REPORT ON THE CEPHALOPODA. 191 



Taonius hyperhoreus, Steenstrup (PI. XXXII. fig. 12; PL XXXIII. figs. 1-11). 



1856. Leachia hyperhorea, Stp., HectococtyL, p. 200. 



1861. Taonius hyperboreus, Stp., OverUik., p. 83 {non Verrill). 



1870. Leachia ellipsoptera, Carpenter, Jeffreys and Thomson, Proc. Roy. Soo. Lend., vol. xviii. 



p. 423. 



1879. Loligopsis Mjperhorea, Tryon, Man. Conch., vol i. p. 162. 



1882. Des7noteuthis tenera {?), VU., Ceph. JST. E. Amer., p. 412, pi. Iv. fig. 2; pi. Ivi. fig. 3. 



1884. Taonius liyperboreus, VIL, Second Catal., p. 245. 



1884. Loligopsis hyperborea, Rocliebr., Monogr. Loligopsidse, p. 12. 



1885. Taonius hyperboreus, Hoyle, Loligopsis, p. 321. 



Habitat. — Station 50, Soutli of Halifax, Nova Scotia, May 21, 1873; lat. 42° 8' N., 

 long. 63°39'W. ; 1250 fathoms; bine mud. One specimen, ^ , probably from the surface. 



North Atlantic, 140 miles north-west of the Irish Coast, July 2, 1869; lat. 56° 10' N., 

 long. 13° 16' W. ; surface ("Porcupine" Expedition). Two specimens. 



North Greenland (Steenstrup). Off" Martha's Vineyard, 87^ miles from Gray Head ; 

 388 fathoms (?) ^ ; two specimens. Off" the New England Coast, lat. 39° 27' 10" N., 

 long. 69° 56' 20" W.; 1346 fathoms (?)^ ; one specimen, Verrill. 



The Body (fig. 1) is elongated, tapering posteriorly ; the mantle is thin, enclosing an 

 enormous branchial cavity, only a small portion of which is occupied by the viscera; its 

 anterior border is transverse or projects slightly in the dorsal median line and at each 

 lateral attachment ; in the former of these positions the surface of the body is almost 

 continuous with that of the head, only the very slightest fold of the mantle marking 

 it off". The Jin is about half the length of the body and of an elongated cordate 

 shape, the form of the hinder margin being, however, slightly variable. The siphon is 

 triangular, and reaches to about the centre of the head ; on its dorsal wall, immediately 

 behind the aperture, are two low cushion-like papiUse in the middle line, and behind 

 these three long, pointed papillae arranged in a triangle with the apex directed forwards. 



Tlie Head proper is small, much smaller than either of the enormous globular eyes, 

 which occupy the whole of its two lateral surfaces. 



Tlie Arms are short, on an average about one-third the length of the body ; their 

 order of length is 3, 2, 1, 4; a toothed membrane extends along the arms, but forms only 

 a very small web between them (fig. 12). They are furnished with two rows of suckers, 

 most numerous and closely packed on the dorsal arms. The suckers (figs. 2—5) are 

 subgiobular, the proximal half of the globe being opaque and muscular, the distal 

 corneous and semitransparent. The suckers on the dorsal and ventral arms are 

 subequal, and also on the lateral arms for the proximal half of their length ; on the 

 third quarter are situated about eight large suckers, whose diameter fully equals that of 



1 The query is not intended to imply any doubt as to the accuracy of the observations, but merely as to whether 

 the specimen was taken at the bottom. 



