PALAEMON MACROBRACHION. 177 



Pal a em 11 longipes De Haan. 

 De Haan, Fauna Japonica, Crustacea, p. 171. 



This species is positively closely allied to Pal. 

 Idae Heller. (Sitzungsber. Wieu. Akad. Bd. 45. p. 416, 

 taf. II , fig. 40 , 41 and von Martens , 1. c. pag. 39j. 

 Unluckily there are no typical examples of Pal. Idae 

 Heller in the Leyden collection, at least no adult speci- 

 mens , so that it is quite impossible for me to discover the 

 real differences of these species , if they are not identical. 

 The rostrum of Pal. longipes De Haan reaches to or beyond 

 the end of the peduncle of the internal antennae and 



is - — - dentate ; the last tooth of the upper margin is 



situated at a somewhat greater distance from the preceding 

 which extend closely along the upper margin towards the apex. 

 The surface of the cephalothorax is granulated. In a male 

 specimen of a length of 85 mm., the larger leg of the second 

 pair measures 160 mm., being twice as long as the body, 

 the arm being 28 mm., the carpopodite 47 mm., the 

 palm 40 mm., and the fingers 23 mm. — The hands are 

 a little spotted , and the fingers are provided with small 

 teeth at their bases , the moveable finger having two teeth , 

 the immoveable only one. 



I may be allowed to add that also Pal. Alphonsianus 

 Hoffm. (Crustaces de Madagascar , p. 33 , pi. IX) will pro- 

 bably prove to be identical with Pal. Idae Heller; but I 

 have not found the authentic specimens of this species 

 in the collection ; however , according to Mr. von Hilgendorf 

 (Baron von der Decken's Reise p. 102) Pal. Idae Heller 

 is also found at Zanzibar. 



P alaemon mac7'ohrachion Herklots. 

 Herklots , Additam: ad Faun. Afric. Occid. p. 15. 

 This species inhabits the western coast of Africa , and is 



Notes from the Leyden IVEuseum. 



12 



