ISOPODA OF THE ' LIGHTNING ' AND OTHEE EXPEDITIONS. 125 



The telson (in. el) is ovate, but very obtusely angled at its termination. Uropods 

 having the outer branches arching but not nearly meeting over the telson, transversely 

 lanceolate, curved; inner branches longer than telson, their second joint broader than 

 long ; the margins of telson and both branches of uropods are not serrulated, but fringed 

 with feathered cilia. 



Eyes minute, black. 



Antennae : upper (ill. a.s) having first joint of peduncle very broad, second as long as 

 the first, but much narrower, having long setae on the outer margin ; third two thirds as 

 long as the second ; flagellum minute, about half the length of the last joint of the 

 peduncle, and consisting of four very minute articulations. Lower antennae (in. a.i) 

 with a broad and thick peduncle and a rudimentary flagellum ; the second joint of 

 peduncle not markedly widened at the extremity ; the three following joints thick, 

 subequal, but the last rather the longest ; flagellum not half the length of the last 

 joint of peduncle. 



First gnathopods (in. gn 1 ) strongly formed; two upper joints very massive, the first 

 broader than long ; meros of the usual cup-shaped form characteristic of the family ; 

 carpus minute, triangular, with the distal margin produced into a setose lobe ; hand 

 pyriform, the palm bearing a tubercular process near the middle; finger simple. The 

 margin of the wrist and palm of the hand are setose. 



Second gnathopods very setose ; carpus small, and narrower (as usual) than meros, 

 but produced below into a rounded lobe ; hand broad, much curved ; palm finely 

 crenated, and carrying a distal spine, which, when seen under a high power, is found to 

 have its further margin beautifully pectinated ; finger strong, as long as palm (on 

 which, however, it does not seem capable of closing), unguiculate; the unguiculus 

 minute, surrounded at its base with a tuft of hair. 



Last perseopods setose ; carpus very short ; propodos equal in length to two pre- 

 ceding joints, and twice as long as broad, front margin minutely crenulated and 

 furnished with a distal spine ; finger strong, round, about two thirds as long as 

 propodos, furnished with a minute unguiculus, which is surrounded with a tuft of 

 hairs. 



Length 20 millim. 



Habitat. On the coasts of New Jersey, Connecticut, and Massachusetts (Harger and 

 Verrill) ; Greenland (Kroyer) ; Denmark (ScModte and Meinert). 



Our description is drawn up from specimens kindly sent to us, named Anthura 

 brunnea, by Mr. S. I. Smith, the talented carcinologist of Yale College. There can be 

 no doubt, we think, that it is the A. carinata of Kroyer. Harger calls attention to 

 certain points in which the description of Kroyer does not seem to agree with the 

 American specimens ; but if the figures of the parts so described which are given in 

 the ' Voyage en Scandinavie ' &c. be examined, the apparent discrepancies seem to 

 disappear. 



vol. xn. — paet iv. No. 7. — October, 188G. u 



