igo8.] Records of the Indian Museum. 263 



carpus has also a spine near the far end. The meropodite of the 

 5th legs has but one spine near the distal extremity, there is also 

 a spine on the carpus near the far end, and one observes five small 

 spinules between this spine and the proximal extremit}^ of this joint. 



The ova are 0*42 — 0'48 mm. long and 0*24 — 0*295 mm. broad, 

 presenting the same size as those of the var. hengalensis and of 

 the var. hrachydactyla. The measurements of ten eggs are as 

 follows : 0*42 X. 0*27 mm, ; 0-42 x 0*29 mm. ; 0*43 x 0*26 mm, ; 0-43 

 XO'28 mm.; 0*44 x 0*24 mm.; 0*44 x 0*27 mm. (two eggs); 

 0"44xo*29 mm.; 0*455 x o"285 mm.; o"46x 0*295 mm. 



The specimens from the Lake Nyasa, described by Dr. Cai- 

 man [I.e., p. 190), are probably to be referred to this variety. 



3. Caridina nilotica (Roux), var. paucipara, M. Weber. 



Tabi,e D. 

 (Plate XX, figs. 4, 4a, 46,) 



Caridina wvckii, Hickson, var. paucipara , Max Weber, I.e., 

 p. 168. 



This variet}', which inhabits the rivers Umhloti and Umhlasine, 

 and together with the var. natalensis the river Umbilo, all situated 

 in Natal, differs from the typical form of Egypt (i) by the slen- 

 derer dactyli of the 5th legs, which dactyli are armed with 60 — 74 

 spinules instead of 40 — 50 ; (2) by somewhat larger eggs ; and (3) per- 

 haps also by the rostrum. The teeth on the upper edge should be, 

 according to Max Weber, 11 — 20 in number, less, therefore, than 

 in the Egyptian species ; in two of the five co- types the measurements 

 of which are given in Table D the rostrum carries one subapical 

 tooth, in two others this tooth is wanting altogether, in the fifth 

 specimen the tip of the rostrum is injured. The unarmed terminal 

 part is described as being somewhat shorter or just as long as the 

 toothed part of the upper margin ; in No. 2 of Table D the un- 

 armed part appears even a trifle longer than the row of teeth, in 

 No. I it is just as long, and in two other specimens the toothed part 

 appears once and a half as long as the unarmed one. As regards 

 the number of teeth on the lower margin (12 — 18) this variety 

 agrees with the typical form. 



When the measurements of the legs given in Table D are com- 

 pared with those of the Egyptian form in Table A, one observes a 

 close resemblance except only in the proportion between length and 

 breadth of the dactyli of the 5th pair ; in the paucipara specimens this 

 proportion varies between 4*6 and 6*2, in the t^^pical form, however, 

 between 4 and 4*6. It ought, however, to be remarked that in some 

 specimens of both varieties the same number (4*6) sometimes occurs, 

 and in these individuals the dactyli present just the same form. 

 In the egg-bearing female No. i the ischium of the 3rd legs is armed 

 with a spine near the far end of its lower margin ; the meropodite 

 carries three spines, the 2nd somewhat nearer to the distal extremity 

 than to the proximal, the ist midwa}^ between the 2nd and the 



