Land, Fresh- Water, and Marine Crustacea. 129 



14 Diastylis lucifera (Kroyer). 



1841. Cuma lucifera, Kroyer, Naturh. Tidsskr., 1 R., B. iii. p. 527. 



Habitat. — It has been taken very sparingly off the west 

 side of Inchkeith, and at Stations V. and VII.; not common. 



15. Diastylis rostratus (Goodsir). 



1843. Alauna rostrata, Goodsir, Edin. New Phil. Jour., vol. xxxiv. 



p. 130, pi. iv. figs. 1-10. (See also Proc. Roy. Phys. Soc, 



vol. ii. p. 10.) 

 1869. Diastylis Icevis, Norman, 1 Brit. Assoc. Rept. (1868), p. 27. 

 1900. ,, rostratus, G. O. Sars, Crustacea of Norway, p. 51, 



pi. 39. 



Habitat— Filth of Forth (Goodsir). Off Fidra, in 12 

 fathoms (Henderson). I have obtained Diastylis Icevis, 

 Norman, at Experimental Stations III., V., VI., and VII., 

 but always very sparingly. 



16. Diastylis spinosa, Norman. 



1869. Diastylis spinosa, Norman, Brit. Assoc. Rept. for 1868, p. 271. 



Habitat. — Off North Berwick, in 10 to 15 fathoms ; 

 captured in March 1891, but not identified till 1900. 

 The species was described from specimens taken by Norman 

 in Shetland in 1863. It was subsequently discovered in the 

 Moray Firth by Thomas Edward of Banff, and in the Firth 

 of Clyde by Dr Robertson of Millport, Cumbrae. 



Family Pseudocumid^e. 

 Genus (10) Pseudocuma, G. O. Sars, 1864. 



17. Pseudocuma cercaria (Van Beneden). 



1861. Leucon cercaria, Van Beneden, Rech. sur la Faune litt. de 

 Belgique (Crust.), p. 85, pi. iv. 



Habitat. — Common, and generally distributed in the Firth. 



18. Pseudocuma similis, G. O. Sars. 



1900. Pseudocuma similis, Gr. O. Sars, Crustacea of Norway, vol. iii. 

 p. 76, pi. liii. 



Habitat. — Firth of Forth, apparently rare, but it resembles 



1 Canon Norman considers that the Alauna rostrata of Goodsir is not the 

 same as his Diastylis laivis, but is rather synonymous with Krbyer's 

 D. RathTcei as stated above. If that is so, D. laivis will have to be restored 

 for this species. 



VOL. XVI. O 



