142 Records of the Indian Museum. [Vol. XXIV, 



1900. Urocaris longicaudata, Rathbun, Proc. Washington Acad. Sci. 

 II, p. 155. 



1902. Urocaris longicaudata, Rathbun, Bull. U. S. Fish Comm. XX, ii, 

 p. 126. 



1918. Urocaris longicaudata, Hay and Slicre, Bull. U.S. Bur. Fisher- 

 ies XXXV, p. 394. 



This species, which is the type of Stimpson's genus Urocaris, 

 inhabits the West Indies and the adjacent coasts of America 

 as far south as Brazil. The specimens I have examined are from 

 Punta Rassa in Florida. 



The anterior margin of the carapace, immediately below 

 the orbit, projects in the form of a long strap-shaped process 

 with rounded apex. This projection is homologous with the less 

 prominent infra-orbital lobe found in many related species and is 

 imperfectly described by Miss Rathbun (loc. cit., 1902) as a 'rounded 

 extra-orbital tooth.' The antennal spine which usually arises 

 from the vicinity of the lower limit of the infra-orbital lobe is 

 completely absent in P. longicaudatus, though it appears to be 

 present in all other known representatives of the subgenus Peri- 

 climenel. 



Periclimenes aesopius (Spence Bate). 



1864. Anchistia aesopia, Spence Bate, Proc. Zool. Soc. London, 1863, 



p. 502, pi. xli, fig. 5. 

 1917. Urocaris aesopius, Borradaile, Trans. Linn. Soc. (2) Zool. XVII, 



P- 354- 



Through the kindness of the authorities of the British Museum 

 I have been able to examine the types of this remarkable species 

 which has apparently not been rediscovered during the past fifty 

 years. There are two specimens, one complete and one which has 

 been dissected and is in a fragmentary condition. 



The rostrum is slender and straight, with the ventral portion 

 below the midrib greatly reduced. On the upper margin there are 

 9 or ir teeth, the three hindmost placed on the carapace behind 

 the orbit. On the lower margin there are two small teeth near 

 the apex and behind these teeth a fringe of very long plumose 

 setae. 



The carapace is prominently angled below the orbit. There 

 are antennal and hepatic spines, the latter on a lower level than 

 the former. 1 The eyes are slender, with stalk fully twice the length 

 of the cornea. The lateral process of the antennule is short, 

 not reaching the middle of the basal peduncular segment. The 

 anterior margin of this segment external to the insertion of the 

 second segment is greatly produced, as shown in Bate's figure, 

 reaching the end of the second segment and extending far beyond 

 the spine that terminates the outer margin. The antennal scale 

 is unusually broad distally ; it is about two and a half times as 

 long as wide, with the terminal spine not reaching the end of the 

 lamella. 



The position given to these spines in Spence Bate's figure is erroneous. 



