CEPHALOPODA OF THE HAWAIIAN ISLANDS. 34 1 



the second and third pairs), and the fact that the teeth of the latter are not subequal but the middle 

 tooth on the upper side is conspicuously larger than its neighbors, showing in this last character an 

 approach to the condition prevailing in the Atlantic O. sagittatus. From this resume it would appear 

 that O. hawaiiensis is in some respects intermediate between O. sagittatus and O. pacificus, while in a few 

 particulars it is somewhat different from either. 



The position of O. sloanei I am now disposed to regard as more doubtful than ever, for undoubtedly 

 the union of O. pacificus with it was more premature than the meager evidence would justify. The 

 habitats of all three of the Pacific forms are still widely separated, and further material, particularly from 

 southern localities, is an important desideratum. 



Genus SYMPLECTOTEUTHIS Pfeffer 1900. 



Symplectoteuthis Pfeffer 1900, p. 178, 180. 

 Symplecioleuthis Pfeffer 1912, p. 388. 501. 



Funnel groove with a foveola. Funicular locking cartilages fused with those of mantle on at least 

 one side. Horny rings of large tentacular suckers with one tooth in each quadrant much enlarged. 

 Sucker-bearing portion of tentacle comprising less than half the total length . Fixing apparatus com- 

 posed of a few heavy pads and smooth-ringed suckers. 



Type. — Loligo oualaniensis Lesson 1830 (monotypic); a species of the tropical Pacific. 



Symplectoteuthis oualaniensis (Lesson 1830) Pfeffer 1900. 



Loligo oualaniensis Lesson 1830, p. 240, pi. 1, fig. 2. 



Ommastrepkes oualaniensis d'Orbigny 1845, p. 427. 



Ommastrephes oualaniensis Tryon 1879, p. 180, pi. 81. fig. 368 (after d'Orbigny). 



Ommastrepkes oualaniensis Schauinsland 1899, p. 92 (listed from Laysan). 



Symplectoteuthis oualaniensis Pfeffer 1900, p. 180. 



Symplecioleuthis oualaniensis Hoyle 1904, p. 32, fig. F. 



Symplectoteuthis oualaniensis Berry 1909, p. 419 (merely listed). 



Symplectoteuthis oualaniensis Pfeffer 1912, p. 502, pi. 40, 41; pi. 42, fig. 1-4. 



I have seen no specimens of this species, but include it here on the authority of Schauinsland, who 

 found it one of three species of squid which compose a chief food for the Laysan albatross. It is an 

 abundant species of wide distribution, having been reported from the Red Sea, Laccadive Islands, 

 Japan, Australia, the Cocos Islands, and Laysan. It may be readily recognized by the compressed 

 arms, short tentacle club, and the fusion of the ventral mantle locking cartilages with those of the funnel. 



Genus RHYNCOTEUTHION Pfeffer 1908. 



Rhyncoteutkis Chun 1903, p. 716 (not of d'Orbigny 1847). 

 Rhyncoteuthis Hoyle 1904. p. 32. 

 Rhyncoleuthion Pfeffer 1908, p. 88. 

 Rhyncoteuthis Chun 1910, p. 201. 



This is a name which has been applied to various larval Ommasirephidcz during the curious stage 

 when the tentacles are fused along a portion of their inner faces, to form in some cases an elongate pro- 

 boscis-like organ, or in others a pincer-shaped organ. The development and relationships of the different 

 forms which have been described is still so insufficiently known that it is impossible to refer them to 

 the proper adult form, so that it is convenient to give them provisional consideration by themselves. 



Type. — No type has ever been given and but one species (R. chuni Hoyle 1904) has received a 

 specific name. 



Rhyncoteuthion a. (PI. liii, fig. 1.) 



Cf. Rhyncoteuthis chuni Hoyle 1904, p. 32, fig. G. 



Ommastrephid (young) Berry 1909 (pars), p. 419 (mere locality records). 



Animal small, pelagic. Body rather short, robust, cylindrical, tapering to a blunt point posteriorly; 

 width of mantle in largest specimens less than half its length, in smaller examples considerably more 

 than half its length. Fins extremely short and broad in the larger specimens (mantle length of 20 mm.), 

 more rounded and very minute in the smaller, with all variations between; subterminal to terminal. 

 Locking cartilages typically Ommastrephid. 



