403 



cephalon and the dorsally produced segments of urosome. Moreover the 

 mutual longitudinal relation of the 2 pairs of antennae, and the structure of 

 the gnathopoda will serve for recognizing this genus. It comprises 3 Nor- 

 wegian species, (to be described in the sequel), one of which is now for the 

 first time established. The Rev. Mr. Stebbing has also described another 

 species from the Challenger Expedition as P. Mar low's. 



1. Pardalisca cuspidata, Kroyer. 



(PI. 141, PL 142, fig. 1). 

 Pardalisca cmpidata, Kroyer, Nat. Tidsskr. 1 R. Bd. 4, p. 163. 



Body moderately slender, cylindric, smooth, with the back broadly 

 rounded. Last segment of metasome having the posterior edge produced on 

 each side of the dorsal face to a triangular, flattened lobe. First segment 

 of urosome with 2 juxtaposed dorsal projections, 2nd segments with a single 

 mediane one. Cephalon about the length of the first 2 segments of mesosome 

 combined, rostral projection very small, anterior edge passing into the inferior 

 in a perfectly even curve. The anterior pairs of coxal plates about half as deep 

 as the body, and rounded quadrangular in form; 5th pair with the anterior 

 lobe broadly rounded, and twice as deep as the posterior. Last pair of 

 epimeral plates of metasome but slightly produced at the lateral corners. 

 Eyes very narrow, slightly sigmoid in form, and nearly occupying the whole 

 height of the front part of the cephalon, pigment bright red. Superior 

 antennae in female considerably exceeding Vs of the length of the body, 1st 

 joint of the peduncle about the length of the other 2 combined, flagellum 

 more than o times as long as the peduncle, and composed of numerous short 

 articulations, accessory appendage about half the length of the peduncle and 

 5-articulate, with the 1st articulation nearly as long as the other 4 combined. 

 Inferior antennae exceeding the superior by about 1 A of their length, the 2 

 outer joints of the peduncle rather elongated and narrow, and nearly equal- 

 sized, flagellum somewhat longer than the peduncle. Both pairs of antennae 

 in male comparatively longer than in female, the superior ones having the 

 1st joint of the flagellum very large and clothed with fine sensory bristles 

 arranged in several transverse rows, accessory appendage much larger than in 

 female, and having its 1st articulation somewhat laminar, and more than 

 twice as long as the other 4 combined. Anterior gnathopoda rather small, 

 though not very slender, carpus considerably dilated in the middle, subfusi- 

 form, and densely setous inferiorly, propodos much narrower and scarcely half 

 as long, dactylus forming a broadly oval, scale-like lamella, armed at the 



