132 Canon A. IM. Norman on British AmpMpoda. 



Genus 4. Euthemisto^ Bovallius. 

 4. Euthemisto compressa (Goes). 



1865. Themisto conipressa. Goes, " Crust. Ampbip. Maris Spetsbergiam 

 alluentis, etc.," CEtVers. K. Vet.-Akad. Forb. p. 533, pi. xli. fig. 34. 



1878. Lestrigonus sjnnidorsalis, Spence Bate, " Two new Crustacea 

 from tbe Coast of Aberdeen," Ann. & Mag. Nat. Hist. ser. 5, vol. i. 

 p. 411, fig. 2, and as Hyperia spinidorsalis, id. ibid. vol. ii. p. 48.->. 



1892. Etiihetju'sto coinpressa, l:iorma.n, "Rare Crustacea on tbe York- 

 shire Coast," 'Tbe Naturalist,' p. 175. 



1895. Euthemisto compressa, Sars, (142) p. 12, pi. v. fig. 2. 



Bovallius lias joined Euthemisto hispinosa, Boeck, with 

 this species ; but the remarkable spination of the propodos of 

 the tliird perseopods (see Sars, pi. vi. fig. 2,;?. 5), which 

 is the chief distinguishing character of that species, as indi- 

 cated by Sars, and as I find in Greeidand specimens of 

 E. hi'spji'nosa, seems to distinguish them. 



Hab. Redcar, Yorkshire, in extraordinary profusion, thrown 

 up upon the beach, April 4, 1892 (T. //. Nelson) : Mas. JSfor. 

 Aberdeen {Spence Bate) ; 70-80 miles E. by N. of mouth of 

 the H umber (T. S.). 



Distrib. Davis Strait and Greenland, * Valorous,' 1875 ; 

 lat. 52° 33' N., long. 26° 44' W., and lat. 59° IG' N., 

 long. 37° 16' W., ' Valorous,' 1875; Faroe Channcd ' Triton,' 

 1882 {Sir J. Murray) : Mas. Nor. Norway and Jan Mayeu 

 {G. 0. Sars). 



5. Euthemisto libellula (Mandt). 



1822. Gammarus Zi6ft//tJa, Mandt, Observationes in Historian! Naturalem 



et Anatomiam Comparatam in itiuere Groelandise factse, p. 32. 

 1838. Themisto crassicornis, Kroyer, Grbulands Amtipoder, p. 295, 



pi. iv. fig. 17. 

 1838. Themisto arctica, id. ibid. p. 291, pi. iv. fig. 16. 

 18G9. Themisto crassicornis, Bate & Westwood, (1) vol. ii. p. 522. 

 1887. Euthemisto Koi-de7iskidldi, Bovallius, " Arctic and Antarctic 



Hyperids," * Vega ' Exped. Vetensk. lakttagelser, vol. iv. p. 570, 



pi. xlvii. figs. 104-110. 

 1895. Euthemisto libellula, Sars, (142) p. 13, pi. vi. fig. 1. 



It is the Themisto libellula of Goes and the Euthemisto 

 libellula of Bovallius. 



ffab. Banff {T. Edivard, fide Bate). 



Distrib. Davis Strait and Greenland, ' Valorous,' 1875 ; 

 Jan Mayen, Austro-Hungarian Exped. : Alus. Nor. In shoals 

 on north and east coasts of Finmark (G. 0. Sars); and 

 Arctic region generally from Siberia to Greenland. 



A good specific character by which the species may be at 

 once recognized is that the nail of the third and longest 

 pereeopods bears a comb-like set of long spines. 



