474 Rev. Canon Norman's Revision 



Suborder II. PROSTHARSENIA. 



Section 1. ANOPROSTHARSENIA. 



Tribe I. Oiqopsida. 



Fam 2. Cranchiidae. 



Genus Taonius, Steenstrup. 



9. Taonius hyperboreus, Steenstrup. 



Leachia hyperborea, Steenstrup, Ann. & Mag. Nat. Hist. ser. 2, xx. 



(1857), p. 96, note. . 

 Taonius hyperboreus, Steenstrup, Overs. K. D. Vid. Selsk. Forhand. 



1861, p. 83. 

 ? Dosmoteuthis tenera, Verrill, Trans. Connect. Acad. Sci. v. (1881), 



p. 412, pi. lv. tig. 2, pi. lvi. fig. 3. 

 Leachia eilipsoptera, Carpenter, Jeffreys, and Thomson, ' Porcupine ' 



Report, Proc. Roy. Soc. 1870, p. 423. 

 Taonius hyperboreus, Hoyle, Report ' Challenger ' Ceph. 1886, p. 101, 



pi. xxxi'i. rig. 12, and pi. xxxiii. tigs. 1-11. 



' Porcupine,' 1869. Two specimens at the surface 140 miles 

 north-west of the coast of Ireland, lat. 56° 10' N., long. 15° 

 16' W. {vide Hoyle, < Challenger ' Ceph. p. 209). 



Distribution. An oceanic species, the known distribution of 

 which is North Greenland {Steenstrup) , North-east America 

 {Verrill), off Halifax, Nova Scotia (' Challenger'). 



Fam. 3. Onychoteuthidse. 



Genus Onychoteuthis, Lichtenstein, 1818. 



Body long, subcylindrical ; fins terminal, large, triangular, 

 united dorsally, rhomboidal in their united form. Eyes large 

 and prominent. Arms having two rows of suckers, which 

 are furnished with horny but not denticulated rings. Tenta- 

 cular arms long and strong, their clubs furnished at the base 

 with a group of suckers, but the greater part of their length 

 armed with two rows of strong grasping hooks. Radula very 

 like that of Loligo, formula 3 — 1 — 3 ; all the teeth unicuspi- 

 date and simple, central and innermost lateral smaller than 

 the others. 



Pen with a long pointed dorso-posterior process. 



I am not aware that the male of this genus has been 

 described ; but in the allied genus Enoploteuthis according to 

 Clans hectocotylization takes place in one of the fourth or 

 ventral arms, and the spermatophores are deposited in the 

 ventral branchial cavity of the females. 



