96 Memoirs of the Indian Museum. [Voiv. IV, 



A. Eyes long and cylindrical ; cornea set very obliquely on stalk . . ciliata, p. 96. 



B. Eyes short and flattened ; cornea set transversely on stalk. 



1, Rostrum without a median distal spine ; a pair of dark spots on 



carapace, usually surrounded by a white ring . . . . ornata, p. 100. 



2. Rostrum with a slender median distal spine; a pair of dark spots 



on carapace not surrounded by a white ring . . . . oxyrhyncha, p. 101. 



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. .. .. .. .. oculata, p. 102. 



B. Breadth of cornea greater than whole length of eye; eight poste- 



rior spines on last abdominal somite ; first lateral carinae of telson 



posteriorly divergent, coterminous with lateral marginal teeth . . megalophthalma, p. 103. 

 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. .. [ferussaci.] 



B. Rostrum almost three times as broad as long ; first five abdominal 



somites without carinae ; telson with one pair of submedian 



carinae . . . . . . . . . . empusa, p. 104. 



II. Telson with full complement of carinae, five on either side of median 

 crest. 



A. Raptorial dactylus with three teeth 1 ; telson carinae not spinous. 



1. 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 . . . . . . . . . . [cerisii.] 



b. Rostrum with sharp median spine and acute or spinous antero- 



lateral angles . . . . . . . . [lessoni.] 



2. Basal process of uropod with two large teeth and numerous 



small spines on inner margin . . . . . . dofleini, p. 104. ■ • 



B. Raptorial dactylus with four teeth, 1 submedian carinae of telson 



with two or three sharp spines, intermediate with two distal 



spinules, first lateral with one . . . . • • pilaensis, p. 105. 



II. 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] . . stylifera, p. 106. 



I. Pseudosquilla ciliata" (Fabricius). 



1787. Squilla ciliata, Fabricius, Mantiss. Insect., I, p. 333- 

 1790. Cancer ciliatus , Iyinnaeus, Syst. Nat., ed. XIII, I, p. 2990. 



1 Including the terminal tooth. 



2 See addendum, p. 196. 



