256 Eev. Canon A. M. Norman on British Mysidae. 



outer as long as cephalothorax. Antennal scale subrhom- 

 boidal, slightly longer than peduncle of antennules, three 

 times as long as broad ; external margin short, and this 

 ])ortion of the scale extended beyond the spine which termi- 

 nates the outer margin ; typically almost equal to half of the 

 total length, but sometimes proportionately shorter. Tarsus 

 of legs rather longer than preceding joint, consisting of five 

 to seven articulations ; nail slender, setiform. Telson in 

 form and armature nearly as in 8. spii-itus^ but the cleft 

 somewhat deeper and occupying about one fourth of the total 

 length. Inner uropod {not twisted at the extremity as in 

 S. sjji'ritus) with about sixteen well-separated rather slender 

 spines on the inner margin ; otolith large. Length 18 

 millim. 



Bab. Dredged in 40-50 fath. 5-8 miles off Balta, Shet- 

 land ; off Seaham, on the Durham coast ; off Valentia, Ireland 

 {A. M. N.) ; Banfi^ {T. Edward) ; 25 miles off May Island, 

 in the Firth of Forth, 85 fath. {Dr. John Murray) ; Firth of 

 Forth {T. Scott) : Mus. Nor. Liverpool Bay {A. 0. Walker). 



Distribution. Bukken, Bergen Fiord {A. M. N.) ; Drobak 

 and several places in South and West Norway, and among 

 Lofoten Islands {G. O. Sars) ] Denmark (Meinert) ; Con- 

 carneau, France {Bonnie7') ; mouth of the Seine {de Kerville) ; 

 Holland (P. P. C. Hoek, who records both S. ornata and 8. 

 Kervillei) . 



Mysis Kervillei is founded on large specimens of 8. ornata 

 in which the eye is proportionately larger, the antennal scale, 

 more especially the part before the extremity of lateral 

 margin, longer, and the number of articulations in tarsus of 

 legs seven. But among specimens kindly sent me by 

 M. de Kerville I find some with the spuae-point of the scale 

 on a level with the end of the peduncle of antenna and the 

 tarsus five-jointed ; and in specimens from other localities I 

 find considerable variation both in the scale and tarsus, the 

 latter in the front feet having sometimes seven articulations 

 besides the nail. 



3. Schistomysis Parheri^ sp. n. (PI. X. figs. 1-7.) 



Mandible having the penultimate and last joints of the 

 palp remarkably broad, the latter more so than in any other 

 member of the genus, scarcely more than twice as long as 

 broad. Eyes nearly globular, length scarcely exceeding the 

 breadth. Antennules ^\i\\ peduncles short, first joint equalling 

 the two following, second joint transversely narrowly trian- 

 gular, third joint expanded and very broad, breadth exceeding 



