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precisely shaped as in Alcock's figure, while it did perfectly well resemble the figure in the 

 paper of Kishinouye, and I supposed this difference to be due to the young age of the 

 specimens that were collected. The same fact is shown by the petasma of the present species : 

 it perfectly well agrees with the Fig. 5 in Kishinouye's paper, as it terminates in a cross piece 

 (Spence Bate, in: Ann. Mag. Nat. Hist. Sept. 1881, p. 179), and it therefore shows another 

 form as in Fig. 8« of Professor Alcock's Monograph. This different appearance, in my opinion, 

 is similarly due to the young age of these specimens. 



The male from Stat. 213 is 63 mm. long. The rostrum, which is slightly directed 

 upward, is 9 + i dentate and resembles Fig. Sd of Alcock's paper; it just extends beyond 

 the tip of 2"^^ antennular article. External maxillipeds projecting as far forward as the antennal 

 peduncle. The legs of the i^' pair reach to the base of the terminal joint of the antennal 

 peduncle, while those of the 3"^ pair extend to the middle of 2"'^ antennular article; the 4"^ 

 legs are but a little shorter than the antennal peduncle, while those of the 5'^^ reach to the distal 

 5'^ part of the antennal scales. Three anterior pereiopods with a strong spine at base. In the 

 merus of the 5"^ legs the notch and the twisted tooth near the proximal extremity are already 

 conspicuous. The form of the petasma will be best understood by the figure. The tubercle 

 on the outer margin of the basal article of the uropods and the emargination on the external 

 margin of the outer uropod are already well developed. The three males from Stat. 47, that are 

 hardly 60 mm. long and the young male from Stat. 19 agree with the described specimen. 



The female from Stat. 19 measures "jy mm. The rostrum, 9+ i dentate, is as long as 

 the antennular peduncle and distinctly curved upward. The post-rostral carina, though low and 

 blunt, is traceable to near the hinder edge of the carapace. As regards the relative length 

 of the pereiopods this female resembles the male described above. The thelycum agrees with 

 Kishinouye's Fig. 5 A on Plate VII. 



The other females are of the same size or younger. 



General distribution: Penaeopsis affinis has been recorded by Col. Alcock from 

 various localities on the coast of India (Orissa coast, Ganjam coast, Madras, Colombo and 

 Karachi), while, according to Kishinouye, this species is rather widely distributed from the 

 Tokyo Bay to Formosa, but he adds that, as its distribution is restricted to very shallow parts 

 only, the catch of this species is not abundant. Singapore (Nobili). 



f 20. Penaeopsis elegans (de Man). 



Metapeneus elegans J. G. de Man, in: Notes from the Leyden Museum, Vol. XXIX, 1907, p. 130. 

 Stat. 121. July 14/16. Menado-anchorage. 55 m. 2 males. 



This species, belonging to that section of the genus in which the telson carries no 

 lateral marginal spinules, most closely resembles Pen. affinis (H. M.-Edw.) ; it is described as 

 a new species, because the petasma has a different form and because the legs of the 5'^ pair 

 are shorter — with some doubt, however, for the two specimens are probably not yet full-grown. 



The two males are 81 and 75 mm. long. The slender rostrum that in both specimens 



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