FEOM THE INDO-PACIFIC AND WEST AFEICA. 



293 



Measurements in millimetres. 



Pal^mon (Parapaljemon ?) ASPERULUS, V. Martens. (Plate 18. figs. 2-S.) 



Paltemon asperulus, v. Martens, Archiv Naturg. xxxiv. Jahrg. 1868, p. 43, Taf. 1. fig. 5. 

 Paloemon asperulus, Ortmann, Zool. Jahrb., Syst. v. p. 708. 



One young female from South Hu-peh, China. British Museum (Natural History). 



Though P. asperulus was described a third of a century ago, it has apparently never 

 been observed since that time, and, so far as I am aware, no mention of this species 

 has been made since 1868, except by Dr. Ortmann, who, however, did not have any 

 specimens at his disposal. We must therefore regret that only one young female has 

 been collected, for, according to von Martens, P. asperulus is a common species in the 

 fish-market of Shanghai. 



Our female is 47 mm. long from tip of rostrum to the extremity of the telson, quite 

 young therefore, this species attaining, indeed, a length of 83 mm. The rostrum (fig. 2) 

 is short and reaches to the distal end of the antennulary peduncles ; it is lanceolate, and 

 appears very slightly arcuate above the eyes. The upper margin bears 10 equal teeth, 

 the first of which is placed just twice as far from the posterior as from the anterior 

 margin of the ccphalothorax. This first tooth stands a little farther from the second 

 than the following teeth, that are equidistant and reach to the tip of the rostrum. The 

 under edge bears 3 teeth, which are smaller than those of the upper margin ; the first 

 is situated just below the seventh tooth of the latter, and these teeth have also about 

 the same length and extend to near the tip. The rostrum has a stout shape and that 

 part which is situated above the lateral crest appears, iu the middle of the rostrum, 



42* 



