KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 22. N:0 7. 19 



a little longer than the metacarpus; the metacarpus is serrated. The carpus of the second 

 pair is longer than the metacarpus, produced, serrated. The metacarpi of the fifth and 

 sixth pairs are much longer than the carpi. The seventh pair are a little longer than 

 the femur of the sixth pair; the femur of the seventh pair is twice longer than all the 

 following joints together. The lateral parts of the pleonal segments are rounded, serrated. 

 The second and third ural segments are coalesced. The peduncle of the first pair of 

 uropoda is subequal in length to the rami; the peduncle of the second pair is shorter 

 than the rami; the peduncle of the last pair is much, but not twice, longer than the rami. 

 The telson is broader than long, triangularly rounded, equalling a fourth of the length of 

 the peduncle of the last pair of uropoda. 



Colour. »Colourless». 



Length. About 6 mm. 



Hab. The South Atlantic, surface; Lat. 37° 47' S., Long. 30° 20' W. March 9, 1876, the Challenger- 

 Exp. One specimen. 



Syn. 1888. Cyllopus Hookeri. TH. STEBBING. -Report on the Amphipoda collected by H. M. S. Challenger, 



during the years 1873—1876". The voyage of H. M. S. 

 Challenger. Zoology Vol. 29, p. 1296, pi. 209. 



For a fuller knowledge of the species I refer to the exhaustive description given by 

 Stebbing 1. c, here I mention only that Cyllopus Hookeri seems to be a well defined 

 species distinguished from Cyllopus magellanicus, Dana, C. armatus and C. levis by having 

 the second and third ural segments coalesced, from Cyllopus Batei by the comparatively 

 short peduncle of the last pair of uropoda and by the serration of the metacarpus of the 

 second pair of peraeopoda. There are also many other special characteristics. 



Genus 2. C Y L L I A S, C. BOVALLIUS, 1887. 



Derivatio: KvXXiag a Greek name. 



Diagn. Caput fere cubicum, tumidum. Oculi grandes, totum fere caput occupantes. Pedes percei 

 primi paris carpo dilatato. Pedes secundi paris carpo cyliudrato, non producto, metacarpo 

 duo processus terminales prrebente. Femur pedum septimi paris articulis sequentibus bre- 

 vius (?). Telson lanceolatum. 



The head is almost cubical, tumid. The eyes are large, occupying almost the whole head. 

 The first pair of perceopoda with dilated carpus. The second pair with the carpus cylindrical, 

 not produced, and the metacarpus provided with two apical processes. The femur of the 

 seventh pair is shorter than the following joints together (?). The telson is lanceolate. 



Syn. 1887. Cyllias, C. Bovallius. -Systematical list of the Amphipoda Hyperiidea». Bill. t. K. Sv. Vet. Ak. 



Handl. Bd. 11. N:o 16, p. 12. 



The ranging in of the type of de genus, Hyperia tricuspidata, Streets, among 

 the Hyperids is difficult, because the original description is very meagre. The reasons 



