1908.] Records of the Indian Museum. 269 



The meropodites of the 5th pair — nine times as long as broad — 

 are armed with one spine just beyond the middle and another near 

 the distal extremity ; also a spine near the distal end of the carpus. 

 The dactyli, which are armed with 45 — 55 spinules^ have the same 

 slender shape as in the var. gractlipes, being five or more than 

 five times as long as broad. 



The eggs (fig. 6b) are a little larger than those of the vai. 

 gracilipes ; the}^ are usually 0*45 or o'46 mm. long and 0*28 mm. 

 or 0*3 mm. broad, the length var^ang between 0*42 mm. and 0*49 

 mm., the breadth between o"25 mm. and 0*3 mm. Females (i5'5 

 mm. long) gathered in December in the brackish ponds of Port 

 Canning are already provided with eggs which are of just the same 

 size as those of the largest specimens, as, e.g., those of the female 

 (28 mm. long) collected in November. 



This variet}^ has also been observed by Henderson at Madras 

 and by Nobili at Pondicherry. 



6. Caridina nilotica (Roux), var. wyckii (Hickson). 



Dr. Caiman {I.e., 1907, p. 190) has pointed out, as was already 

 made probable by Prof. Bouvier, that the species described by 

 Hickson {I.e.) as Atya wyckii, has the first carpus exactly as in the 

 types of Car. longirostris,H. M. Edw., and he adds that specimens 

 received from Prof. Hickson agree very closel}^ with the var. niina- 

 hassa described by me, differing chiefly in the shorter dactylus 

 of the three posterior legs, that of the 4th pair being less than one- 

 fifth, and that of the 5th pair one-fourth of the corresponding pro- 

 podus. Hickson's species, which was discovered in Lake Tondano, 

 situated also in that mountain district of Minahassa, Celebes, thus 

 proves to be a proper variety distinguished from the var. mina- 

 hassa, de M., as from the var. longirostris , H. M. Edw., hy the 

 short dactyli of the three posterior legs. Unfortunately neither 

 Hickson nor Caiman indicate the size of the eggs. Hickson's 

 variety is not lying before me, so that as regards the other 

 characters of this form I must refer to his paper. 



7. Caridina nilotica (Roux), var. hrachydactyla nov. 

 TABI.E G. 

 (Plate XX, figs. 8 a — c.) 



Synon. : Caridina wyckii, de Man, I.e., 1892, pp. 386 — 393, 

 tab. xxiv, fig. 29/, 29g, 29/, 29?^, 29^, 2<:)cc, 2gdd (typical form). 



The preceding remarks about the var. wyckii (Hickson) prove 

 at once that that form which I considered in 1892 {I.e.) to be the 

 t^^pical form of Car. wyckii, is, indeed, quite distinct, differing 

 chiefl}^ by the more slender carpus of the 1st pair of legs. This carpus, 

 indeed, appears 2"i — 2-5 times as long as broad, presenting the same 

 form as in the typical Car. nilotica from the Nile. This variety, 

 which has been observed on the islands of Celebes, Salej^er and 

 Flores, may henceforth be known under the name of hrachydactyla. 



