228 Proceedings of the Royal Physical Society. 



1842. RossiaJacoU, Ball, Proc. Roy. Irish Acad., ii., p. 193 ($). 

 1845. ,, Owenii, Loveii, Ofversigt k. Vetensk.-Akad. Forliaiidl., 



p. 121. 

 1853. ,, ,, Forbes and Hanley, Brit. Moll, iv., p. 223, pi. 



sss, fig. 1. 

 1886. ,, oweni, Hoyle, Chall. Ceph., p. 114; pi. xv., figs. 1-9. 

 Scandinavian Region. 



4. R. glaucopis, Loven, Ofversigt k. Vetensk.-Akad. "Forhandl., 



p. 121, 1845. 

 1S69. Rossia 2Jctpillifera, Jeffreys, Brit. Conch., v., p. 134.1 

 1878. ,, glaucopis, Sars, Moll. Reg. Arct. Norv., p. 337, pi. xxxii. 

 1886. ,, ,, Hoyle, Chall. Ceph., ]). 116. 



Scandinavian and Arctic Regions. 



5. R. Hyatti, Yll, Amer. Journ. Sci., xvi., p. 208, 1878; Ceph. 



N. E. Amer., p. 351, pi. xxvii., figs. 8, 9; pi. xxx., 

 fig. 1 ; pi. xxxi., figs. 1, 2; pi. xlvi., fig. 5, 1881. 

 New England Region. 

 G. R, sublevis, Yll. 



1878. Rossia suhlccvis, VU., Amer. Journ. Sci., xvi., p. 209. 

 1881. ,, sublevis, Vll., Ceph. N. E. Amer., pp. 354, 419, pi. xxx., 

 fig. 2; pi. xxxi., fig. 3 ; pi. xlvi., tig. 4 ; pi. 

 xlvii., figs. 2-4. 

 1886. ,, ,, Hoyle, Chall. Ceph., p. 117. 



New England and Patagonian Regions. 



7. R. brachyura, Vll, " Blake" Suppl, p. 110, pi iil, fig. 2, 1883. 



West Indian Region. 



8. R. MoUeri, Stp., Hectocotyl, p. 198, pi il, fig. 1, 1856. 



Arctic Region. 



9. R. tenera (Vll), Hoyle. 



1880. IleteroteiUhis tenera, Vll, Amer. Journ. Sci., xx,, p. 392, 



1881. ,, ,, Vll, Ceph. N. E. Amer., p. 357, pi xlvi, 



figs. 2, 3 ; pi xlvii. , fig. 5. 

 1883. „ ,, Vll, "Blake" Suppl, p. 111. 



1886. Rossia tenera, Hoyle, Chall Ceph., p. 118. 

 New England and West Indian Regions. 



10. R. patagonica, E. A. Sm., Proc. Zool Soc. Lond., p. 22, pi 



iil, fig. 3. 

 1886. Rossia patagonica, Hoyle, Chall Ceph., p. 119, pi xv., figs. 10-18. 

 Patagonian Region. 



Ball are exactly those which mark out the sexes ; the males have enlarged 

 suckers in the two outer series on the lateral arms, while the females have 

 smaller equal suckers, and the hody is more elongated, or, what is the same 

 thing, the arms are " proportionahly shorter." 



1 The examination of Jeffreys' type specimen has enahled me to ascertain 

 its identity with Loven's species in the most satisfactory manner. 



