CYCLOPOIDEA. 1051 



elongato (forsan duplice) ; setis apicalibus posticis articulum* fere 



cequantibus, a7iticis apice remotis, posticd penultimd articidi longitu- 



dine, anticd penultimd et antepenultimis vninutis. Styli caudales 

 breves; setis strictis, rectis, diiobus paido longioribus. 



Front rounded. Cephalothorax four-jointed ? obtuse behind. Ante- 

 rior antennae very slender, a little longer than cephalothorax, about 

 twenty-four-jointed, doubly curved and apex behind line of beak, 

 short setigerous, last joint elongate (perhaps double) ; posterior 

 apical setae nearly as long as joint, anterior remote from apex, pos- 

 terior penult as long as penult joint, anterior penult and both ante- 

 penult obsolescent. Caudal stylets very short; setae straight, not 

 spreading, two a little longer than the others. 



Plate 72, fig. 2 a, animal, enlarged ; b, extremity of anterior an- 

 tennae ; c, abdomen, in profile. 



Latitude 40° north, longitude 157° west, July 2, 1841; also, lati- 

 tude 45° north, longitude 156° west, July 6, 1841 ; also, in latitude 

 27i° south, longitude 136° west, August 13, 1839. 



Length, one-fifteenth to one-twelfth of an inch. The body has the 

 usual proportions. The caudal setae are peculiar in not being diver- 

 gent, and the stylets are scarcely longer than broad, not exceeding, or 

 scarcely so, the last segment of the abdomen. The setae of the anterior 

 antennae towards the base are scarcely longer than the diameter of 

 the antenna. The last joint of this organ has the same appearance of 

 an oblique articulation under the apex of the preceding, as in the G. 

 rotundatus. The anterior setae of the apical joint are distinct but 

 very short. Setae of the following organs rather short. 



Colour, a little purplish or reddish. A bag of eggs was attached to 

 one individual, from latitude 45° north. It was a little torn, and con- 

 tained ten eggs. In the specimens obtained in August of 1839, the 

 abdomen appeared to be five- instead of four-jointed, there being a 

 faint articulation across near its base, subdividing what is properly 

 the first joint in the specimens obtained in latitude 45° north. The 

 second joint in the former was the largest, and a little gibbous below. 



* By this expression we mean, in this and other cases, the particular joint which bears 

 the setae alluded to. 



