40 bulletin: museum of comparative zoology. 



beneath the integument, are four or five eye-like bodies, which are presumably 

 phosphorescent organs: the largest of these is situated just in frout of and be- 

 low the ocuUvr opening; it forms the antero-lateral prominence in the outline 

 of the head and is readily seen through the semi-transparent skin: it is oval 

 in form, the length being nearly equal to the diameter of the lens ; the others 

 are difficult to see until the skin has been removed. Surrounding the mouth 

 is an extensive buccal membrane, of a purplish color, which is attached to the 

 inner surface of all the arms, except the ventral pair, to a height of about 

 3 mm. from their bases. 



The Anm are sub-equal and about two-fifths the length of the body. The 

 first arm (Plate 7, Fig. 1) is provided on the inner aspect proxiraally with 

 about eight pairs of moderately large suckers, then four pairs of gradually 

 diminishing hooks, and beyond these a double series of small suckers, grad- 

 ually diminishing and reaching to the tip of the arm. The form of the 

 hooks is shown in Figs. 8 and 9. On the dorsal margin the middle third of 

 the arm is occupied by a narrow membrane : on the ventral margin is a web 

 neiirly half the breadth of the arm, which is cut by a series of notches into 

 lappets large in the middle third of the arm and gradually diminishing towards 

 the apex. On the external aspect of the arm is a narrow web for abwut its 

 third quarter. 



The second arm (Fig. 2) is of almost the same length as the first : it is 

 armed with about five pairs of suckers and then three pairs of hooks, beyond 

 which is a single small sucker ; there is no web on the dorsal margin, but on 

 the ventral is a broad web which has a wavy margin in the proximal half, 

 becoming somewhat more deeply notched towards the apex : on the external 

 aspect is a narrow web for about the distal third. 



The third arm (Fig. 3) is of the same length as the second : it is provided 

 with three pairs of suckers and then six or seven hooks about the middle of its 

 length, the distal portion being unarmed : on the dorsal margin is a very nar- 

 row web for the proximal two-thirds and on the ventral a broad web, wavy at 

 first and then scalloped : there is a broad web for mure than the distal half on 

 the outer aspect. 



The fourth arm (Fig. 4) tapers more abruptly, especially in the proximal 

 portion, than the others; the doi-sal aspect is hollowed, where it lies against 

 the tentacle, and the dorso-external angle is produced into a thin web which 

 joins the root of the third arm : it passes outside the tentacle and expands 

 distally into a web, comparatively broad in the middle third of the aim and 

 becoming evane.scent towards the tip. It posses.ses neither hooks nor suckers. 



The tentacle is about a.s long Jis the body. It is at first slender; then follows 

 a swollen portion, after wliicii it is slender again, ami afterwards becomes rhom- 

 boidal in secticm, that angle of the rhomb which is ilirected outwartls being 

 rounded off, whilst the other three are pronounced. From this point it tapers 

 graflually to the tip, there being no expanded club. The sucker-bearing face 

 occnpie.s only u few millimetres of the extreme tip of the infero-internal face. 

 There are two moderate-sized suckers proximally with smooth rings succeeded 



