CEPHALOPODA OF THE HAWAIIAN ISLANDS. 
301 
Measurements op Polypus 
190 
196 
193 
197 
190 
196 
193 
197 
mm. 
mm. 
mm. 
mm. 
Length o( — 
mm. 
mm. 
mm. 
mm. 
Tip of body to base of dorsal arms . . 
19 
15 
10 
6 
Right third arm 
29 
19 
14 
4 
15 
8 
Left ventral arm 
14 
Length of — 
Umbrella between ventral arms. 
10 
8 
7 
28 
28 
29 
19 
14 
Material examined . — Specimens exhibiting essential accord with the above description were very 
commonly taken by the Albatross in surface hauls. In all some 15 individuals are to be recorded. 
Specimens op Polypus Examined. 
No. of 
speci- 
mens. 
Locality. 
Depth. 
Collector. 
Author's 
register. 
197 
Remarks . — The series of small Polypi now under discussion has been the occasion for no little per- 
plexity, especially since it seemed natural to suppose that a species of such apparent abundance ought 
to be represented in a collection of this size by adults as well, even though I have been utterly unable to 
bring about such an identification. The more salient characters which separate these specimens, even at a 
glance, from the other juveniles before me, are the comparative shortness and equality of the arms, the 
great development of the umbrella, faint papillation, and the prominent chevronlike chromatophores 
on the arms. It might be safe to propose a new specific name for this form, but in view of the lack of 
adult material and the unfortunate uncertainty which attaches to P. hawaiiensis , it seems the part of 
wisdom to refrain from adding another name to this already overburdened genus. 
Polypus y (young). 
Polypus r Berry 1909, p. 418 (merely listed). 
Several specimens have a different aspect from an3dhing thus far dealt with. The largest of these 
is the best preserved and may be briefly described as follows: 
Body bag-shaped, rather elongate, widest near the middle, without any very prominent ventral 
groove; length exceeding the width by about one-half. Surface densely papillose above, but nearly 
smooth below; the papillae extend thickly over the dorsal aspect of the mantle, head, and umbrella as 
well as the outer surface of the first two pairs of arms and the dorsal half of the outer surface of the third ; 
they are nearly equal in size, but on the body become longitudinally elongate and appear to be ranked 
in more or less irregular longitudinal rows, some of them occasionally tending to coalesce to form short 
60289° — Bull. 32 — 14 20 
