Remark. The Penaeus monodo7t of Kisiiinouve is no doubt identical with this species. 

 The male from Stat. 323 closely resembles Fig. 1 of Plate II of Kishixouye's paper, except 

 only the coloured rings of the antennal flagella which in this specimen are not visible. 



General distribution: Tokyo Bay and Hay of Ise, Japan, rare (Kishinouye) ; 

 Makassar (de Man); Atjeh (de Man); Singapore (Dana, Nobili) ; Mergui (de Man, Alcock); 

 all round the coasts of India and Ceylon from Karachi to Mergui and the Andamans (Alcock). 

 It is the commonest salt-water prawn of the Calcutta market (Alcock). 



t45- Penaeus indicus H. Milne-Edw., var. longirostris de Man. 



. Penaeus indicus H. Mihie-Edw., var. longirostris J. G. de Man, in; Max Weber's Zoolog. 

 Ergebn. II, 1892, p. 511, PI. XXIX, Fig. 53, 

 Confer also: A. Alcock, Catal. Indian Decap. Crust., Part III. Macrura. Fasc. i. Calcutta, 

 1906, p. 12. 



Stat. 47. April 8/12. Bay of Bima. Shore. 6 specimens. 



Stat. 213. September 26— October 26. Saleyer-anchorage and Surroundings. Depth up to 36 m. 

 Coralreefs, mud and mud with sand. 5 females. 



The type specimen of this variety, a young male from Makassar, preserved in the 

 Zoological Museum of the University of Amsterdam, was again examined and the specimens, 

 collected by the "Siboga", proved to belong to it. 



According to Alcock, who (1. c.) has first clearly characterized P. indmis, the rostrum 

 "projects in young individuals far beyond the tip of the antennal scale, whereas in adults it is 

 often not longer than that of monodon\ The five females from Saleyer are adult, but their 

 rostrum is comparatively as long as in young individuals and their carapace 

 fully resembles Alcock's figure 3^;. For the rest these specimens fully agree with his description 

 and figures. 



The largest female is 165 mm. long, the youngest 125 mm. In all these specimens the 

 rostrum projects with one third to two fifth parts of its free portion beyond 

 the antennal scales and in all it is more or less strongly curved upward. 

 The rostrum of the youngest female is more strongly curved upward than that of the other 

 specimens and f -dentate ; the foremost tooth of the upper margin, situated just above the 

 second of the lower, is a little more distant from the tip of the rostrum than from the frontal 

 border of the carapace. The rostrum of the four other specimens is |-dentate ; in two the foremost 

 tooth of the upper border is still a little farther distant from the tip than from the frontal 

 margin, but in the largest female the foremost tooth, implanted ju.st above the third of the 

 lower, appears slightly farther distant from the frontal margin than from the tip of the rostrum. 

 In all the five females 3 teeth are on the carapace and in all the groove on either side of the 

 rostrum ends beside the i^' (epigastric) tooth. As regards the height of the rostral crest, these 

 specimens are quite typical. The post-rostral carina, though not grooved, shows usually two or 

 three shallow pits. 



In the largest individual the upper (outer) antennular flagellum, measuring t^-}^ mm., 



103 



