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. 



Length, total 



Length, exclusive of tentacles 



Length of mantle, dorsal 



Width of mantle 



Width across fins 



Length of fins, total 



Length of fins along plane of 



attachment 



Width across head 



Width between eyes 



Length of head, dorsal 



Length of right dorsal arm 



Length of left dorsal arm 



Length of right second arm 



Length of left second arm 



Length of right third arm 



Length of left third arm 



Length of right ventral arm 



Length of left ventral arm 



Length of right tentacle 



Length of left tentacle 



Length of tentacle club 



Length of funnel... 



1 

 mm. 



132 

 95 

 59 

 16 

 38 

 39 



33. 

 17 



8 

 12 

 19 

 21 

 22 

 22 

 23 

 24 

 26 

 27 

 59 

 65 



7 



o 



9 



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

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



Tijpe 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], 



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



imbered, respectively, 1-3 and 4-6, and the specimens denoted 



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



