 

 beset with peculiar, coarse well-defined warts, which on the lateral 

 and ventral surface of body run together into longitudinal lines. 



