8 CARL BOVALLIUS, AMPHIPODA HYPEPJIDEA. I. 2. CYLLOPODIDJ5. 



The description and drawings given by Spence Bate (1. c.) are too imperfect to 

 allow of a certain judgement about the identity of the species. Possibly it may prove 

 to- be an elder male form of the original Cyllopus magellanicus, Dana, but as far as the 

 characteristics hitherto are known (from the description of Spence Bate) it differs from 

 that species by the obtuse first pair of antennae, the very long metacarpi of the fifth and 

 sixth pairs of pereiopoda, the comparatively short femur of the seventh pair, the long- 

 peduncles of the uropoda and by the larger telsori. 



From the original description the following points may be added. 



The flagellum of the first pair of antenna terminates in a minute articulus. 



The second pair of antenna?, terminate with one long and two short articuli. 



The metacarpus of the second pair of pereiopoda is minutely serrated along the 

 posterior margin; the dactylus is scarcely serrated. 



The third and fourth pairs are uniform having the carpus unarmed; the meta- 

 carpus slightly serrated upon the posterior margin toward the distal extremity. 



3. CYLLOPUS LEVIS, C. BOVALLIUS, 1887. 



PI. I, fig. 3G— 41. 



Diagn. Caput non productum, segmentis tribus primis pereii brevius. Antenna' primi paris abrupte 

 angustatae, apice cvlindrato. Segraentum septimum pereii brevissimum, cetera subaequalia. 

 Epimera quattuor prima sequentibus non altiora. Carpus primi paris pedum pereii non 

 productus, longitudine metacarpum aequans. Carpus pedum secundi paris paullo productus, 

 metacarpo brevior. Metacarpi pedum quinti ac sexti parium carpi s paullo longiores. Pedes 

 septimi paris femore pedum sexti paris longiores; femur, post rectum, articulis sequentibus 

 ter fere lbngius. Latera segmentOrum duorum priorum plei post angulata, latera 

 seonienti ultimi rotundata. Segnientum secundum ac tertium uri libera non coalita. Pe- 

 dunculus pedum uri primi paris ramis paullo brevior; pedunculus pedum secundi paris 

 ramis plus quam dimidio brevior, ramus interior ovatus; pedunculus pedum ultimi paris 

 ramis duplo longior. Telson semicirculatum, segmento ultimo uri brevius, quiutam partem 

 longitudinis pedunculi pedum uri ultimi paris baud a>quans. 



The head is not produced, shorter than the first three pereional segments. The first pair of 

 antenna with the flagellum suddenly narrowed, the terminal part cylindrical. The seventh 

 pereional segment is the shortest, the preceding are subequal. The first four pairs of 

 epimerals are not deeper than the following. The carpus of the first pair of pereiopoda 

 is not produced, as long as the metacarpus. The carpus of the second pair is a little 

 produced, shorter than the metacarpus. The metacarpi of the fifth and sixth pairs are' a 

 little longer than the carpi. The seventh pair are longer than the femur of the sixth 

 pair; the femur of the seventh pair is almost three times longer than all the following 

 joints together, the posterior margin is straight. The lateral parts of the first two pleonal 

 segments with the posterior corners rectangular, that of the third segment rounded. The 

 second and third ural segments are free, not coalesced. The peduncle of the first pair 



