772 THE VOYAGE OF H.M.S. CHALLENGER. 



1855. Leueoihoe, Liljeborg, Ofv. af Kongl. Vet.-Akad. Forh. 



1857. „ Speuce Bate, Ann. and Mag. Nat. Hist., ser. 2, vol. xix. 



1857. „ White, Popular Hist. Brit. Crust., p. 188. 



1859. „ Bruzelius, Skand. Amph. Gamm., p. 95. 



1860. „ Boeck, Forh. ved. de Skand. Naturf., 8de M0de. 

 1862. ., Spence Bate, Brit. Mus. Catal. Amph. Crust., p. 156. 

 1862. „ Bate and Westwood, Brit. Sess. Crust., p. 269. 

 1865. ,, Lilljeborg, On the Lysianassa Magellanica, p. 18. 

 1870. ,, Boeck, Crust, amph. bor. et arct., p. 77. 



1876. „ Boeck, De Skand. og Arkt. Amph., p. 506. 



1882. „ Haswell, Catal. Australian Crust., p. 247. 



1886. „ Gerstaecker, Bronn's Klassen und Ordnungen, Bd. v. Abth. ii. p. 506. 



For the original definition see Note on Leach, 1813 (p. 84). Boeck's definition is as 

 follows : — 



" Mandibles apically much dilated and dentate ; molar tubercle wanting. 



" First Maxillie with the inner plate very small. 



" Maxillipeds with the outer plate almost obsolete. 



" Upper Antennse without an accessory flagellum. 



" First Gnathopods with wrist ovate, at the lower hinder angle produced into a long, 

 slender, curved, acuminate process ; the hand elongate, hnear, armed with spines on the 

 hind margin. 



" Second Gnathopods having a long heel to the wrist; the hand very large, sub-chelate. 



" The Perieopods slender. 



•'' Third Uropods with a tolerably long peduncle. 



" Telson not cleft." 



A rudimentary secondary flagellum is present on the upper antennse, at least in some 

 species of the genus. 



Leucothoe miersi, n. sp. (PL XLVL). 



Rostrum minute, lateral lobes of the head prominent ; the postero-lateral angles of 

 the first three pleon-segments scarcely acute. 



Eyes oval, situated near the lateral lobes of the head, light-coloured in the specimen 

 preserved in spirit, the ocelli small. 



Upper Antenna. — First and second joints long, subequal in length, the first with a 

 small apical tooth, the second fringed with a few setules ; the third narrow, about one- 

 fourth the length of the second ; the flagellum slender, shorter than the peduncle, with 

 seventeen joints on one antenna, and twenty-one on the other in the specimen here 

 described, the distal joints much longer than those at the base ; the secondary flagellum 

 a small rudiment, consisting of a single joint, much shorter than the short first joint of 

 the primary. 



