. The Cephalopoda of the Hawaiian Islands. Cephalopoda; Mollusks. CEPHALOPODA OF THE HAWAIIAN ISLANDS. 279. Fig. 5.—Argonauta bottgeri, out- line drawing of funnel laid open medioveutrally to show the funnel organ [165], X 2. modified extremities of the dorsal pair, on which latter only the basal 15 to 16 are at all well developed. The funnel is connected to the head dorso-Iaterally by a pair of delicate bridle-like connective mem- branes, which are continuous with a delicate keel running along the lower aspect of each ventral arm; otherwise the arms are rounded and devoid of keels or swimming
. The Cephalopoda of the Hawaiian Islands. Cephalopoda; Mollusks. CEPHALOPODA OF THE HAWAIIAN ISLANDS. 279. Fig. 5.—Argonauta bottgeri, out- line drawing of funnel laid open medioveutrally to show the funnel organ [165], X 2. modified extremities of the dorsal pair, on which latter only the basal 15 to 16 are at all well developed. The funnel is connected to the head dorso-Iaterally by a pair of delicate bridle-like connective mem- branes, which are continuous with a delicate keel running along the lower aspect of each ventral arm; otherwise the arms are rounded and devoid of keels or swimming membranes. Dorso-laterally the integument of the head is connected with the dorsal arms by a delicate vertical membrane bridging the sulcus which otherwise separates the arms and head, and two similar but smaller membranes bridge the constriction between the anterior boundary of the eyeball and the lateral arms. Shell small for the genus, coiled very compactly in an even plane, laterally compressed; the sides ornamented with some 30 or more conspicu- ous ridges radiating from the shallow depression which is the outward mark of the shell axis; periphery flattened, each angle decorated with a row of bluntly squared tubercles, 17 to iS of which can be made out on each side; margin of aperture simple, without any trace of lateral expan- sions or " auricles;" surface finely and quite evenly granulose, the granules most numerous on either side of the shell near the axis and visible without the aid of a lens (fig. 4). General surface color of animal in alcohol everywhere a pale brown- ish buff, dotted more or less impartially with numerous fairly large bluish black chromatophores, which are nowhere crowded save on the outer aspect of the dorsal arms and in less degree the dorsal integument of the eyeball. Beak coal black. As no male animal of this species has come to hand the above description applies only to the female. However, the mantle of the specimen before me was c
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Keywords: ., bookcentury1900, bookdecade1910, bookpublish, booksubjectmollusks
