224 Proceedings of the Royal Physical Society. 



2. E. cirrosa (Lmk.), d'Orb.i 



1776. Sepia octojwdia (?), Pennant, Brit. Zool., iv., p. 53, pi. xxviii., 



fig. 44. 

 1799. Octoiyus cirrhosus, Lmk., Mem. Soc. Hist. ISTat. Paris, i., p. 21, 



pi. i., fig. 2. 

 1814. Ozoena Aldrovandi, Raf., Precis decouv. somiol., p. 29. 

 1827. Octopus ventricosus, Grant, Edin. N. Phil. Jouru., p. 309. 

 1838. Eledone cirrhosus, d'Orb., Cepli. acet., p. 79, pi. ii. 

 1843. ,, Pennantii, Macgillivray, Moll. Anim. Scot., p. 31. 

 1843. ,, Aldrovandi, Macgillivray, op. cit, p. 32. 

 1851. ,, ,, Ver., Cepli. medit., p. 12, pis. ii. , iii. 



1851. ,, Genei, Ver., op. cit, p. 15, pi. i. 

 1886. ,, cirrosa, Hoyle, Chall. Ceph., p. 102. 



Scandinavian, Lusitanian, and Mediterranean Regions. 



3. E. verrucosa, Vll., "Blake " Rep., p. 105, pis. v., vi., 1881 ; 



Ceph. N. E. Amer., p. 380, pis. lii., liii., 1881. 

 1886. Eledone verrucosa, Hoyle, Chall. Ceph., p. 104. 



Atlantic and Pacific Oceans ; New England Region. 



4. E. rotunda, Hoyle, Diagnoses I., p. 230, 1885; Chall. Ceph., 



p. 104, pi. viii., figs. 4-6, 1886. 

 Pacific and Southern Oceans. 



5. E. brevis, Hoyle, Diagnoses I., p. 230, 1885; Chall. Ceph., 



p. 105, pi. viii., fig. 7, 1886. 

 Atlantic Ocean. 



6. E. Halliana, Rochebr., Monogr. Eledonidte, p. 162, 1884. 



Lusitanian Region. 



Hoylea, de Rochebrune, 1886. 

 Hallia, Val., MS. 

 1. H. sepioidea (Valenciennes, MS.), Rochebr. 



1 Of this species I have examined a considerable number from our own coast 

 as well as some from other localities, and feel pretty confident that the table 

 of synonyms above given, though long, is correct. I have compared some 

 specimens of Eledone Aldrovandi received from the Zoological Station at 

 Naples, with young specimens from our own coast, and can detect absolutely 

 no points of specific importance between them. Older specimens, as compared 

 with the young ones, are proportionately longer in the body, the tubercles on 

 the back are more prominent, and the arms better developed. Not having 

 seen a male, I have been unable to confirm Steenstrup's observation regarding 

 the structure of the extremities of the arms in that sex (Hectocotyl. , p. 206, 

 Tav. ii., fig. 6). He found in a specimen from Bergen that the suckers 

 ceased a little below the tip, and were replaced by pairs of minute cirri ; it 

 would be very desirable to repeat this observation, because Steenstrup re- 

 marks that his specimen was in poor condition, and because if the male 

 Eledone cirrosa really possesses these paired threads it would tend to prove 

 that Eledone Aldrovandi was not identical with it. 



