Rev. Canon A. M. Norman on British Mysidie. 255 



subequal to or rather longer than the two distal combined ; 

 flagella unusually short, the outer not halt" the length of 

 cephalothorax. Antennal scale narrow, subrhomboidal, 

 rather longer than the peduncles of the antennules, more than 

 four times as long as broad, one third of total length extended 

 beyond the spine which terminates the outer margin ; termi- 

 nation of the peduncle of flagellum reaching that spine. 

 Tarsus of legs subequal in length to the preceding joint, 

 slender, composed of 7-9 articulations ; no nail. Telson 

 constricted near the base, beyond which constriction the sides 

 are gently arched ; cleft shallow and broad, scarcely exceed- 

 ing one sixth of total length of telson, external margins with 

 25-30 small spines. Inner uropods subequal in length to the 

 telson, curiously twisted and bent inwards at the extremity ; 

 inner margin as far as the twist just referred to densely 

 packed with very numerous setiform spines, which overlie 

 each other ; otolith larii;e. 



Hab. Off Balta, Shetland, in 40-50 fath. ; Blackball 

 Rocks, CO. Durham, tide-marks ; Jersey [A. M. N.) ; Banff 

 {T. Edicard)] Firth of Forth {T. Scott) : Miis. Nor. 



Distribution. Professor G. O. Sars once observed this 

 species swimming by the shore at Lister, on the Ohristiania 

 Fiord, in enormous shoals. North Sea, lat. 56° 50' N., long. 

 5" 10' E. {Kinberg, fide Goes) ; Denmark [Meinert) ; Holland 

 (P. P. C. Iloek) ; Boulonnais, France {Oiard) *. 



2. Scliistomysis ornata (G. O. Sars). 



1864. Ml/sis ornata, G. O. Sars, Beret, om en i Somin. 1863 foretagen 



Zool. Reise, p. 18. 

 1809. Mysis ornata, Norman, " Last Report Dredging Shetland Isles," 



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

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



I. Monogr. Mjsider, p. 62, pi. xxix. 

 1883. Synmysis ornata, Czerniavsky, /. c. fasc. iii. p. 56. 

 1885. Mysis Kcrvillei, G. 0. Sars, in de Kerville, " Crust. Schizopodes 



de I'estuaire de la Seine," Bull. Soc. des Amis des Sci. Nat. de Rouen, 



p. 92, pi. V. 



General form less slender than that of 8. spiritus ; anterior 

 portion of cephalothorax nearly as wide as the earlier segments 

 of pleon ; ornamented with red, yellow, or brown branching 

 pigment-spots. Ei/es short and large, scarcely longer than 

 broad ; cornea largely developed. Antennules having the 

 peduncle of moderate length and stoutness ; flagella long, the 



* See Giard (A.), " Le Laboratoire de Wimereux en 1888, Reclierches 

 Fauniques" (Bull. Sci. de la France et do la Bulgique, 1888, p, 220), for 

 this and other references to liim. 



