South African Crustacea. 41 



and the dorsal margin of the palrn 40 mm. In bulk this 

 appendage appears nearly to equal all the rest of the animal, 

 which has a length of 140 mm., the carapace including rostrum 

 being 60 mm. The outer rarnus of the uropods is rather longer 

 than the inner. The broad brushes of hairs within the concave 

 finger and thumb of the smaller cheliped are a striking feature. 



Another dried specimen measures 113 mm. in length, with large 

 cheliped 134 mm. long, finger 33 mm. and back of palm 31 mm. ; 

 upper teeth of rostrum 13. From Umgeni lagoon (Natal). Durban 

 Museum. A third specimen, from the Durban Museum and Durban 

 waters, 140 mm. long, with 12 upper teeth on the rostrum, has 

 the large cheliped on the right side, with the finger 38 mm. long, 

 and back of palm only 25 mm. 



GEN. EUPAL^EMON, Ortmann. 



1891. Palcemon (Eupaliemon) (group), Ortmann, Zool. Jahrb., 



vol v., pp. 696, 697. 

 1897. Enpalcemon (sub-gen.), Ortmann, Eevista do Museu Paulista, 



N. 2, p. 196. 

 1905. Palcemon (Eupalamori), Coutiere, Ann. Sci. Nat., Ser. 8, 



vol. xii., pp. 252, 266, 273, 287. 



EUPAL^EMON RUDIS (Heller). 



1862. Palcemon rudis, Heller, Verb. Zool. bot. Gesell. Wien, p. 527. 



1866. Palcemon rudis, Heller, Eeise Novara Crust., p. 114. 



1878. Palcemon Mossambicus, Hilgendorf, Monatsb. Ak. Wiss. Berlin, 



p. 839, pi. 4, fig. 17. 

 1891. Palcemon (Eupalcemon) rudis ('?), Ortmann, Zool. Jahrb., vol. v., 



pp. 699, 716. 

 1891. Palcemon (Macrobrachium) mossambicus, Ortmann, Zool. 



Jahrb., vol. v. p. 741. 

 1905. Palcemon (Eupalcemon) rudis, Coutiere, Ann. Sci. Nat., Ser. 8, 



vol. xii., pp. 273, 288, pi. 12, figs. 23, 24. 



The first of the above references I have not seen, and for the 

 identification of Hilgendorf 's species with the earlier name given 

 by Heller I have been guided by Professor Coutiere's discussion. 

 He gives the following characters as distinctive of E. rudis. In 

 common with other members of the group, sub-genus, or genus, it 

 has the second pair of feet cylindrical, rarely unsyrnmetrical, fifth 

 joint longer than the fourth, palm riot depressed, cylindrical. In 

 common with E. idee (Heller) it has the carapace scabrous, but it has 



