226 
A. Alcock — Carcinological Fauna of India . 
No. 2, 
The abdomen consists of seven segments in the male, and 
in the female of all except D. muricata and hybrida. 
of seven 
Key to the Indian species of Doclea. 
"1. Rostrum elongate — one-fourth to two- 
fifths the length of the carapace proper, 
and with the points very widely divari¬ 
cated : the last lateral and the median 
posterior spines of huge size. D. tetraptera. 
i. Two lateral spines 
on the branchial 
region: no medi¬ 
an posterior 
spine. D. ovis. 
I. Pterygostomian 
regions distinctly 
canaliculated fore 
and aft. 
2. Rostrum short — 
one-sixth the 
length of the ca¬ 
rapace proper— 
and with no mark¬ 
ed divergence of 
the tips. 
ii Three lateral 
spines on the 
branchial region, 
the last being 
short: a short me¬ 
dian posterior 
spine : no spines 
on the dorsum of 
the carapace. 
iii. Three lateral 
spines on the 
branchial region, 
the last being, 
like the postero- 
median spine, 
long : a line of tu- 
b e r c 1 e s, two of 
which are usually 
produced to form 
spines, down the 
middle of the 
carapace. 
D. japonica. 
D. canalifera. 
1. Carapace discoid: 2nd pair of trunk - 
legs three to four times the length of 
the carapace: a single series of tuber¬ 
cles or spines down the middle of the 
carapace. . . D. graeilipes. 
II. Pterygostomian 
regions not canal- <{ 
iculated. 
. Carapace globu¬ 
lar : 2nd pair of 
trunk-legs hardly 
twice the length 
of the carapace: 
a short series of 
tubercles or spines 
on either bran¬ 
chial region paral¬ 
lel to a long mid¬ 
dorsal series of 
L tubercles or spines 
T. Tubercles, not 
spines on the ca¬ 
rapace . 
ii Spines not tu¬ 
bercles, on the 
„ carapace. 
D. hybrida. 
D, muricata. 
