420 PROCEEDINGS OF THE ACADEMY OF [1879. 



biflagellate, the peduncle with a spine externally on the basal 

 joint; antennal scale shorter than antennal peduncle; mandible 

 with a two-jointed palpus; external maxilliped long, with a slen- 

 der cxognath ; pereiopoda without epipodites ; carpus of the 

 second pair triarticulate. Type Ogyris orientalis Stm. 



Ogyris alphaerostris, sp. n. (Plate xiv. fig. 7.) Carapax smooth, 

 without dorsal carina; rostrum very small, triangular, remind- 

 ing one of that of Alpheus. Eyes resembling those of Hippa, 

 elongate, slender, half as long as the carapax, and extending 

 slightly beyond the antennal peduncles, the cornea but slightly 

 larger than the ocular peduncle. Antennula? with a spine on the 

 outer surface of the basal joint; biflagellate, flagella equal, and 

 about as long as the peduncle. Antennae with the basal scale 

 narrow, lanceolate, reaching nearly to the tip of the penult joint of 

 the peduncle; flagella three times as long as the peduncle, or one 

 and one-half times the length of the carapax. External mallipeds 

 long, stout, the distal joint being very small, and furnished with 

 long hairs, exopodite slender. First pair of pereiopoda slender, 

 chelate; meros, carpus, and hand nearly equal, fingers slightly 

 longer than the palm. Second pair very long, slender, chelate ; 

 carpus triarticulate, hand similar to that of first pair. Third and 

 fourth pairs subequal, slender; the dactyli slender and narrow, 

 being not over one-third the width of the preceding joints. Fifth 

 pair very slender, more so than any of the preceding with the 

 ischium longer than the meros, which in turn is about as long as 

 the three last joints; carpus, propodus, and dactylus subequal. 

 The three last pairs of pereiopoda have long hairs on the distal 

 joints. Abdomen smooth, rounded above; telson short, with the 

 sides arcuate, and the tip rounded. 



Union College, No. 407, Northampton Co., Va., Eastern shore, 

 Atlantic side. H. E. Webster. 



Length 19.5 mm. 



Having but a single specimen, and that in poor condition, I 

 have not been able to study it as thoroughly as I could wish. It 

 agrees, as far as I have been able to examine it, with Stimpson's 

 diagnosis of the genus except in the following particulars. The 

 carapax is not cristate, and has a minute rostrum; the antennal 

 flagella are much longer than in the type species ; the mandibles, 

 as the specimen is unique, I have not been able to examine. It is 

 the second species of the genus known, and is interesting on ac- 



