278 ZOOLOGY OF THE FAR EAST. 



of 13 to 20 close set teeth/ of which from i to 3 (usually 2) are situated on the carapace 

 behind the orbital notch. The foremost of the series is, as a rule, not situated in front 

 of the middle point of the second segment of the antennular peduncle. There are from 



I to 3 (most commonly 2) sub terminal dorsal teeth and between these and the fore- 

 most of the proximal series there is, in a few cases, a single isolated tooth. The lower 

 margin bears from 6 to 12 teeth (usually 6 to 10) ' which decrease regularly in size 

 from behind forwards. 



The lateral process of the antennular peduncle does not reach the end of the seg- 

 ment to which it is attached. The antennal scale is about 22 times as long as 

 broad. 



In the first peraeopods (text-fig. gb) the carpus is about 2J times as long as broad ; 

 the chela is one third longer than the carpus with the dactylus about i| times the length 

 of the palm. 



The carpus of the second peraeopods (text-fig. 9c) is very slender, from 5| to 7 

 times as long as broad and about one fifth longer than the chela. The dactylus is 



I I times the length of the palm. 



The last three pairs of peraeopods possess the usual large spines on the lower 

 margins of the ischium, merus and carpus. In the third pair (text-figs, gd, e) the pro- 

 podus is from 3i to 3^- times the length of the dactylus (terminal spine included). Ex- 

 cluding the spines the latter segment is from 4^ to nearly 5 times as long as broad : the 

 spines vary in number from 6 to 10. 



In the fifth peraeopods (text-fig. 9/) the propodus is from 3§- to 3^ times the total 

 length of the dactylus. Excluding the spinules, which vary in number from 35 to 

 45, the latter .segment is from 4-|- to 4f times as long as broad. 



The outer uropod bears 8 or 9 movable spines. 



The eggs are very large, from 0-90 to 0'96 mm. in length and from 0-52 to 0-58 

 mm. in breadth. 



Large specimens do not exceed 23 mm. in total length. 



Classified on the lines adopted by de Man in his excellent paper on the races of 

 Caridina nilotica,^ the form from the Tale Sap would find a place near the subspecies 

 gracilipes and bengalensis from both of which it is immediately distinguished by the 

 very large size of the eggs. Eggs of more than 075 mm. have hitherto been known 



'In fifty specimens the numbers of rostral teeth are as follows : — 



Dorsal teeth. 







Ventral teeth. 



(Not including those at apex. ) 



5 



specimens 



have 6 teeth. 



7 specimens have 



13 teeth. 



6 



„ 



7 ,, 



9 



14 „ 



13 



J 



8 „ 



11 )> >> 



15 .> 



II 



,, 



„ 9 „ 



9 



16 ,, 



11 



,, 



,. 10 ,t 



S 



17 ,, 



3 



,, 



.. II .) 



4 



18 ,, 



I 



.specimen 



has 12 ,, 



4 



19 ,, 









I specimen has 20 ,, 

 Twenty specimens have one subtermiaal dorsal tooth, twenty-eight heve two and two have three. 

 5 De Man, Rec. Ind. Mus., II, p. 257 (1908). 



