Crustacea Decapoda and Stomatopoda. 289 
sides, with a broad pale bar running from the rostrum to the tip of the telson, 
and with the edges of the uropods irregularly pale. Occasionally the whole animal 
was dead black, except for the longitudinal mid-dorsal bar, which was then yellowish, 
and for the pale edging to the uropods. Chinese individuals were similarly coloured, 
but were as a rule rather paler. 
The parasitic Temnocephalid, Caridinicola, was very abundant on the Chinese 
specimens. 
The Japanese specimens were obtained at Hikone on the eastern shores of 
Lake Biwa and in ditches at the edge of the Seta River at its exit from the 
lake. The Chinese specimens were found in creeks and irrigation channels at the edge 
of the Tai Hu lake in Kiangsu province. 
Caridina laevis, Heller. 
1862. Caridina laevis, Heller, Sitzber. K. Akad. Wiss. Wien, XL,V, p. 411. 
1892. Caridina laevis, de Man, in Weber's Zool. Ergebn. Reise Nied. Ost-Ind., II, p. 376, 
pi. xxiii, fig. 27. 
1905. Caridina laevis, Bouvier, Bull. set. France Belgiqiie, XXXIX, p. 74. 
1913. Caridina laevis, Bouvier, Trans. Linn. Soc, Zool. (2), XV, p. 464. 
A large number of specimens of this species have been presented to the Indian 
Museum by the late Dr. W. C. Hossack, who obtained them in September 1916, in Lake 
Situ Bagendit, Garut, Java, at an altitude of about 3000 ft. The series includes a 
number of ovigerous females and agrees very closely with de Man's description 
of specimens from the same locality. Caridina laevis is known only from Java. 
Caridina scrrata, Stimpson. 
i860. Caridina serrata, Stimpson (not of Richters),i Proc. Acad. Sci. Philadelphia, p. 29 
(98 of reprint). 
1905. Caridina serrata, Bouvier, Bull. sci. France Belgique, XXXIX, p. 76. 
The species does not seem to have been found since it was briefly described 
by Stimpson from Hong Kong more than fifty years ago. The specimens collected by 
Dr. Annandale are also from Hong Kong and agree fairly well with the original 
description. 
The rostrum (text-fig. 12a) is very short but varies somewhat in length. In lateral 
view it is horizontal or inflected downwards and its apex may fall a little short of, or 
reach a little beyond the end of the first segment of the antennular peduncle. In dorsal 
view it is comparatively very broad at the base and bears above from 5 to 18 (nearly 
always 9 to 14)' small forwardly directed teeth, of which from i to 3 are usually situated 
on the carapace behind the orbit. The teeth are largest proximally and the series 
extends along almost the whole length of the upper border. Stimpson does not make 
any reference to teeth on the lower border of the rostrum, from which it might well be 
1 Caridina serrata, imperfectly described by Richters as a new species in Mobius' Meeres fauna Mauritius, p. 163, 
pi. xvii, figs. 24-27 (1880), is different. Thallwitz in 1892 suggested for it the name C. richlersii (Ahh. Ber. K. Zool. Mus. 
Dresden, 1890-91, no. 3, p. 27). 
• Ip seventeen specimens, in which the rostrum is complete, the numbers of teeth are as follows ; — 
