170 



Records of the Indian Museum. 



[Voi,. XXIV, 



A". Carapace of female not swol- 

 len ; telson with dorsal spines 

 well developed, anterior pair sit- 

 uated in middle or in proximal 

 half of its length. 

 L. Form stout ; rostrum bent 

 downwards, upper border al- 

 most straight with foremost 

 tooth placed very close to 

 apex ; R. 6-8 : 0-2 

 £'. Form slender ; rostrum 

 straight, upper border strong- 

 ly convex with foremost tooth 

 not placed close to apex, R. 

 5-7:0-2 ... 



J' . Rostrum very shallow in lateral 

 view ; two spines at distal end of 

 basal antennular segment ; R. 

 6:1 

 //'. Carpus of first leg about half 

 length of chela; R. 6 : 3 

 /''. Each ringer of first leg with a conspi- 

 cuous comb of spines [two spines at dis- 

 tal end of basal antennular segment] ; 

 R..I2:o 



B'. Hepatic spine absent. 



C. Second legs shorter than first; R. 5 : o 

 C. Second legs longer than first; R 6 : 2 



inornatus, sp. now 



diversifies, sp. nov. 



brocketti Borr. 

 compressus Borr. 



f rater Borr. 



brevinaris Nobili. 

 pusillns Rathbun. 



Section II. Merus of second leg with a spine or tooth at distal end of 



lower border. 



A. Each finger of first leg with a conspicuous comb 

 of spines [hepatic spine present]. 

 B. Supra-orbital spine present [other characters as 



in P. petitthouarsi]; R. 6-9 : 2-5 

 B'. Supra-orbital spine absent. 



C. Merus of second leg with one spine below, car- 

 pus with two terminal spines, inner margin of 

 each finger with a large oval pit ; R. 6-9 : 3-5 



C. Merus of second leg with four spines below, 

 carpus with three terminal spines, inner margin 

 of each finger with a series of small denticles ; 



,.R.7--3 ... 

 A'. Fingers of first leg without a comb of spines. 

 B. Supra-orbital spine present. 

 C. Hepatic spine present. 



D. Distal spine of antennal scale projecting far 

 beyond end of lamella. 



E. Rostrum shallow ; last three legs long and 

 slender, third pair with merus at least 1 1 

 times as long as broad, fifth pair reaching 

 beyond scale. 



F. No conspicuous terminal spine on inner 

 side of carpus of second legs. 

 G. Carpus of first leg at least 1*75 times 

 as long as chela ; chela of second leg in 

 males not more than 1*25 times, in fe- 

 males equal to or a little shorter than 

 carpus; R. 7-9 : 1-3 

 G . Carpus of first leg less than 15 times 

 as long as chela ; chela of second leg 



spiniferus de Man. 



petitthouarsi 

 in). 



(Audou- 



dcnticulatus Nobili. 



igtig, sp. nov. 



