. The Cephalopoda of the Hawaiian Islands. Cephalopoda; Mollusks. CEPHALOPODA OF THE HAWAIIAN ISLANDS. J95 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 hectocotvlus 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 expending anterio
. The Cephalopoda of the Hawaiian Islands. Cephalopoda; Mollusks. CEPHALOPODA OF THE HAWAIIAN ISLANDS. J95 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 hectocotvlus 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 expending 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 ocheror 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 areo
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Keywords: ., bookcentury1900, bookdecade1910, bookpublish, booksubjectmollusks
