CEPHALOPODS OF WESTERN NORTH AMERICA. 



287 



the body more delicate, and the color lighter. Furthermore the chromatophores are relatively somewhat, 

 fewer, but they are very small and do not show the definite arrangement so characteristic of the young of 

 P. hongkongensis, P. bimaculatus, and other species. Two individuals exhibiting these features are 

 shown in plate XL, figures 2 and 3. 



The detailed measurements of eight specimens from the Albatross collections are given in the ac- 

 companying table. 



Measurements op Polypus californicus. 



Sex and locality 



Author's register 



Total length 



Tip of body to base of dorsal arms, . 

 Width o( body 



Neck 



Head 



Length of funnel 



Dorsal arm 



Second arm 



Third arm 



Ventral arm 



Hectocotylus 



Umbrella between dorsal arms. 



Umbrella between ventral arms 



ISta. 4325. 



mm. 



308 



89 



67 



46 



so 



36 



«IS6 



J38 



159 



a 10 



38 



so 

 SJ 



<f 

 Sta. 4335. 



mm. 

 390 

 90 

 62 

 47 

 5' 

 34 

 301 

 3o6 

 149 

 193 



Sta. 4323. 



Sta 4339. 



36s 

 83 

 s8 

 43 



47 

 33 

 175 

 20s 

 140 

 273 



3S 



43 

 4> 



Tnm. 



350 

 108 



68 

 44 



4S 

 36 



o 166 

 26 s 

 308 

 250 

 36 

 62 

 45 



9 



sta. 4369. 



mm. 



277 



75 



73 



54 



SI 



29 



203 



200 



203 



196 



5 



sta. 4323. 



mtn. 



250 

 74 

 63 

 48 

 54 

 29 



190 



18s 

 Ol7I 



170 



9 

 Sta. 4323. 



Tnm. 



260 

 72 

 63 

 46 

 53 

 26 



185 



196 

 o 180 



170 



Jnv. 

 Sta. 4366. 



68 

 28 

 19 

 16 

 16 

 10 



49 

 SI 

 50 

 SO 



IS 



■4 



<• Mutilated. 



Type, catalogue no. 214321, U. S. National Museum; a male (from no. 131 of the author's register). 



Type locality, Albatross station 4325, vicinity of San Diego, California, igi-292 fathoms, bottom 

 of green mud and fine sand; three specimens, March 8, 1904. 



Distribution: Offshore in rather deep water, Monterey Bay, off Santa Catalina Island, and in 

 vicinity of San Diego, California. 



Sixteen specimens from ten stations have been examined, as follows: 



Speomens op Polypus caufornicus. 



No. 



Locality. 



Vicinity of San Diego, Cal . 



do 



do 



.do. 



do. 

 do. 

 do. 

 do. 

 do. 



Off Santa Catalina Island. 



Cal. 

 Monterey Bay, Cal 



Depth in 

 fathoms. 



9S-I3S 

 193-237 

 191-292 



. do 



341-369 

 167-191 

 130-158 

 176-181 

 360-284 

 152-162 



1,006-1.041 



Albatross station 4312 . 

 4333 

 433S. 



4335. 



4339 . 



4358. 



436s. 



4366. 



4369 



4413- 



4536. 



Sex. 



Juv. 



Juv. 

 Juv. 

 Juv. 



JuV- 



Juv. 



where deposited. 



U. S. Nat. Mus., 



314321 (type). 

 Cotypes 



Author's 

 register. 



127 

 ■35 

 ■31 



13" 



133 

 138 



X36 

 Z39 



133 

 130 



136 



This species is well separated from any other form known to me by the color and consistency of its 

 body, prominent hectocotylization, wide mantle opening, adherent funnel, characteristic funnel organ, 

 and very distinctive surface ornamentation; features which enable even very young specimens to be 

 recognized without difficulty. Indeed the very young of practically all our Polypi are apt to be more 

 readily separable upon casual examination than the adults of the corresponding species. The surface 

 papulation which is the subject of so great change and variation in other species is here surprisingly 

 constant and strongly inclines one to the belief that at least witliin certain limits this should be regarded 



