io8 



carapace, the 5'^ situated just above the orbital margin. The post-rostral carina is deeply 

 o-rooved and this o-roove is much narrower than the lateral furrows. The telson just as long 

 as the sixth somite terminates in this species more acutely than in P. canaliculatus Oliv. 



P. japonicus also differs from P. canaliculaius by the fingers of the chelate legs that 

 are somewhat longer in pro port ion to the palm, so that those of the 3"! pair 

 are noticeably longer than it. In the very young male from Stat. 16 the fingers are, 

 however, still a trifle shorter than the palm. 



The thelycum agrees with Alcock's figure de (1. c). 



The female from the Postillon-islands has the same size as the preceding and agrees 



with them. 



The young male from the South coast of Timor is 62 mm. long. The rostrum is y-dentate, 

 four teeth are on the carapace. The groove of the post-rostral carina is still quite shallow and, 

 in the middle, even wanting at all. Fingers of the third legs distinctly longer than the palm. 



The laro-er male from Bawean-island measures 80 mm., the other is a little smaller. 

 In both the rostrum is "-dentate, and the 5'^ tooth stands above the orbital margin. The 

 fino-ers of the chelate legs agree with those of the female. 



According to Kishinouye P. japonicus attains a length of 27 cm. 



General distribution: Japan (Spence Bate, Ortmann, Kishinouye, Rathbun, Alcock) ; 

 Loc Choo Islands, Amami Oshima (Ortmann); Amboina (Ortmann); Fiji Islands, Orissa coast, 

 Andamans, Hooghly Delta, off Indus Delta (Alcock) ; Dar-es-Salaam (Ortmann) ; Red Sea (Nobili). 



f49. Penacus latisiihatus Kish. 



Penacus latisnlcatus K. Kishinouye, in: Journal Fisherics Bureau, Vol. VIII, N" i, Tokyo, 

 1900, p. 12, PI. II, Fig. 2 and PI. VII, Fig. 2. 



Penacus latisnlcatus M. J. Rathbun, Proc. U. S. Nat. Mus. Vol. XXVI, 1902, p. 37. 



Penacus canaliculatus J. G. de Man, in: Notes from the Leyden Museum, Vol. II, 18S0, p. 185 

 (the specimen examined). 



Penacus canaliculatus Oliv., var. ?, W. F. Lanchester, in: Proc. Zool. Soc. London, 1901, 

 p. 571, PI. XXXIV, Fig. 5. 



Penaeus canaliculatus Oliv., var. australiensis J. G. de Man, in: Abhandl. Senckenb. Natur- 

 forsch. Gesells. Bd. XXV, 1902, p. 905 (the specimen examined). (nee: Penaeus canali- 

 culatus Oliv., var. australiensis C. Spence Bate, Report Challenger Macrura, 1888, p. 248, 

 PI. XXXII, Fig. 3). 



Stat. 179. September 2/3. Kawa-bay, West coast of Ceram. Reef. 5 males and 4 females. 

 Stat. 213. September 26— October 26. Saleyer-anchorage and Surroundings, including Pulu 



Pasi Tanette, near the North-point of Saleyer-island. Reef. i young female. 

 Stat. 234. November 19/20. Nalahia-bay, Nusa-Laut-island. 46 m. Stony bottom. i female. 

 Stat. 248. December 4/5. Anchorage off Rumah Lusi, North-point of Tiur-island. Reef. i very 



young female. 



Through the courtesy of Professor Ehlers I received from the Museum of Göttingen the 

 type specimen of Penamis plebejus Hess, described by W. Hess in his "Doctor-Dissertation", 

 entitled "Beitrage zur Kenntniss der Decapoden-Krebse Ost-Australiens. Bonn, 1865". Together 

 with this specimen, an adult female, from Sydney, I received from the same Museum another 



108 



