Rev. T. 11. E,. Stebbing on Arctic Crustacea. 11 



Rhoda inermis (Kroyer). 



1846. ? Thysannpoda inermis, Kroyer, Gaimard's Voy. du Nord, Crust. 



pi. vii. figs. 2 a-t. 

 1882. Euphausia inermis, Sars, Forh. Selsk. Christian, no. 18, p. 51, 



pi. i. fig. 15. 



1885. Boreophausia inermis, Sars, 'Challenger' Reports, vol. xiii. 

 Schizopoda, p. 64. 



1886. Boreophausia inermis, Sars, Norwegian North- Atlantic Exp., 

 Crust, vol. ii. p. 13. 



1887. Boreophausia inermis, Ilauseu, Malac. Grosnl. ojcid., Vid. Medd. 

 p. 53. 



1892. Boreophausia inermis, Norman, Ann. & Mag. Nat. Hist. ser. 6, 

 vol. ix. p. 401, 



1893. Rhoda inermis, Stabbing, Hist. Crust, p. 263. 



Norman having identified the Boreophausia Raschii 

 (M. Sars) with Rhoda Jardineana^ Sim, 1872, it seems clear 

 that the generic name Boreophausia, proposed by Sars in 

 1883, must give way to the much earlier name Rhoda. 



Mr. Bruce's specimens of Rhoda mermis were taken on 

 two occasions iu July by the tow-net at night. 



Fam. Mysidae. 



Genus Mysideis, Sars, 1869. 



1869. Mysideis, Sars, Undersogelser over Christianiafjordens Dybvands- 

 fauna, p. 28. 



1870, 1879. Mysideis, Sars, Monogr. Norges Mysider, pt. 1, p. 9, pt. 3, 

 pp. 1, 110. 



On page 9 of the ' Monograph ' Sars assigns Mysideis to 

 the group in which all the pleopods of the male are unlike 

 those of the female, and to the division of that group which 

 has the molar of the mandibles distinct, separating the genus 

 from its companions by the character that the incisive lobes 

 of the first maxillje are only two instead of three. The full 

 generic character in pt. 3, page 1, and the subsequent specific 

 descriptions and figures, agree with the original account in 

 1869 in applying the character to the second maxilla?, to 

 which alone it could be appropriate. From the type species, 

 Mysideis insignis, the M. grandis of Goes is very clearly 

 distinguished by the subacute or tubercular projection in the 

 middle of the outer margin of the first maxillae, as well as by 

 the truncate apex of the telson. 



Mysideis grandis (Goes) . 



1864. Mysis f/randis, Goes, Crust, podophth. Sueciae etc., CEfv. Vet.- 

 Akad, Forh. p. 176 (extr. p. 16). 



