1910.| J. R. HENDERSON & G. Marruar: Freshwater Prawns. 285 
outside India. We have a large number of specimens from the 
following localities :— 
Ganjam District (Surada Reservoir and Berhampore), Kistna 
District (Bezawada Anicut), Godaveri District (Rajahmundry), 
Madras District, Chingleput District (Chingleput, Pallavaram, Red 
Hills and Walajabad), North Arcot District (Renigunta), Trichino- 
poly District (Trichinopoly), Tanjore District (Tanjore and 
Tranquebar), Coimbatore District (Karoor). 
We have not so far obtained any specimens from the Western 
side of India. 
Pe Dt eee ler. 
(Pls. xv, figs. 3a—c, and xvi, figs. 3a—/.) 
P. 1d@, Heller, Sitz.-Ber. Akad. Wiss. Wien, Bd. xlv, p. 416, 
tab. ii, figs. 40, 41 (1862); Ortmann, l.c., p. 717 (1891). 
P. sundaicus, Heller, 1.c:, p. 415, tab.'ii, figs. 38, 39 (1862) ; 
Ortmann, l.c., p. 719 (1891); de Man, in Max Weber’s Zool. 
Breebn.,.p. 437; tab. -xxvi, fig. 35, p.437 (1892) > Nobili, Le. 
p. 8 (1903). 
> 
Characters of adult males.—The rostrum extends as far as, ora 
little behind, the distal margin of the antennal squame; its proxi- 
mal portion is deep, and shows slight convexity above, while the 
narrow terminal part is straight or slightly upturned. ‘The tooth 
4 . 12-15 
formula is = ( 
4—6 
teeth are separated by a wider interval than any of the others, 
and these, with in rare instances a third tooth, are on the carapace. 
The two distal teeth are separated by a narrower interval than the 
other teeth, while a somewhat wide gap separates the first of these 
from the proximal series; in some cases there are three teeth in 
the distal series, and very exceptionally four teeth. 
The large chelipedes are slender, sub-cylindrical, and sub- 
equal; their length is more than one and a half times the length 
of the body. ‘The joints are beset with short blunt almost tuber- 
cular spines, which, however, are feebly developed on the ischium 
and fingers. These tubercles are arranged in approximately longi- 
tudinal rows. ‘The proximal portion of the carpus is of the same 
width as the palm, while its distal portion is wider than the latter. 
The palm is very slightly compressed laterally at its distal end. 
The fingers are usually of equal thickness, and the finger-tips are 
incurved ; the inner margin of the immobile finger, and the whole 
surface of the mobile finger are pubescent; the ridges on the op- 
posed edges of the fingers are less strongly developed than in 
P. carcinus and P. maicolmsoni?. The tooth on the immobile finger 
is acute, and in some male specimens from Mangalore, the front 
margin of the teeth on the fingers is somewhat convex ; the teeth 
on the mobile finger are not so wide apart as in P. carcinus and 
P. malcolmsoni; and the proximal tooth is less prominent than 
2 
most commonly —); the first and second upper 
