298 
BULLETIN OE THE BUREAU OE EISHERIES. 
Measurements of Polypus hoylei. 
Author’s register 
166 
176 
178 
Sex 
c? 
cf 
? 
C 
(type.) 
Total length 
mm. 
mm. 
ww. 
108 
mm, 
148 
54 
26 
Tip of body to base of umbrella 
6s 
41 
Width of body 
^8 
26 
36 
Width of head 
2 
IrCngth of— 
Right dorsal arm 
109+ 
iii-h 
o 161 + 
89 
88 
71 
76 
76 
49+ 
Right second arm 
89 
82 
75 
78 
85 
85 
62-1- 
86-h 
93 
116 
158 
104+ 
22-{- 
66 
heft third arm 
74 
75 
Left ventral arm .' 
79 
Hectocotylus 
" 6-5 
Umbrella between dorsal arms 
30 
36 
20 
li 
15 
17 
18 
17 
18 
15 
16 
22 
16 
o Through an inadvertence the length of this mutilated arm was given in the original description as that of the second arm 
pair. In the above table the measurements of all the arms were taken along the inner surface from the mouth to the tip. The 
umbrella was measured externally. 
Type. — Cat. no. 214310 United States National Museum [S. S. B. 166]. 
Type locality. — Hawaiian Islands (Albatross); the exact locality and other data are unknown as 
this specimen was unfortimately not accompanied by any label when it came into my hands. 
Distribution. — Among the Hawaiian Islands, in the archibenthal region (Albatross). 
Specimens of Polypus hoylei Examined. 
No. of 
speci- 
mens. 
Locality. 
Depth 
in 
fathoms. 
Collector. 
Sex. 
A\Tiere deposited. 
Author’s 
register. 
Oi 
7 
c? 
U. S. N.M. Cat. 
Kaiwi Channel, between Molokai and 
Oahu. 
449-460 
283-309 
237-312 
? 
2I43IO. 
178 
' 176 
177 
d' 
9 
® Type. 
Remarks. — P. hoylei appears to be a characteristic member of the deeper water fauna of this region. 
Finding no close ally among its neighboring congeners, it is conspicuously characterized by its pale 
color, soft consistency, unusually small mantle opening, fine surface papillation, short arms, stout hec- 
tocotylized arm, and the very imusual shape of the fvmnel organ. I had originally thought that this 
species might be a near relative of P. januarii (Steenstrup), but a reconsideration of the admirably full 
description of the latter in the Challenger Report has led me to believe that the alliance is not especially 
close. Both are of deep-water habit and such resemblance as exists between them may well be due to 
coordination with a similar environment. P. hoylei bears a certain resemblance to some of the pub- 
lished figures of P. sponsalis (P. and H. Fischer) and one or two similar forms, but it is, I think, suffi- 
ciently distinct. 
Altogether it is an unusually attractive and interesting species. The specific name is in honor of 
that master student of cephalopods. Dr. William Evans Hoyle. 
