Boone, Mollusca, Cruises of "Eagle" and "Ara," 1921-28 191 



lacking. The alcoholic specimens are purplish brown with a wart-like 

 skin. There is a large circular peacock eyespot of purplish black be- 

 low the eye on either side near the base of the web and approximately 

 between the second and third arms. The inner surface of the suckers 

 is creamy yellowish. 



Technical description: The body is elongate pyriform, enlarged 

 and rounded posteriorly. The head is large, narrower than the body, 

 from which it is defined by a slight constriction. The sides of the head 

 about the eyes are prominent. The upper surface of the head, body 

 and web is entirely covered with conspicuous, elevated warts of differ- 

 ent sizes. These are especially numerous around the eye. Above and 

 behind the eye there is one conspicuous warted surface. On the ventral 

 surface of the body these warts are normally smaller. The web is 

 well developed, uniting the proximal region of the arms for a consid- 

 erable distance. It is broadest between the second and third pairs of 

 arms, also more extensive between the dorsal pairs of arms than be- 

 tween the ventral pair. The ventral surface of the web and arms and 

 lateral surface of the arms are covered with very numerous conical 

 warts, closely crowded and frequently appearing in patches, separated 

 by reticulated wrinkles. The arms are unequal, the dorsal pair being 

 distinctly the shortest; the second, third and fourth pairs are very 

 nearly equal. Near the base the arms are rounded trapezoidal, the 

 ventral face broad, bearing two rows of alternating suckers, the dorsal 

 surface is rounded ; the membrane along the sides of the arm in con- 

 tinuation of the web is narrow, almost linear, and extends for only a 

 short distance. The suckers, arranged alternatingly in two rows, are 

 large, circular, with a deep central pit, saucer-shaped, with strong, 

 fine, radiating grooves; the margin is distinctly expanded with two 

 borders, the outer of which is soft and finely crenulated, the inner 

 one divided into lobes by radiating grooves. There are 30 to 32 

 suckers on the proximal part of the arms; these are large, but little 

 elevated, with broad bases. Beyond the web, the suckers diminish 

 rapidly in size. On the distal half of the free arms they become very 

 small but extend quite to the tip. For description and figures of the 

 hectocotylized third right arm of the male, consult Verrill. The largest 

 specimen recorded by Verrill has its greatest arm length 550 mm., or 

 a total maximum reach of 1100 mm. The specimen before me is 

 scarcely half that size. 



