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VIII. Oil some Species of the Genus Palsemon, Fabr., from Tahiti, Shanghai, Neio 

 Ouinea, and West Africa. By Dr. J. G. de Man, of lerseke [Holland). 

 {Communicated by the Rev. T. R. R. Stebbing, M.A., F.B.S., Sec.L.S.) 



(Plates 18-20.) 



Eead 3rd March, 1904. 



IHE following Report contains the description of some species of the genus Talcemon, 

 Fabr., several of -^bich were sent to me for examination by Prof. P. Jeifrey Bell, of the 

 British Museum (Natural History), whereas the others, belonging to my private collec- 

 tion, were gathered in fresh water at Catumbella, near Benguella, by Mr. P. Kamerman, 

 tlie same gentleman to wliom I am also indebted for the interesting Brachyura from 

 Angola described four years ago in Memoires Soc. Zool. de Prance, 1900, pp. 31-65, 

 pis. i., ii. One species from Catumbella has not previously been observed in West Africa, 

 and may even eventually prove to be new to science ; another, from Cameroon, unfortu- 

 nately represented by only one specimen, seems to be the rare P. Foai, Cout., the exact 

 habitat of which is still unknown ; and finally a remarkable hitherto unknown character 

 of P. asperulus, v. Martens, was observed, namely, that some segments of the abdomen 

 are carinated. 



The following species are described : — 



Palcemon {Eiijmlamon) lar, Fabr. 

 Pal(emon (Parapalamun ?) aspervlus, v. Martens. 

 Falcemon [Macrubrachium) latimanus, v. Martens. 

 Palamon [Eupalannui)) macrobrachion, Herklots. 

 Palcemon [Eiipalcemon) Foai, Cout. 



Palamon (MacrobracJiinm) jamaicensis (Herbst), 



var. Vollenhovenii, Herklots. 

 Palcemon [Macrobrachium) Olfersii, Wiegm. 

 Paliemon [Macrobrachium ?) sp. 



A.— INDO-PACIEIC SPECIES. 



Pal^mon (EuPALiEMON) LAR, Fabr. (Plate 18. fig. 1.) 



Confer: Spence Bate, Report on the 'Challenger' Macrura, 1888, p. 789, pi. 129. fig. 1; de Man, 

 Notes from the Leyden Museum, i. 1879, p. 168 (sub nomine Pal. ornati, Oliv.), and in Max 

 Weber, Zoolog. Ergebn. Reise Nicderl. Ost-Indien, ii. 1892, p. 445, and Abhandlungen der 

 Senckenbergischen Naturf. Gesellschaft, Bd. xxv. Heft iii. 1902, p. 774. 



Pour adult males from fresh water at Tahiti. British Museum (Natural History). 



The tooth-formulse and the measurements of the legs of the second pair are indicated 

 in the Table. These specimens closely resemble the figure quoted from the ' Challenger ' 

 Report. The rather slender rostrum is as long as or somewhat longer than the peduncles 



SECOND SEKIES. — ZOOLOGY, VOL. IX. 42 



