CEPHALOPODA OP THE HAWAIIAN ISLANDS. 
303 
Specimens of Polypus Examined. 
Num- 
ber of 
speci- 
mens. 
Locality. 
Depth. 
Collector. 
Sex. 
Where deposited. 
Author’s 
register. 
I 
Honolulu, Oahu 
Shore 
Wood 189S 
? 
Stanford Univ. Coll., Cat. 
2091. 
180 
? I 
Honolulu Reef, Oahu 
. . - do 
0. P. Jenkins 
9 
Stanford Univ. Coll., Cat. 
2092. 
188 
I 
Off Kaluapapa, Molokai . . . 
Surface 
Albatross station 390!? 
9 
U. S. Nat. Mus., Cat. 214384, 
203 
I 
Off Lae-o Ka Laau , Molokai 
. . .do 
Albatross station 3849 
9 
Not preserved 
172 
Remarks . — These specimens are obviously not the young of either Polypus ornatus or P. hoylei. 
In some respects they approach P. marmoratus, but differ decidedly in coloration, in shape, the absence 
of ocular markings, and the double row of small chromatophores on the ventral arms of the very young. 
The funnel organ also appears to be a little different, being narrower and more deeply cleft in the 
median line. Were it not for the papillated surface and the cirri over the eyes, a relationship with 
P. hawaiiensis might be suggested, but even here these are not the only difficulties. The most con- 
spicuous features of possibly diagnostic importance in addition to those just noted are the short dorsal 
arms, the subequal dimensions of the remainder, the elongate body, and the relative shortness of the 
umbrella dorsally. Some of the specimens have a superficial resemblance to Scaeurgus patagiatus in 
a general way, but of course lack the marginal fold and other distinguishing features. As in the latter 
species, the body is remarkable for its compactness and solid consistency in alcohol. 
Polypus d (young). 
A single badly mutilated Polypus taken on the reef at Honolulu by Dr. O. P. Jenkins and now in 
the Stanford University collections does not seem clearly identifiable with any of the other forms which 
have been discussed. It is chiefly characterized by its small ovoid body, smooth save for a few small 
isolated papillae; broad head; protruding eyes, ornamented above by two or three minute cirri; the 
very scanty umbrella, which is much shorter than in any other Hawaiian Polypus, not even 
excepting P. ornatus; short dorsal arms, and the extremely stout and long arms of the third and fourth 
pairs. The arms of the second pair are both mutilated, but with this exception the order of relative 
length is 3=4.1. The suckers are fairly large, very numerous, and close set. The color is cloudy black 
above, pale beneath. 
In some respects this specimen recalls P. ornatus, but in most ways the aspect is notably different. 
It is No. 186 of the author’s register. 
Measurements op Polypus d. 
mm. 
Totallength 162 
Tip of body to base of dorsal arras 22 
Length of body 15 
Width of body 14 
Width of neck 10 
Width of head 12 
Length of — 
Right dorsal arm 17+ 
Left dorsal arm 71 
Right second arm 17+ 
Length of— mm. 
Left second arm 32+ 
Right third arm 37-)- 
Left third arm 137 
Right ventral arm 
Left ventral arm 
Umbrella between dorsal arms. . 
Umbrella between ventral arms 
Diameter of largest suckers 3 
Diameter of mantle opening 9. 5 
Length of furmel 9 
