354 PERCY SLADEN TRUST EXPEDITION 



h. Five teeth of dorsal crest stand behind orbit. Walking legs have simple 

 dactylopodites. 



U. CBSopius (Bate), 1864. 



2. Rostrum straight. Third abdominal segment does not project behind. 



a. Rostral formula ^. Second leg of great length. 



U. longipes Stimpson, 1860. 



b. Rostral formula i^-ii. Second leg rather short. 



U. korni (Lo Bianco), 1903. 



1. (Type.) Urocaris longicaudata Stimpson, 1860. 



Proc. Ac. Philadelphia, 1860, p. 39. Kingsley, Bull. Essex Inst. x. p. 65; Proc. 

 Ac. Philadelphia, 1878, p. 330. Rathbun, Bull. IT. S. Fish Coram, xx. ii. p. 126 (1901). 

 1 Pearson, Rep. Ceylon Pearl Fisheries, iv. p. 78, PI. 1, fig. 5 (1905). 



Specimens in the present collection of a Urocaris resembling this species do not agree 

 with the descriptions given by the authorities cited, in the following points : (1) the 

 rostrum outreaches the second joint of the antennular peduncle, (2) the flagella of the 

 antennule are much longer than its stalk, (3) the first leg outreaches the antennal scale 

 by the fingers, and the fingers and palm are subequal, (4) the fingers of the second 

 leg are rather shorter than the palm. Further investigation of the reported occurrence 

 of U. longicaudata in the Indian Ocean is desirable. 



Carolina to Brazil. Western Indian Ocean 1 



2. Urocaris longipes Stimpson, 1860. 



Proc. Ac. Philadelphia, 1860, p. 39. 

 Ousima I., 20 fms. 



3. Urocaris CBSopius (Bate), 1864. 



Anchistia msopia Bate, Proc. Zool. Soc. Lond., 1863, p. 502, PL 41, fig. 5 (1864). 

 St Vincent Gulf. 



4. Urocaris infraspinis Rathbun, 1902. 



Proc. U. S. Mus. xxiv. p. 903 ; Decap. Crust. N.W. America, p. 31 (1904). 

 California to Mexico. 



5. Urocaris psamathe de Man, 1902 (Plate 53, fig. 3). 



Abb. Senckenb. Ges. xxv. p. 816, PI. 25, fig. 51. 

 Ternate. 



6. Urocaris korni (Lo Bianco), 1903. 



Anchistia Kornii, Lo Bianco, Mitt. Stat. Neapel, xvi. p. 250, PL 7, fig. 13 (1903). 

 Periclimenes Korni'? Kemp, Journ. Mar. BioL Assoc. (N. S.) viii. p. 411 (1910). 

 Mediterranean. Bay of Biscay ? Bathypelagic, 400 — -600 fms. 



