254 Eev. Canon A. M. Norman on British Mysidee. 



Distribution. Kors Fiord; Bukken, Bergen Fiord ; Lervig 

 and other places in tlie Hardanger Fiord ; Floro, — all in Nor- 

 way ; Klosterelv Fiord, E. Finmark {A. M. N.) ; Baltic 

 Sea {Loven) ; Bergen {Lilljeborg) : Mus. Nor. Many 

 localities from Christiania to Vadso (G. O. Sars) ; Sweden 

 {Ooes) ] Denmark {Meinert) ; Baltic {Lindstrom) ; Murman 

 Sea {Jarzynsky) ; Spitsbergen {Kroyer). It is a shallow- 

 water species. 



Genus 11. SCHISTOMYSIS, gen. nov.* 



= Synv^ysis (partim) and Austromysis, Czemiavsky. 



Antennal scale subrhomboidal or lozenge-shaped, length to 

 breadth as 2^-4| to 1 ; outer margin not ciliated, with a 

 spine-like tooth at the extremity f ; the end of the scale very 

 oblique and reaching far beyond this spine-point. Maxilli- 

 peds not unguiculate. Legs having the tarsus 5-9-articulated, 

 terminating in a setiform spine. Telson cleft at the extre- 

 mity, cleft serrated. Fourth pleopods in male very long : 

 peduncle and inner ramus as usual in Mysinte ; outer ramus 

 composed of five or six \ articulations and then divided into 

 two long flagella, both of which are ciliated on the distal 

 portion, the outer the longer. 



1. Schistomysis spiritus^ Norman. 



1860. Mysis spiritns, Norman, Ann. & Mag. Nat. Hist. ser. 3, vol. vi. 



p. 431, pi. viii. fig. 1 ; and Trans. Tyneside Nat. Field Club, vol. iv. 



p. 329, pi. xvii. fig. 1. 

 1866. Mysis spiritus, G. O. Sars, Beret, om en i Somm. 1865 foi-etagen 



Zool. Raise, p. 19. 

 1869. Mysis sjnritus, Norman, " Last Report Dredging Shetland 



l8les,""Brit. Assoc. Rep. for 1868, p. 266. 

 1879. Mysis sjnrittis, G. O. Sars, Carcinol. Bidrag til Norges Fauna, 



I. Monogr. Mysider, p. 58, pi. xxviii. 

 1883. Synmysis spiritus, Czerniavsiy, I. c. fasc. iii. p, 56. 



Form very slender, perfectly hyaline and transparent, 

 almost entirely free from pigment-markings ; anterior portion 

 of cephalothorax very narrow, narrower than first joints of 

 pleon. Eyes cylindrical, narrow ; cornea small, projected 

 outwards and reaching far beyond the sides of cephalothorax. 

 Antennules with greatly elongated peduncle, basal joint 



* o-xto"ros, cleft, with reference to the two flagella in which the fourth 

 pleopod of male terminates. 



t Tu Macromysis the similar process is an articulated spine ; in this 

 genus it seems to be not articulated, but a process of the scale itself. 



X The very short first articulation generally indistinct. 



