920 CRUSTACEA. 



maxilla of first pair ; m 2 , ibid, of second pair ; m 5 , maxillipeds ; n 9 o, 

 parts below base of maxillipeds ; t, lamellar processes of maxillipeds) ; 

 h, same view, with the maxillipeds bent downward, out of place ; 

 i, process at base of inferior antennas ; k, part of flagellum of same ; 

 I, superior antennas ; I', longer flagellum of same, from another specimen ; 

 rn, part of leg of first pair; % ibid, of fourth pair; o, ibid, of fifth pair; 

 p, caudal segment. 



Good Success Bay, Tierra del Fuego ; collected in eight or ten feet 

 water, being brought up on meat set as bait by Lieutenant Underwood. 



Length, one-third to half an inch. Body very much compressed. 

 Thoracic segments subequal. Third abdominal segment with the pos- 

 terior apex rounded and prominent in a profile view ; the last abdo- 

 minal oblong and emarginate, and either side of the emargination it is 

 acute, or bears a very minute spine. 



The specimens had been put in alcohol before seen by the author 

 and the natural colour could not be ascertained. Nearly all had a 

 transverse band of bright red along the posterior margin of the thoracic 

 and abdominal segments. The other characters of the specimens will 

 be gathered from the figures, and the descriptions of them above. 



Stenia magellanica, Dana, Proc. Amer. Acad. Sci., ii., 209. The genus Stenia 

 is not sustained, on further examination of specimens. Moreover, as Edwards has named 

 a Lysianassa, L. magellanica, (Ann. Sci. Nat. [3], ix, 398, 1848), we change the specific 

 name to the more appropriate one of fuegiensis. 



Gen cs TJBOTHOE, Dana. 



Epimerce permagnce, 5tis parvulis. Pedes 4 antici suhchelati. Antennas 

 lmce hreviores, appendiculatce ; 2dce longce. Maxillipedes longi et 

 angusti, lamellis internis perparvis. Styli caudales postici biroumei, 

 prcelongi, ramis foliaceis, ciliatis. 



Epimerals very large, fifth quite small. Feet of two anterior pairs 

 subchelate. Superior antennae shorter than inferior, appendiculate; 

 inferior pair long. Maxillipeds narrow and long, with the inner 

 lamellae quite small. Caudal stylets of last pair two-branched, very 

 long, branches foliaceous, ciliate. 



