GAMMA RIDE A. 915 



Rio Janeiro, about the sand-beach near the Sugar Loaf. 



Length about one-fourth of an inch. Colour a tinge of green. The 

 head is scarcely longer than the first thoracic segment. The inferior 

 antennae have the flagellum more than three times the length of the 

 base. The anterior feet are minutely hairy on the lower side, and the 

 others somewhat less so. Caudal stylets of first pair are longest ; 

 second pair next longest 5 of third pair shortest, and not extending as 

 far back as preceding. The branchial appendages of the third and 

 fifth pairs are represented in figures d and e. No branchiae were 

 observed on the first, second, or seventh pairs ; but there may be some 

 doubt as to the absence from the second. 



This species is peculiar in its concealing the flagella of the inferior 

 antennas beneath the epimerals ; and as this character has not been 

 mentioned of other species, it may be distinct in genus. No specimens 

 are in our collections, and the author can cite for description only the 

 notes and figures made by him when the specimens were collected. 

 It is possible that the four anterior legs have very imperfect hands, 

 and the species, on this account, may be nearer Anonyx than Lysia- 

 nassa. 



L. brasiliensis, Dana, Proc. Amer. Acad. Sci. Boston, ii. 208. 



Ltsianassa nasuta. 



Corpus valde compressum, epimeris pergrandibus. Ocidi reniformes. 

 Antennas lmce breves, 2dis longiores, flagello ferrne 7-articidato, ap- 

 pendice §-A-articidat&. Pedes antici, ungne triplo bremore quam 

 articidus 5tns, articulo 5to oblongo, apice angustiore, setis dimidio 

 articuli non longioribus. Pedes 2di articxdo bto spatidato apice 

 rotundato, ungue terminali fere obsolete, articulo 4:to fere duplo lorir 

 giore quam btus. Pedes 4 proximi infra setosi, setis longiusculis ; 6 

 postici sensim increscentes, articulo 5to paris 7 mi gracili, setis semilati- 

 tudine hujus articuli non longioribus. 



Body much compressed, epimerals very large. Eyes reniform. Supe- 

 rior antennae short, longer than the inferior, flagellum about seven- 

 jointed, appendage three or four-jointed. Anterior feet with a small 



