149 



different parts of the Oceans. I have been enabled to distinguish off the Nor- 

 wegian coast rather a large number of species, to be described in the following 

 pages. They all exhibit a very uniform external appearance, and of course are 

 not easy to distinguish when preserved, though in the living state they may in 

 most cases be at once recognized by differences in the colouring of the body. 



93. Amphiascus cinctus (Clans). 



(PI. XCI & XCII). 

 Dactylopus cinctus, Glaus, Die Copepodenfauna von Niz/a, p. 27, PI. Ill, figs. 8 IL J . 



Specific Characters. Female. Body moderately slender, with the anterior 

 division but little broader than the posterior. Cephalic segment about the length 

 of the 4 succeeding segments combined, epimeral parts not very deep, and evenlv 

 rounded in front. Rostrum strongly prominent, lanceolate and slightly curved at 

 the tip. Epimeral plates of the 3 succeeding segments of moderate size and 

 slightly angular behind. Last segment of rnetasome scarcely narrower than the 

 preceding one. Urosome about 2 /a as long as the anterior division, and tapering 

 only very slightly behind, genital segment equalling in length the 2 succeeding 

 ones combined, anal segment somewhat shorter than the preceding one. Caudal 

 rami quadrangular in form, broader than they are long, the 2 middle apical setae 

 rather strong, spine of outer corner shorter than the corresponding ramus. An- 

 terior antennse moderately slender and densely setiferous, 8-articulate, the first 

 2 joints much larger than the others, 3rd and 4th of about equal size, terminal 

 part about, half the length of the proximal. Posterior antennse rather strongly built, 

 outer ramus with the middle joint well defined, setiferous. 1st pair of legs with 

 the outer ramus about half the length of the inner, middle joint much the largest, 

 terminal joint small, lamelliform and armed with 4 claw-like spines, inside which 

 a slender seta is attached; inner ramus with the 2 outer joints short, the laM 

 one armed on the tip with 2 very strong claws, the inner one the longer. Nata- 

 tory legs moderately slender and of normal structure. Last pair of legs very 

 large and foliaceous, distal joint of considerable size, rounded quadrangular in 

 form, and provided with 6 marginal seta3, the outermost one the shortest and 

 attached at rather a long distance from the base; inner expansion of proximal 

 joint triangular, scarcely extending ! ^voncl the middle of the distal joint, and 

 carrying 5 setse, the outermost one much the shortest. Ovisacs of moderate "size, 

 oblong pyriform in shape. 



20 Crustacea . 



