296 DR. J. G. DE MAN ON SPECIES OF PAL^MON 



javanicus from Java and Sumatra, Falcemon {Parapalamon) SorsUi, de Man, from 

 Celebes, and P. {Enpalcemon) elegcms, de Man, from Java. A female with eggs of 

 P. javanicus. Heller, described by myself in the ' Notes from the Leyden Museum,' i. 

 1879, p. 181, is now before me, and also type specimens of P. elegans from Buitenzorg. 

 The female of P. Sorstii is still unknown, so that the type specimens of this species 

 were not required. 



The female of P. elegans differs at first sight from our female of P. asperulus by 

 the legs being much more slender and by the slender carpus of the second legs being 

 distinctly longer than the palm ; the abdomen is not carinate, and there are other 

 differences. 



The abdomen of P. Javanicus is also rounded, without a trace of the longitudinal 

 carinoe that are characteristic of the Chinese species. In the female of P. javanicus 

 all the legs are, moreover, more slender. The carj)us of the first pair is twice as long as 

 the hands. In the second legs, which are also considerably more slender than those of 

 P. asperulus, the palm appears in the right leg just as long as, but in the left distinctly 

 shorter than, the cai"pus. 



The legs of P. (Parapalcsmoti) Sorstii are short and stout, and evidently bear a close 

 resemblance to those of P. asperulus ; but if my figures of the second legs of the male 

 (in Max Weber's ' Decapoden des Indischen Archipels,' 1892, Taf. 27. fig. 39) are 

 compared with the figure of P. asperulus in von Martens's paper, there can be little 

 doubt that the sjiecies are different. The rostrum closely agrees in both species, but in 

 that of P. Sorstii there are four teeth on the cephalothorax. 



P. (Parapalcemon) asperulus, v. Martens, has hitherto only been observed at 

 Shanghai. 



Pal^mon (Macrobrachium) latimanus, v. Martens. (Plate 18. figs. 9-12.) 



Palamon latimanus, von Martens, Archiv Naturg. Bd. xxxiv. 1868, p. 44. 



Palcemon latimanus, de Man, Arcliiv Naturg. Jahrg. liii. 1888, p. 557; and in Max Weber's Zoolog. 



Ergebn. Reise Niederl. Ost-Indien, ii. 1892, p. 477, Taf. 28. fig. 45 ; and in Abhandl. Sencken- 



bergisehen Naturf. Gesells. Bd. xxv. Heft 3, 1902, p. 780. 

 Palcemon [Macrobrachium) latimanus, Nobili, Annali Museo Civico Geneva, Ser. 2, vol. xx. (xl.) 1900, 



p. 485, figs. 3 a-c & 4. 

 Palamon latimanus, Sehenkel, in Verhandl. Naturf. Gesells. Basel, Bd. xiii. Heft 8, p. 512 (1902). 



Five adult males and one young female from Dinawa, Owen Stanley Range, 120 miles 

 inland from Yule Island, at an altitude of 4000 feet. 



In the third of my papers quoted above I supposed that the two male specimens from 

 Celebes, 107 mm. and 103 mm. long, were adult, because they were even a little longer 

 than the type specimen described by von Martens, which measured 97 mm. The 

 five adult males from Dinawa, which are all about the same size, are, however, still 

 considerably larger, for they measure from tip of rostrum to the end of the telson 130- 

 140 mm. Specimens of this size have never been examined, so far as I am aware. 

 Unfortunately, however, they have all lost the legs of the second pair, but one second 

 leg is lying loose in the bottle. 



