252 Rev. Canon A. M. Norman on British Mysidoe. 



1883. Synmysis No7-7nani, flexuosa, cliamceleon, Benedeni, Mecnikowi, 

 and spinulosa, Czerniavsky, /. c. fasc. iii. pp. 58, 64. 



1887. M y sis flex uosa, Koehler, " Structure du Cerveau," Ann. Sci. Nat. 

 Zool. ser. 7, vol. ii. p. 159, pis. x., xi. 



1887. Mysis chmneleo, Nausbaum, " L'embryologie," Arch, de Zool. 

 Expl. et Gen. s6r. 2, vol. v. p. 123, pis. vi.-xii. 



Antennal scale very lonj>;, narrow and linear, more than 

 twice as long as peduncle of antennules, and seven to eight 

 times as long as broad j onter margin naked, terminating in 

 a forward-directed spine, the extreme apex of the scale scarcely 

 overtopping the point of that spine. Tarsus of legs six- 

 articulated, of last pair five-articulated, nail well developed. 

 Ttlson having cleft at extremity extending about one sixth of 

 total length of telson, moderately open ; about twenty-one to 

 twenty-seven spines on each side of telson. Inner uropods 

 with largely developed otolith ; inner side with about ten to 

 twelve spines, which are confined to the anterior two thirds 

 of the length and situated within the margin of the under 

 surface ; these spines gradually increase in size distally. 

 Length 25 millim. 



Hah. Mysis flexuosa is found on all parts of our coasts 

 between tide-marks in rock-pools, and in the Lamiuarian 

 zone. 



Distrihution. Norway {G. 0. Bars & A. M. N.) ; Sweden 

 [Goes); Baltic (Lindstrdm) ', Finland {Cajander) ; Den- 

 mark [Meinert) ; Holland {P. P. C. Hoek) ; Belgium {Van 

 Beneden) ', France [Brehisson &c.). [Black Sea [Greb- 

 nitzky) ?] * 



2. Macromysis neglecta (G. O. Sars). 



1869. Mysis neylecta, G. 0. Sars, Undersogelser over Cbristianiafjordens 



Dybvandsfauna, p. 37. 

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



I. Monogr. Mysider, p. 51, pi. xxvi. 

 1882. Sytimysis neylecta, Czerniavsky, I. c. fasc. ii. p. 26, fasc. iii. 



pp. 57 and 61. 



Very like M. flexuosa in all its parts, but distinguished by 

 the following characters : — Antennal scale about tive times 

 as long as broad and not twice the length of the peduncle of 

 the antennules, its apex slightly more extended, to about 

 twice the length of the spine of the external margin. Tarsus 

 of legs five-articulated, of last pair four-articulated. Telson 



* Grebnitzky (N. A.), Fauna of the Black Sea, 1873 (in Russian). 

 Marcusen (Job.), ' Zur Fauna des schwarzen Meeres,' also gives M. simui- 

 losus, cliamaleon, and vulyaris, and Podopsis Slabheri as living in the 

 Black Sea. 



