1008 ME. L. A. BOBEADAILE ON CBTISTACEANS [DeC. 13, 



(2 on the carapace) aud 3 below ; the carapace with hepatic and 

 antennal spines ; tlie first antenna having the first joint of its 

 peduncle as long as the second and third joints together, and its 

 fiagella subequal and not so long as the second pair of legs ; the 

 second antenna M'ith the peduncle shorter than the first joint of that 

 of the second, the flagellum longer than the bod}% and the scale 

 longer than the anteuuular peduncle; the third maxilliped reaching 

 the end of the second joint of the antemiular peduncle ; the first pair 

 of legs outreaching the rostrum by the wrist and hand; the legs of 

 the secojid pair unequal, the right larger and outreaching the first 

 pair by nearly the whole of the hand, bearing a spine below at the 

 free end of the merus and one above at the free end of the wrist, 

 with the fingers barely half tlie length of the palm ; the legs of 

 the last three pairs subequal, reaching beyond the end of the 

 rostrum ; and the endopodite and esopodite of the uropods equal, 

 and longer than the telson, which ends in six spines, the outer- 

 most pair being the smallest and the intermediate the longest." 



The length of the single specimen is 21 mm. from the end of 

 the telson to the tip of the rostrum. 



The animal when alive was colourless and almost transparent. 



The species differs from P. tenuipes Dana in the following 

 points :— 



(1) There are three teeth on the underside of the rostrum, 



instead of two. 



(2) The inner edges of the fingers of the second pair of chelas 



are armed with teeth. 



(3) The distal end of the merus is rounded in profile, but pro- 



vided mth a large spine below at a short distance from 

 the end. In P. tenuipes it is acute in profile aud without 

 the tooth. 



(4) The arrangement of teeth on the inner ramus of the mandible 



is different in the two species (fig. Sd). 

 One specimen from Funafuti. 



Genus Pal^mon- Fabricius, 1798. 

 12. PALa:MON LAB, Tabricius, 1798. 



Palcemon lur, Fabricius, Entom. Sy&t., Suppl. p. 402 (1798); 

 Ortmann, Zool. Jahrb. v. Syst. 5, p. 724 (1891) ; de Man, Max 

 Weber's Zool. Ergebn. ii. p. 445 (1892). 



Palcenion ornatus, Oh\der, Encycl. viii. p. 660 ; H. M. -Edwards, 

 H. N. Crust, ii. p. 396 (1837). 



Bithynis lar, Bate, ' Challenger ' Macrura, p. 789, pi. cxxix. 

 fig. 1 (1888). 



As de Man (loe. cit.) points out, the end of the telson is fre- 

 quently woru or broken off in this species, so that the separation 

 from ifc of forms with this structure truncated is unreliable. 



Mr. Gardiner states that this species is very common in the 

 upper w aters of all the rivers of Fiji. In Taviuni it was formerly 

 reserved as food for chiefs. 



Eight males from Tamavua Eiver, Viti Leva, Fiji. 



