14 REV. T. E. R. STEBBING- ON THE 



1884. Urothoe elegans, Chevreux, Assoc, pour I'av. des Sciences, Congres de Blois, Ampli. du 



Croisic, p. 2 (sep. copy). 

 Ig87. ,^ „ Chevreux, Crust. Amph. Bretagne, Bull. Soc. Zool. de France, t. sii. extr. 



p. 11. 

 1888. ;, „ Chevreux, Amph. du litt. des A9ores, p. 5. 



Eostral point obtuse, very slightly produced. Postero-lateral angles of the first 

 pleon-segment having a minutely produced point, those of the second more sharply 

 produced, those of the third slightly rounded. 



Eyes moderately large in the adult male. 



Upper antennce. Peduncle as in Urothoe marinus; flagellum six-jointed; secondary 

 flagellum slender, three-jointed, decidedly less than half as long as the principal. 



Lower antennae. In the adult male peduncle very nearly as in Urothoe marinus, the 

 fourth joint, however, having sixteen or eighteen spines in one row, and two or three 

 in the other, the fifth joint cawying a row of nine calceoli on one edge, and four or 

 five rather small setfe on the other ; the flagellum between two and three times as long 

 as the peduncle, consisting of forty joints. In one specimen on one antenna each of 

 the first five joints, on the other each of the first three had a calceolus, the remaining 

 joints being alternately without and with these appendages. In the female the fourth 

 joint longer than the fifth, carrying fourteen spines in one row and two in the other, 

 with a few setae, the fifth joint having six spines and four of the long setae; the 

 flagellum full as long as the fifth joint of the peduncle, with one spine and four setae 

 on the first joint, the slender second joint being half as long as the first, the two setae 

 at its tip not very elongate. 



Mandibles. Cutting-plate like a broad tooth; the little secondary plate on the left 

 mandible (when unworn) cut into five little unequal teeth, on the right strap- 

 shaped; the third joint of the palp longer than the second, with five setae in a series 

 beginning low down on the front margin, and two accompanied by two spines at 

 the apex. 



Lower lip. Mandibular processes well developed. 



First maxillce. Inner plate slender, curved, with two plumose setae on the rounded 

 apex; outer plate as in Urothoe fulchella; second joint of the palp about equal in 

 length and thickness to the first, fully reaching the apex of the outer plate, having 

 three setae on its distal margin. 



Second maxillw as in Urothoe imlchella, but with the plumose setae not fringing all 

 the distal half of the inner margin of the inner plate. 



Maxillipeds diff"ering but little from those of Urothoe pulchella ; the outer plate with 

 five spines ; the second and third joints of the palp not so much distally widened. 



First gnathopods. Side-plates distally widened, with two spinules at the lower hind 

 corner. The wrist with seven or eight spines in the row on the very sloping distal 

 margin ; the hand narrowly oval. 



