96 Memovrs of the Indian Museum. 
A. Eyes long and cylindrical ; cornea set very obliquely on stalk .. 
B. Eyes short and flattened; cornea set transversely on stalk. 
t. Rostrum without a median distal spine; a pair of dark spots on 
carapace, usually surrounded by a white ring .. ac 
2. Rostrum with a slender median distal spine; a pair of dark spots 
on carapace not surrounded by a white ring sie 
II. Telson with four pairs of carinae on either side of median crest, the 
first lateral present. 
A. Breadth of cornea scarcely equal to whole length of eye; six 
posterior spines on last abdominal somite; first lateral carinae 
of telson parallel, terminating behind base of intermediate 
marginal teeth. s oe 55 
B. Breadth of cornea greater thad whole jen of eye; eight poste- 
rior spines on last abdominal somite; first lateral carinae of telson 
posteriorly divergent, coterminous with lateral marginal teeth .. 
B. Basal process of uropods with a single large additional tooth or with a 
series on inner margin. 
I. Telson with not more than three carinae on either side of the median 
crest. 
A. Rostrum less than twice as broad as long; abdomen with nine fine 
longitudinal carinae; telson without submedian carinae. AB 
B. Rostrum almost three times as broad as long; first five abdominal 
somites without carinae; telson with one pair of submedian 
carinae ae 36 ie oc 
II. Telson with full complenent of carinae, five on either side of median 
crest. 
A. Raptorial dactylus with three teeth!; telson carinae not spinous. 
I. Basal process of uropod bearing three large teeth, one terminal 
and two on inner margin. 
a. Rostrum with sharp median spine and obtuse antero-lateral 
angles es : is oe 
6. Rostrum with sharp isda spine and acute or spinous antero- 
lateral angles “5 : oe 
2. Basal process of uropod with two large teeth ay numerous 
small spines on inner margin st : : 
B. Raptorial dactylus with four teeth,! submedian carinae of telson 
with two or three sharp spines, intermediate with two distal 
spinules, first lateral with one +. a 
If. Dactylus of raptorial claw with spinous termination, but without teeth on 
inner margin. [Rostrum longer than broad; ophthalmic somite largely 
exposed; eyes long with very oblique cornea; telson with intermediate 
carinae; basal process of uropod terminating in a single large tooth} .. 
1. Pseudosquilla ciliata’ (Fabricius). 
1787. Syuilla ciliata, Fabricius, Mantiss. Insect., I, p. 333- 
1790. Cancer ciliatus, Linnaeus, Syst. Nat., ed. XIII, I, p. 2990. 
! Including the terminal tooth. 
2 See addendum, p. 196. 
[Vor. IV, 
ciliata, p. 96. 
ornata, p. 100. 
oxyrhyncha, p. 101. 
oculata, p. 102. 
megalophthalma, p. 103. 
[ferussaci.] 
empusa, p. 104. 
[ceristt.) 
[lessont.] 
dofleini, p. 104. 
pilaensis, p. 105. 
stylifera, p. 100. 
