5o 



nearer to the 2 Dd submedian spine than to the posterior one of the three and is slightly larger 

 than the latter. 



Three or four microscopical spinules exist moreover, between these spines, on the lateral 

 parts of the gastric region. Behind the cervical groove the upper part of the branchial region 

 is covered, between the larger spines, which occur also in the adult, with very small spinules, 

 that are numerous and crowded on the posterior half, but that gradually disappear anteriorly, 

 though well-developed spinules exist also on the posterior border of the lateral, descending 

 parts of the cervical groove; a small number of these spinules occur also on the posterior half 

 of the cardiac region. These small spinules are partly bordered anteriorly by microscopical 

 setae. In the adult female from Singapore all these minute spinules on the posterior part of 

 the carapace 'were worn off, like also their setae, and they did appear as minute tubercles 

 or granules. 



While in the adult Panitl. polyphagus the abdom'inal terga are perfectly smooth, one 

 observes on the tergum of the 2 nd somite of this young specimen still a shallow, rudi- 

 mentary, transverse furrow, which was not mentioned by Doflein; the breadth of this 

 furrow, which is not interrupted in the middle line and situated slightly in front of the middle, 

 measures only one-third the width of the 2 nd somite. The following somites appear, however, 

 already quite smooth, but I should not be surprised, when, in still younger individuals, also 

 the 3 rd or even also the 4 th somite should present traces of a similar, rudimentary furrow. 



In this species the external maxillipeds, viz. those of the 3 rd pair, bear no exopod, but 

 the exopod of the 2 nd maxillipeds already fully resembles that of the adult: the stalk extends 

 to the distal 5 Ul part of the merus-joint of the endopod, while the flagellum, already 9-articulate 

 and fully resembling the quoted figures 59 and 590, slightly surpasses the carpus. 



The i st article of the antennular peduncle extends to the 2 nd third part of the terminal 

 joint of the antennal peduncle, the 2 nd almost to the apex of this joint, so that the 3 rd article 

 surpasses the antennal peduncle almost by its whole length, in the adult female, however, only 

 by half its length. As regards the spinulation of the antennal peduncle, the young specimen 

 agrees with the adult, except the terminal joint that bears, just behind the distal spine, on the 

 outer margin another spine which is much smaller and behind the latter still a rudimentary 

 spinule. In this young male the legs of the i st pair reach the apex of the penultimate article 

 of the antennal peduncle, those of the 2 nd pair project by their dactyli beyond the apex of 

 this article and surpass the i st article of the antennular peduncle by one-third of their dactyli; 

 the legs of the 3 rd pair are the longest of all and extend by their dactyli to the apex of the 

 antennal peduncle; the legs of the 4 th pair project by their dactyli beyond the penultimate 

 antennal article, while those of the 5 th attain the middle of it. 



As regards the coloration I wish only to remark that the abdomen has a verdigris 

 ground-colour, like the carapace, the antennal and antennular peduncles and the legs, but that 

 between the posterior margin of each somite and the white band in front of it the colour is 

 of a fine blue. 



General distribution: Pamilirus polyphagus (Herbst) is at present with certainty 

 known from Sonmiani (Balutschistan) (Balss), Bombay (Nobili), Minikoi (Borradaile), Mauritius 



