Ampelisca 103 



than the 3'^; the 5*^ produced in front is as long as the 4^^; the 6*^^ is a little 



long-er than the 5^^; the lanceolate 7*^ % length of 6^\ Uropod 3 (Fig. 24) with 



broad foliaceous rami, plumose on the 



confronted margins. Telson (Fig. 24) nearly 



twice as long as broad, cleft ^/g length, 



the distal half triangularly tapering to , /^, \-- Uropod i 



the acute apices, each caiTving a spinule; 



on the surface within the margins are Teisou 



€ or more pairs of setules. The specimens uropod 3 — j- 



in spirit dark coloured, the branchialVesicles 



in particular being port-wine coloured. 



L. about 13 mm. 



Southern Indian Ocean (Cape Agulhas). pj 24 a fusca 



Depth 282 m. Uropod 1—3 and teisou. 



7. A. odontoplax 0. Sars 1879 A. 0., G. 0. Sars in: Arch. Naturv. Kristian., 

 vA p.454 1 1885 A. 0., G. O. Sars in: Norske Nordhavs-Exp., r. 6 Crust. I p. 196 t. 16 

 f. 4 I 1891 A. 0., G. 0. Sars, Crust. Norway, V. 1 p. 176 t. 61 f. 2 [ 1893 A. 0., A. Della 

 Valle in: F. Fl. Xeapel, v. 20 p. 485. 



Head carinate dorsally. Side-plates 1 — 3 with distinct tooth at lower 

 bind Corner, 4^^ with bind and lower margins in a continuous curve. Pleon 

 Segments 1 — 4 with carina, that of 4^^ ending angularly, postero-lateral 

 angles of 3^ segment slightly produced and acute. Eyes none. Antenna 1 in 

 5 about half length of body, rather more than half of antenna 2, 2^ Joint of 

 peduncle twice length of 1®\ flagellum with 32 joiuts, scarcely twice length of 

 peduncle. Antenna 2, ultimate Joint of peduncle shorterthan penultimate. Gnatho- 

 pod 1, 6*'^ Joint a little shorter than ^^^. Peraeopods 1 and 2, 7**> Joint cousiderably 

 longer than 5*"^ and 6^'* combined. Peraeopod 5, 2^ Joint broad, scarcely as 

 long as rest of leg, expansion nearly trausversely truncate, reaching a little 

 below the short 3*^ Joint, 6*^ longer than 4*^' and 5^^ combined, 7**^ more 

 than half length of 6**^, narrowly lanceolate. Uropod 2 with rami veiy 

 spinöse on inner margin, and carrying a long terminal spine; uropod 3, rami 

 lanceolate, fringed with setae and spines. Telson oblong oval, with 2 pairs 

 of dorsal spinules and a spinule in the emargination of each apex. Whitish, 

 pellucid, with no distinct pigmentation. L. o 18 mm. 



North-Atlantic and Arctic Ocean (Trondhjemsfjord, Helgeland, West-Finmark). 

 Depth 267 ra. 



8. A. uncinata Chevreux 1887 A. u., Chevreux in: Bull. Soc. zool. France, 

 v.\2 p. 573 I 1893 A. brevicornis (part.), A. Della Valle in: F. Fl. Neapel, u 20 p. 473. 



Resembling A. gibba and A. brevicornis (p. 101, 100). Head obliquely 

 truncate. Side-plates 1 — 3 with small tooth at lower bind corner. Pleon segment 3, 

 postero-lateral angles acute and recurved, segmenf 4 with high compressed 

 carina, ending angularly, following Segments slightly carinate. Eyes none. 

 Antenna l not reaching end of penultimate Joint of peduncle of antenna 2, 

 2*^ Joint ^3 louger than 1^^ flagellum ]0-jointed. Antenna 2 a little longer 

 than the body, peduncle % of whole length, ultimate Joint of peduncle a little 

 shorter than penultimate. Peraeopods 1 and 2, 7^^ Joint longer than 5**^ and 6*'^ 

 combined. Peraeopod 5, 2*^ Joint reaching nearly to middle of 4*''; the 4^^ with 

 curved and angular lobe descending below the 5^^^; the 6*^1 broad and oval; the 

 7*^^' nearly as long as the 6*^\ very strongly curved in form of a hook at its 

 extremity. Uropod 3, rami lanceolate, dilated at the base, almost entirely smooth. 



