Zoological results of a tour in the Far East . p. 50 (1902). 2 Stimpson, Proc. Acad. Sci. Philadelphia, i860, p. 28. 3 De Man, loc. cit., 1908, p. 269. * Balss, Abhandl. Klasse K. Bayer. Akad. Wiss., Suppl. Bd. II, Abh. 10, p. 25. Crustacea Decapoda and Stoniatopoda. 277 would appear that there is a discontinuity in the distribution of this form. It occursin India and Ceylon on the one hand and in Celebes, N. China and possibly Japan onthe other hand, but is apparently absent from Java, Sumatra and the Malay Penin-sula. Max Webers extensive collections of Atyidae from Java and Suma
Zoological results of a tour in the Far East . p. 50 (1902). 2 Stimpson, Proc. Acad. Sci. Philadelphia, i860, p. 28. 3 De Man, loc. cit., 1908, p. 269. * Balss, Abhandl. Klasse K. Bayer. Akad. Wiss., Suppl. Bd. II, Abh. 10, p. 25. Crustacea Decapoda and Stoniatopoda. 277 would appear that there is a discontinuity in the distribution of this form. It occursin India and Ceylon on the one hand and in Celebes, N. China and possibly Japan onthe other hand, but is apparently absent from Java, Sumatra and the Malay Penin-sula. Max Webers extensive collections of Atyidae from Java and Sumatra seem toindicate that no form of the wide-spread C. nilotica occurs in those islands, while, judgingfrom Dr. Annandales collection, the species is represented in the Malay Peninsulaonly by the distinct variety described below. Caridina nilotica (Roux),subsp. macrophora, subspecies of Caridina nilotica, readily distinguished by the very large size ofits eggs from all the Asiatic races hitherto known, was found by Dr. Annandale in the. Fig. 9.—Caridina nilotica, subsp. macropiiora, , rostrum, etc., in lateral view. d. Third peraeopod. First peraeopod. e. Dactylus of same further enlarged. Second peraeopod; /. Fifth peraeopod. Tale sap in Peninsular Siam. It occurred only in the inner part of the lake in waterthat in all probability is permanently fresh. The rostrum (text-iig. ga) usually extends a little beyond the apex of the antennalscale. In lateral view it is directed somewhat downwards in its proximal half, whiledistally it is a little ascendant. The proximal part of the upper margin bears a series 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 carapacebehind the orbital notch. The foremost of the series is, as a rule, not situated in frontof 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 thes
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