57 



The male from Makassar is 90 mm. long. Post-rostral crest continued almost to the 

 posterior margin of the carapace and the blunt carinae on the i^' to y^ abdominal somites are 

 already traceable. The two branches of the petasma are not j-et united and, conform to this 

 immature state, the notch and the tooth on the merus of the 5"^ pair are still rudimentary, while 

 the fine denticulations on this joint and the subterminal lobule of the ischium are still wanting. 



The female from the east coast of Sumbawa is 115 mm. long and already completely 

 agrees with the adult specimen from Stat. 2. I will only remark that the telson just reaches 

 beyond the tip of the inner uropod. The antennal flagellum, 285 mm. long, measures 2,5-times 

 the length of the body. 



The male from Stat. 318 is young, 75 mm. long. The rostrum, more strongly directed 

 upward than in the other specimens, is 1 1 + i dentate and reaches to the end of the antennular 

 peduncle. Post-rostral crest quite obvious, as also the carinae on the i^' — 3*^^ abdominal terga. 

 Tomentum more conspicuous than in other specimens of the same size. Branches of petasma 

 not yet united. The 5''' legs reach almost with their dactyli beyond the tip of the scales; there 

 is a tracé of the notch at the proximal end of the merus, but the tooth, the denticulations and 

 the lobule of the ischium are fully wanting. Antennular flagella as in the preceding specimens. 

 Telson much shorter than the inner uropod. Perhaps a local variety. 



Remarks. The type specimens of Spence - Bate's Pen. incisipes do not more exist in 

 the British Museum, but Fig. 2 of Plate XXXIV of the Challenger Report evidently refers to this 

 species, the 5* legs presenting all the distinctive features of it. As regards, however, the figures 2" 

 (Petasma) and 2'" (Thelycum) I don't venture to give any opinion; they are perhaps inaccurate. 



General distribution: Alongr the coasts of India from the Indus Delta to Hongkong 

 (Alcock); East Indian Archipelago (Atjeh; Makassar; fresh-water of the river at Maros; Pare- 

 Pare; brackisch water of the river Tjenrana at PaUma, Celebes) (de Man); Philippine Islands 

 (Spence Bate) and at the coasts of Japan (Kishinouye). 



Haswell records this species from the Endeavour River, Oueensland, and, according to 

 HiLGENDORF, it should also occur at Ouellimane. 



f19. Penaeopsis affinis (H. M.-Edw.). 



Metapeneiis affinis A. Alcock, Catal. Indian Decapod Crust. Part III, Macrura. Fase. I, The 

 Prawns of the Peneiis group. Calcutta, 1906, p. 20, PI. III, Fig. 8, 8« — b (ubi synon.). 



Penaeus affinis K. Kishinouye, in: Journal Fisheries Bureau, Vol. VIII, N" i, Tokyo, 1900, 

 p. 16, PI. IV, Fig. I, PI. VII, Fig. 5. 



Stat. 4. March 9. 7°42' S., 114° 12'. 6 E. Anchorage off Djangkar (Java). 9 m. Coarse sand. 



I very young specimen, 28 mm. long, probably belonging to this species. 

 Stat. 19. March 19/21. 8°44'.5 S., 116° 2'. 5 E. Bay of Labuan Tring, west coast of Lombok. 



18 — 27 m. River-mud, coral, coralsand. i young female and i still younger male. 

 Stat. 47. April 812. Bay of Bima, near south fort. 55 m. Mud with patches of fine coral 



sand. 3 very young males and 3 females of the same size. 

 Stat. 213. September 26 — October 26. Saleyer-anchorage and Surroundings. Reef. i young 



male and 2 young females. 



When describing Pcti. monoceros., I have pointed out (p. 55) that the petasma was not 



57 



SIBOGA-EXPEDITIE XXXIX a. " 8 



