214 



Records of the Indian Museum. 



[Vol.. XIII, 



Lcander styliferus (Milne-Edwards). 

 (Plate viii, fig. 2.) 



1837. Palemon longirostris, Milne- Edwards, Hist. Nat. Crust., II, p. 394. 



1840. Palemon styliferus, Milne-Edwards, ihid., Ill {errata), p. 638. 



1893. Leander longirostris, Henderson, Trans. Linn. Sac {2), V, p. 439. 



1902. Palaemo)! styliferus, Rathbun, Proc. U. S. Nat. Mus., XXVI, p. 51. 



1903. Leander longirostris, Nobili, Boll. Mus. Torino, XVIII, no. 452, p. 7. 

 1908. Leander sp., de Man, Rec. Ind. Mus., II, p. 220, pi. xviii, fig. 3. 

 1915. Leander styliferus, Kemp, Mem. Ind. Mus., V, p. 273. 



The rostrum is long, reaching beyond the apex of the anten- 

 nal scale by a distance varying from one third to three fifths of 



its length. The proximal portion 

 is strongly elevated dorsally form- 

 ing a well-marked basal crest 

 which bears from 5 to 7 (usually'' 

 6) ' procurved teeth. The teeth 

 increase in size from behind for- 

 wards ; the hindmost is frequent- 

 ly situated on the carapace be- 

 hind the level of the orbit and 

 the foremost reaches little if at 

 all beyond the end of the first 

 segment of the antennular pe- 

 duncle. In front of the basal crest 

 the rostrum is slender and up- 

 turned ; for the greater part of 

 its length it is usually unarmed, 

 but near the tip is as a rule pro- 

 vided with from i to 3 * small 

 widely separated teeth. The 

 lower margin bears from 6 to 10 

 teeth (usually 7, 8 or 9)^; the 

 proximal teeth are generally ra- 

 ther closer together than the dis- 

 tal and the hindmost is usually 

 situated a little behind or a lit- 

 tle in front of the foremost tooth 

 of the basal crest (pi. viii, fig. 2). 

 The carapace bears a small and 

 inconspicuous antennal spine ; the 

 branchiostegal is much larger, situated on the frontal margin 

 and is flanked by a short and blunt carina. Above the branchio- 



FiG. 5. — Leander styliferus, Milne- 

 Edwards. 



Carapace, rostrum, etc., in dorsal 

 view. 



A Of forty specimens thirteen have 5 basal teeth, twenty-three have 6 and 

 ff)ur have 7. 



^ 1 have seen one specimen without any teeth on the distal part of the upper 

 margin, one with 4 teeth and one with 5. 



3 Of forty specimens two have 6 inferior teeth, fourteen have 7, twelve have 

 8, eight have 9 and four have in. I have seen single examples with 5 and 11 teeth 

 and Nobili records specimens, one from Bombay and one from Borneo, with 12 

 and 13 inferior teeth. 



