430 PROCEEDINGS OF THE ACADEMY OF [July, 



the under sides of the fins, the hyaline area above described, the 

 inner surfaces of the arms, and the keels of the three dorsal pairs 

 the skin is nearly or entirely free of chromatophores. Because 

 appearing with unusual constancy, a single large chromatophore, 

 surrounded by a circlet of smaller ones and situated on the head 

 just posterior to the crotch between the dorsal arms, is also probably 

 worthy of mention. The lens of the eye is large, spherical, and 

 exquisitely pearly. 



Measurements. 

 Author's register 147 279 



Specimen number 12 3456 



mm. mm. mm. mm. mm. mm. 



Length, total 132 119 125 117 123 



Length, exclusive of tentacles 95 91 86 97 93 98 



Length of mantle, dorsal 59 55 52 60 57 55 



Width of mantle 16 15 13 15 14 17 



Width across fins 38 38 37 45 40 46 



Length of fins, total 39 36.5 34 38 35 38 



Length of fins along plane of 



attachment 33.5 33 30 33 30 32 



Width across head 17 18 17 15 13 15 



Width between eyes 8 7 7.5 9 7 8 



Length of head, dorsal 12 11 12 11 11 12 



Length of right dorsal arm 19 17 19 23 22 22 



Length of left dorsal arm 21 18 20 22 22 22 



Length of right second arm 22 23 22 25 26.5 25 



Length of left second arm 22 23 22 25 25 26 



Length of right third arm 23 23 22 25 24 25 



Length of left third arm 24 23 23 25 25 25 



Length of right ventral arm 26 28 26 28 28 31 



Length of left ventral arm 27 24 27.5 28 31.5 



Length of right tentacle 59 55 56 52 56 



Length of left tentacle 65 51 53 48 55 



Length of tentacle club 77 7 7 7.5 



Length of funnel 9 



Type. Cat. No. 2,053. Invertebrate Series, Stanford University 

 collections [S. S. B. No. 147]; a female. 



Type Locality. Japan, probably off Misaki (Alan Owston ?); 

 three 9 specimens. 



Material Examined. In addition to the three cotypes, three 

 other specimens, taken at Misaki by Ishikawa [S. S. B. No. 279], 

 have been examined. All six are females. In the tables they have 

 been numbered, respectively, 1-3 and 4-6, and the specimens denoted 

 as Nos. 3 and 5 have been destroyed by dissection. 



