292 
ZOOLOGY OF THE FAR EAST. 
Caridina weberi, de Man. 
subsp. sumatrcnsis, de Man. 
1892. Caridina weberi var. sumatrcnsis, de Man, in Weber's Zool. Ergebn. Reise Nied. Osi- 
hid., 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 locaHties they were found together with the examples of C. hrachydactyla 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 1 5 
16 
8 
6 
S 
3 
I specimen has 
17 
18 
19 
20 
21 
Ventral teeth. 
3 specimens have 2 teeth. 
I specimeu has 
