,332 Canon A. M. Noiraan on 



8. Sphyrapus tudes, Norman & Stebbing. 



1886. Sphyrapus tudes, Norman & Stebbing, (86) p. 99, pi. xxii. fig. 1. 

 Hah. < Porcupine,' 1869, Stat. 23 a, lat. 56° 13' N., long. 

 14° 18' W., to the south of Rockall, in 420 fath. 



Fam. II. Tanaidse. 

 Genus 1. Tanais, M. -Edwards. 



9. Tanais Cavolinii, H. M. -Edwards. 



1828. Tanais Cavolinii, H. Milne-Edwards in Audouin & Milne- 

 Edwards's Precis d'Entomologie, vol. i. pi. xxix. fig. 1. 



1840. Tanais Cavolinii, H. Milue-Eewards, Hist. Nat. des Crust, 

 vol. iii. p. 141, pi. xxxi. fig. 6. 



1842. Tanais tomentosus, Kroyer, (52) p. 183, and Voyage en Scan- 

 dinavie &c. (1849 ?) pi. xxvil figs. 2a-q. 



1843. Crossurus vittatus, Rathke, (89) p. 39, pi. i. figs. 1-7. 

 1866. Tanais vittatus, Bate & Westwood, (1) vol. Li.' p. 125. 



1875. Tanais vittatus, Macdonald, Trans. Linn. Soc. ser. 2, vol. i. 



(Zoology) p. 67, pi. xv. 

 1881. Tanais vittatus, Harger, (37) p. 418, pi. xiii. figs. 81, 82. 



1896. Tanais tomentosus, G. O. Sars, (105) p. 12, pi. v. 



1897. Tanais Cavolinii, A. Dollfus, (25) p. 207. 



1898. Tanais Cavolinii, A. Dollfus, (26) p. 35. 



Hah. Tide-marks among weeds, Farland Point, Cumbrae, 

 N.B., and Tobermory in the Isle of Mull (A. M. N.) ; May 

 Island, Firth of Forth, and Dunbar (Henderson). Bate & 

 Westwood record it from Berwick (Dr. Johnston) and Pol- 

 perro, Cornwall (Laughrin) ; Jersey (Koshler) ; Netley 

 Hospital Pier and Alum Bay, Isle of Wight (Macdonald). 



Distrih. It is found on the coast of Norway (Rathke &c.) ; 

 Oresund (Kroyer); West France (Chevreux); Mediterranean, 

 in many places (Chevreux, fide Dollfus) ; Azores (Th. Bar- 

 rois) ; Greenland (Hansen). 



M. A. Dollfus has described several closely allied species 

 from the Mediterranean — one with the uropods three-jointed, 

 which is the species of which the above are synonyms, the 

 true T. Cavolinii of Milne-Edwards ; and three others which 

 agree in having the uropods four-jointed and differ from each 

 other in slight particulars. It is probable that the form 

 which Prof. G. O. Sars has described in his memoir on the 

 Mediterranean Isopoda Chelifera (103, pi. ix. figs. 1-3) is 

 referable to T. Chevreuxi, A. Dollfus. It differs from 

 T. Cavolinii ( = T. vittatus) in having the body more slender 

 and the uropods four-jointed. 



This species may hereafter be found on our southern 

 coasts, and it is possible that the " very slender form " which 



