292 



ZOOLOGY OF THE FAR EAST. 



Caridina weberi, de Man. 

 subsp. sumatrensis, de Man. 



1892. Caridina weberi var. sumafrensis, de Man, in Weber's Zool. Ergebn. Raise Nied. Ost- 



Ind., II, p. 375, pi. xxii, fig. 23 g. 

 1905. Caridina weberi var, sumatrensis, Bouvier, Bull. sci. France Belgique, XXXIX, 

 PP- 75, 83- 



The principal characters of the specimens that I refer to this subspecies are 

 as follows : — 



The rostrum reaches nearly to, or a little beyond the end of the second segment 

 of the antennular peduncle and is armed above with from 12 to 21 (usually 15 to 

 19)' teeth of which from 4 to 6 (usually 4 or 5) are situated on the carapace behind the 

 orbital notch. The lower margin bears from 2 to 9 teeth (usually 3 to 6). 



The lateral process of the antennular peduncle does not nearly reach the end of 

 the basal segment. The longitudinal carina on the dorsal surface of the antennulary 

 somite is high. The antero-inferior angle of the carapace is rounded. 



The carpus of the first peraeopods is deeply excavate anteriorly and is from i "8 to as 

 2-0 times as long as its greatest breadth. In the second pair the carpus is very slender, 

 67 or 6-8 times as long as broad. The propodus of the third peraeopods is from 4-3 to 

 47 times the length of the dactylus, the latter segment bearing 7 spines. In the fifth 

 legs the propodus is 5-2 times as long as the dactylus (4-5 times in a very large indivi- 

 dual) ; the spinules on the dactylus vary in number from 36 to 57. The outer uropods 

 bear 18 or 19 movable spines. 



Fully developed eggs are from 0-46 to 0-47 mm. in length and from 0-28 to 

 0-29 mm. in breadth. An exceptionally large specimen is about 24 mm. in total 

 length. 



The specimens are from Penang I. and the lower reaches of the Patani River ; in 

 both localities they were found together with the examples of C. brachydactyla subsp. 

 peninsularis. There are thirty-one specimens from Penang and two from the Patani 

 River. 



The subspecies sumatrensis was described from Sumatra and has also been 

 recorded from Bombay. 



Genus Paratya, Miers. 



1882. Paratya, Miers, Ann. Mag. Nat. Hist. (5), IX, p. 194. 

 . 1909. Xiphocaridina, Bouvier, Comptes Rendus Acad. Sci. Paris, p. 1729. 

 1917. Paratya, Kemp, Rec. Ind. Mus., XIII, p. 293. 



1 In thirty specimens (from Penang) the numbers of teeth as are follows :— 



Dorsal teeth. 

 I specimen has 13 teeth 

 4 specimens have 15 

 16 



17 



I specimen has 21 



Ventral teeth. 

 3 specimens have 2 teeth. 



3 .. 



4 ,, 



5 .. 



6 ,, 



7 „ 

 9 „ 



I specimen has 



