336 



BULLETIN OF THE BUREAU OF FISHERIES. 



Family BRACHIOTEUTHID/E Pfeffer 1908. 



TrackeloteutkidcE Pfeffer 1900, p. 152, 174. 

 BrachuHeuthidcE Pfeffer 1908, p. 62, 78. 

 Tracheloteuthidce Chun 1910, p. 205. 

 BrachioteuthidcE Pfeffer 1912, p. 345. 



Body slender, loliginiform. Fins large, rhombic. None of the suckers on either arms or tentacles 

 transformed to hooks; arms with two rows of suckers; tentacles with four or more rows. No fixing 

 apparatus. Funnel locking cartilages simple and linear. Gladius slender, con- 

 sisting for the most part of little but the rhachis; terminating in a long pointed 

 cone. 



Genus BRACHIOTEUTHIS Verrill 1881. 



Brackioteuthis Verrill 1881, p. 405. 

 Brackioteuthis Pfeffer 1900, p. 174, 176. 

 Brackioteuthis Chun 1910. p. 206. 

 Brackioteuthis Pfeffer 1912, p. 346. 



Characters af genus identical with those of the family, for the latter becomes 

 monogeneric upon the union of Tracheloteuihis with Brackioteuthis, as is now very 

 generally advocated. 



Type. — Brackioteuthis Beanii Verrill 1881 (designation); a species of the New 

 England region. 



Subgenus Tracheloteuthis Steenstrup 1882. 



Trackeloteutkis Steenstrup 1882, p. 294. 

 Verrilliola Pfeffer 18S4, p. 22. 

 Enlomopsis de Rochebrune 1884, p. 15. 

 Trackeloteuthis Hoyle 18S6, p. 163. 

 Tracheloteutkis Pfeffer 1900, p. 174, 175. 

 Trackeloteuthis Pfeffer 1908, p. 78. 

 Brackioteuthis (pars) Chun 1910, p. 206. 

 Brachioteuthis {Tracheloteuihis) Pfeffer 1912, p. 355. 



Mantle very thin, membranous. Entire animal nearly colorless except for 

 a few chromatophores on the head and a very few scattered ones on the body. 

 Fins large, rhombic, but never as long as half the mantle length. 



Type. — Trackeloteuthis Riisei Steenstrup 1882 (species first mentioned); a 

 species of almost cosmopolitan distribution. 



Brachioteuthis (Tracheloteuthis) riisei (Steenstrup 1882). 



Tracheloteutkis Riisei Steenstrupi882 p. 294. 



Tracheloteuthis Behnii Steenstrup 1882, p. 294. 



Tracheloteutkis riisei Hoyle 1886, p. 36, 164, 213, 221, pi. 28, fig. 6-12. 



Tracheloteutkis Behnii 'Weiss 1888, p. 85, pi. 10, fig. 1-4. 



Tracheloteutkis riisei Lonnberg 1S97, p. 603 (account of funnel organ). 



Tracheloteutkis riisei Pfeffer 1900, p. 175. 



Tracheloteuthis Riisei Hoyle 1905a, p. 93, pi. 14, fig. 1-5- 



Tracheloteutkis riisei Pfeffer 1908, p. 79. fig. 93-95. 



Trackeloteuthis Riisei Massy 1909, p. 30. 



Tracheloteuthis riisei Berry 1909, p. 419 (mere locality record). 



Brackioteuthis Riisei Chun 1910, p. 207. 



Brackioteuthis (Tracheloteutkis) Riisei Pfeffer igi2, p. 355, pi. 26. fig. 1-20; pi. 27, fig. 1-9. 



Fig. 37. — Brachioteuthis 

 {Trachelaleutkis) riisei. 

 dorsal view of specimen 

 [280], from station 3878, 

 X 2. Drawn by R. 

 L. Hudson. 



Animal small, pelagic, hyaline, extremely slender and graceful. Mantle very thin, inflated, 

 elongate -cylindrical; swollen at the middle and tapering to an acute slightly attenuate point posteriorly; 

 pallial chamber capacious, very scantily occupied by the delicate viscera. Mantle opening very wide, 

 due largely to the extreme length and narrowness of the neck; anterior margin sharply angled in the 

 medio-dorsal line, the ventro-lateral projections also well marked but somewhat less pronounced. 



