1917-] S. Kemp : Notes on Crustacea Decapoda. 217 



of minute or semi-obsolete spinules in its distal half. The apex 

 in large specimens is simply pointed, without trace of lateral 

 spinules; in smaller but still adult individuals two pairs of very 

 small spinules may be found, not reaching the tip. The outer 

 uropod is narrow, about three times as long as broad, with the 

 external margin in front of the subterminal tooth almost straight. 



Large individuals reach a length of a little over 100 mm. ; 

 the eggs are a trifle larger than in L. tenuipes, from 0*65 to 0*82 

 mm, in length and from 0'56 to o*6i mm. in breadth. 



As regards young specimens it may be noted that the second 

 legs are very long, extending beyond the scale by the chela and 

 practically the whole length of the carpus in an individual less than 

 60 mm. in total length ; this precocious development seems, however, 

 to be unusual. A series of very small specimens from Chittagong 

 indicates clearly that those described by de Man in 1908 as Leander 

 sp., belong to this species. In individuals about 30 mm. in total 

 length the general appearance is closely similar to that of adults ; 

 the rostrum, however, has a less elevated basal crest and is shorter, 

 reaching beyond the antennal scale by at most one quarter its 

 length ; the second legs do not as a rule exceed the scale by more 

 than half the length of the fingers. In still smaller examples be- 

 tween 15 and 20 mm. in length, the rostrum is even shorter, some- 

 times not reaching the end of the scale; it usually bears only a 

 single subterminal dorsal tooth and a reduced number of teeth 

 (from 3 to 6) on the lower border. The second legs reach little, 

 if at all beyond the scale ; the palm is as long or even a little 

 longer than the carpus and the fingers are shorter than in adults, 

 being indeed in very small examples only as long as the palm. The 

 sixth abdominal somite is a little more than half the length of the 

 carapace. The telson tip, in specimens of 30 mm. in length and 

 under, bears two pairs of lateral spinules, the inner pair very 

 long and far exceeding the apex. 



Living specimens are translucent with a faint milky tinge. 

 The lower antennular flagellum, which is deeply pigmented in L. 

 tenuipes^ is quite colourless. The dark gastric mass is frequently 

 visible through the carapace and often the tip of the rostrum and 

 the extremities of the telson and uropods are suffused with red. 



This species was known to earlier authors as " Leander longiros- 

 iris, Say," Miss Rathbun has pointed out that Say never des- 

 cribed a species under such a name, the confusion having arisen 

 from misplaced footnote references in Milne-Edwards' treatise. 

 The latter author described two separate species as " Palemon" 

 longirostris, but suggested the name styliferus for the present form 

 in the errata at the end of vol. III. 



The specimens from Amoy, recorded by de Man ' as L. longi- 

 rostris, Say, have since been referred by that author^ to L. longipes, 

 Ortmann. 



1 De Man, Notes Leyden Mits., Ill, p. 141 ( iS8i>. 



2 De Man, Trans. Llnii.Soc. Zool. (2). IX, p. 409 (i<)07'- 



