16 -R-EY. T. E. E. STEBBING OX THE 



Ukothoe maeinus, Sp. Bate. (Plate II.) 



1857. Sulcatur marinus, Sp. Bate, Synopsis of Brit. Edr. Crust., Ann. & Mag. Nat. Hist. ser. 2, 



vol. six. p. 140. 

 183". „ „ "VMiite, Popular History of British Crustacea, p. 175. 



1862. Urothoe marinus, Sp. Bate, Brit. Mus. Catal. Amph. Crust, p. 115, pi. six. fig. 2. 

 1862. „ „ Bate & Westwood, British Sess. Crust, vol. i. p. 195, woodcuts. 



1869. „ „ ?\Sir. pectinatus, Grube, Mitth. iiber St. Vaast-la-Hougue, Abb. der schles. 



Gesellsch. fiir vaterl. Cultur, 1868-9, p. 119. 

 1869. „ „ Norman, Last Report on Dredging among the Shetland Isles, p. 279. 



1876. „ marina, Giard, Comptes Kendus, Jan. 3, p. 76; Ann. & Mag. Nat. Hist. ser. 4, 



vol. xvii. p. 261. 



1876. „ marinus, Stebbing, Ann. & Mag. Nat. Hist. ser. 4, vol. xvii. p. 344. 



1877. „ marina, Meinert, Crust. Isop. Amph. et Decap. Danite, p. 107. 



1884. ,, marinus, Chevreus. Assoc, pour I'av. des Sciences, Congres de Blois, Amph. du 



Croisic, p. 313. 

 1887. „ ,, Barrois, Morph. des Orchestics et liste Amph. du Boulonnais, p. 16. 



1887. „ marina, Bonnier, Catal. Crust. Malac. Concarneau, p. 79. 



1887. „ „ Chevreux, Crust. Amph. Bretagne, Bull. Soc. Zool. de France, t. xii. extr. 



pp. 10, 34, 36. 



1888. „ „ Chevreux, Dragage de V Hirondelle au large de Lorient, p. 1. 

 1888. „ „ Chevreus, Amph. rec. aux env. de ChercheU, extr. p. 5. 

 1888. „ marinus, Robertson, Catal. Amph. and Isop. of Clyde, p. 30. 



The sides of the rostrum not forming an obtuse angle, but the apex not acute. The 

 postero-lateral angles of the second pleon-segment acutely produced, but not those of 

 the first or the third segment. 



Ei/es very large in the adult male, nearly meeting on the top of the head. 



Vjjper antennce. First joint thicker, but scarcely longer, than the second, each with 

 an elongate group of setas on the upper or outer side, and (in the adult male) a brush- 

 like fringe of hairs on the lower or inner; the third joint thinner than the second, 

 two thirds as long, with a few hairs; flagellum nine-jointed; secondary flagellum, little 

 more than half as long as the principal, five-jointed. 



Lower antennce. In tlie adult male first three joints short, gland-cone very inconspicuous, 

 the third joint having a tuft of hairs near the inner distal angle ; the fourth joint longer 

 than the three preceding united, closely fringed on one side with a brush of hairs, which 

 also pass round the distal margin, on the other side carrying numerous unequal spines, 

 eighteen in one row, four in the other, and also some setae; the fifth joint nearly as 

 long as the fourth, carrying twelve setae on one edge, and eight calceoli, each with an 

 accompanying tuft of hairs, on the other ; the flagellum very long and slender, with 

 fifty joints, each of the first six having a calceolus, and of the next forty-two each 

 alternate one, the calceoli being smaller towards the end of the flagellum. In a 

 specimen with no fringe of hairs and no calceoli the fifth joint of the peduncle has a 



