Rev. Canon A. M. Norman on British Mysklai. 261 



Maaninga sjo, Piiijiinne, Pielisjarvi, and other hikes in Fui- 

 hind {Nordquist) *. 



In America in Lake Michigan {Stimpson) ; Lake Superior, 

 in 12-148 fath. (>S'. /. Smith), 



Genus 13. Neomysis, Czerniavsky, 1882. 

 =Heteromysisy Czerniavsky, 1882 (nee Smith). 



Antennal scale subuhite, very long and narrow, six to ten 

 times as long as broad (running out into an acute spine-like 

 termination), ciliated on both margins. Labrum acutely 

 pointed in front. Legs with multiarticulate tarsus ; posterior 

 pairs more strongly built than the anterior and with more 

 articulations in tarsus. Telson subtriangular, elongated ; 

 apex entire, pointed ; margins spined, the spines subequal, no 

 smaller spines alternating with larger. Li the male tlie third 

 as well as the first, second, and fifth pleopods are simple, and 

 resemble the same organs in female : fourth pleopod with a 

 short peduncle, not much longer than broad : inner branch as 

 usual in Mysinee; outer branch consisting of only two articu- 

 lations, the first very long, the second rather short, from its 

 end spring two subequal, spiniform, ciliated filaments of no 

 great length. 



Jlijsis aivatschensis, F. Brandt, M. americana, Smith, 

 Ileteromysis miralnlisj Czern., and H. intermedia^ Czern., are 

 referable to this genus. 



Neomysis vulgaris (J. V. Thompson). 

 (PI. X. figs. 12, 13.) 



1828. Mt/sis vulyaris, J. V. Thompson, Zoolog. Researches, i. p. 30, 



pi. ii. 

 1844. Ml/sis vul(/aris, Zaddach, Synops. Crust, prussicorum prod. p. 3. 

 18o3. Ml/sis vulyaris, Jkll, Brit. Stalk-oyed Crust, p. 339. 

 18(30. Ml/sis vulyaris, P. J. Van Beneden, Keeher. sur la Faune litto- 



rale de Belgique, Cru.stac<5s, p. 13, pi. i. 

 1801. 3Iysis vulyaris, Kroyer, Nat. Tidssk. 3A'e Rgekke, vol. i. p. 21. 

 1879. Mysis vulyaris, G. 6. Sars, Carcinol. Bidrag til Norges Fauna, 



I. Moudgr. Mysider, p. 24, pi. i. 

 1882. Neomysis vulyaris, Czerniavsky, I. c. fasc. ii. p. 2-3, fasc. iii. p. 81, 



pi. xviii. figs. 18-22, pi. xxx. figs. 12-14. 



Antennal scale of great length and very narrow, lanceo- 

 late, nine or ten times as long as greatest breadth and three 



* Nordquist (Osc), " Bidrag till kaun. om Crustacdfauna, 1. Nagra af 

 Mellersta FiuLinds Sjoar, 1886," Act. Soc. pro Fauna et Flora Fennica, 

 iii. u. 2 ; and " Bid. till kiiim. om Bottniska vikens och norra Osterjoua 

 evertebratfauua," Soc. pro Fauna et Flora Fennica, 17 (I8I1O). 



