CEPHALOPODA OF THE HAWAIIAN ISLANDS. 
295 
ened and expanded spoon-shaped organ, its inner surface broadly but not abruptly excavated and 
ornamented with numerous irregular transverse wrinkles or grooves. (PI. xlvi, fig. 2, represents the 
hectocotylus of an immature specimen.) 
The surface ornamentation is very distinctive. Body nearly smooth below; above coarsely and 
irregularly papillose, the papillae ordinarily arranging themselves in fairly distinct longitudinal lines, 
most noticeable on the nuchal region, but extending anteriorly over the umbrella and posteriorly over 
the dorsum before becoming obsolete. Certain of these papillae are larger than the 
others, and in preserved specimens they often become confluent with one another in 
certain regions of the body to form narrow elongate ridge-like folds of great perma- 
nency; along the median line are three of these folds, one extending back from the 
nuchal region for about a third the length of the body, the second some distance pos- 
terior to it in the same line, but much shorter, and a third still farther back and 
representing but little more than a single large papilla. Lateral to these are three 
series of similar ridges; two short ones, which, in conjunction with the two chief 
median ridges, inclose a dark quadrangular area in the middle of the dorsum; two 
longer folds external to these and paralleling the anterior median fold; and outside 
these, two still longer but more or less interrupted ridges extending from the upper 
edges of the mantle opening well past the middle of the body. There are three 
rather small bluntish cirri just above each eye opening. 
Color of specimens preserved in alcohol a dull buff, much clouded above with a 
more or less washed out reddish chocolate, and below with dull ocher or a livid brown. 
Each of the integumentary ridges which have been described is inclosed in a promi- 
nent band of buff, and a conspicuous series of areolae or reticulations of the same pale 
tint are disposed in pairs along the outer surfaces of the four dorsal arms for the greater 
portion of their length. Gould states the general ground color of the living animal to be orange, but 
in alcoholic material this fades, and in some specimens the buff bands and areolae may appear not 
lighter (as in the specimen to which particular reference is had above), but actually darker and 
brighter than the surrounding integument. The chromatophores are excessively small and copiously 
distributed. 
Measurements or Polypus ornatus. 
Fig. 14. — Poly- 
pus ornatus 
[179], outline 
drawing of fun- 
nel laid open 
medioventrally 
to expose the 
funnel organ, 
natural size. 
382 
cT 
<s 
mm. 
650+ 
97 
68 
mm. 
526 
61 
mm. 
263 
38 
Length of body (dorsal) 
57 
28 
305+ 
465 
360 
Length of— 
553 + 
I 7 S 
480 
234 
380 
36s 
380 
56 
34 
175 
310 
155 
270 
27 
IS 
132 
13 
40 
38 
28 
17 
IS 
Width of mantle opening 
33 
