284 Records of the Indian Museum. [VOLL Wt 
teristic of males are absent in the female. Ina speciinen measuring 
118 mm. in total length, the joint-measurements are as follows :— 
(eer O orth T')2> Cet Ce om hOn emia 
The body is smooth and exhibits none of the roughness 
characteristic of males. 
Females with eggs vary from go to 118 mm. in total length; 
the largest specimen from Tanjore is without eggs, and measures 
33 mm. in length. 
Characters of young individuals.—In individuals under 110 mm. 
in total length the rostrum may be slightly upturned distally, and 
may extend a little beyond the distal margin of the antennal 
squame. 
A table of measurement taken from male individuals is given, 
to show the changes which accompany growth in regard to the 
relative lengths of the joints of the large chelipedes. 
Total LARGE CHELIPEDE. 
Total 
(eneen length : 
No. | Locality. S. of S| 5 2 s 
He cheli | .E g = E g. 
OCy: | pede. ss o = cs RS 
| 4 a J) AY om 
I | Bezawada ot 68 34°75 Seman ey, S277 ee) 5 
II | Chingelput od 2 40°5 9°5 OTn sere OMG S7, 
III | Surada reservoir .. STAN O2 AIS eG) © | <6) 12 9 
IV | as oe |) oe) 89°75 TEES) | ECs) 23°75) I8°5 | 14 
Wel 5 ate DLS a le72215 20 =| 24°75] 32 28 22°5 
eV eGodavery River) a op ler aera oer PAM Binrial| «639 33 28°25 
VII | Karoor Somlt lthiG | eT gata 28 33. edt 40 29°5 
VIII | Tanjore Seal LOT | sAipsc AVA Nea hk 95 86 | 46°5 
IX | Renigunta a8 | 230 | 442 \S45T 8 | 9274 Mins ce ilaaeaie a9 
| | | | 
No. VIII in the above table, though much smaller than 
No. IX, presents adult characters, and hence it appears that there 
is considerable variation in size in adult males also. 
General remarks.—P. dane, Heller, judging from the original 
figure, is perhaps based on young specimens of P. malcolmsonit. 
Nobili has referred to P. dane certain specimens from Pondicherry, 
the largest of which measured 65 mm. in total length; these we have 
little doubt in regarding as young individuals of P. malcolmsonit. 
P. weber, de Man, which is undoubtedly a distinct species, agrees 
closely with P. salcolmsonii in the shape and toothing of the ros- 
trum. It is extremely probable that the common South Indian 
species described above, was one of those originally diagnosed by 
Fabricius, and we possess a well-developed: male specimen from 
Tranquebar, the locality which furnished the Danish naturalist 
with his type specimens. It is impossible, however, to determine 
from his brief descriptions to which of the species it belongs. 
Localities.—This species, originally described by Milne- 
Edwards from Nagpore, is the commonest freshwater prawn in 
Southern India. It has not so far been recorded from any locality 
