208 



Length of the merus 

 „ „ „ carpus 



„ „ „ propodus 



. dactylus 



)f the leg of the 5"' pair 



5 

 1,62 



2 



1,6 

 0,6 



\" 1 the young male, N° ia the ova-bearing female from Stat. 4; N° 2 egg-bearing 

 female from Stat. 96; N° 3 young female from Stat. 154; N° 4 female from Stat. 193; N° 5 

 young male from Stat. 261. 



3. Processa japonica (de Haan). PI. XVIII, Fig. 53- 



00 



k. 



Nika japonica W. de Haan, Fauna japonica, Crustacea, 1849, p. 1S4, Tab. XLVI, fig. 6 



and Tab. N. 

 Nika japonica A. Ortmann, in: Zool. Jahrb. V. Abth. f. Syst. 1S90, p. 529. 

 Nika japonica F. Doflein, Ostasiatische Dekapoden, München, 1902, p. 641. 

 Nica japonica H. Balss, Ostasiatische Decapoden II. Die Natantia und Reptantia. München, 



1914, p. 61. 



Stat. 71. May 10 — June 7. Makassar and surroündings. Up to 32 m. Bottom mud. Sand 



with mud; Coral. 1 young male. 

 Stat. 164. August 20. i°42'.5 S., I30°47'.5E. Between Misool and New Guinea. 32 m. Bottom 



sand, small stones and shells. 1 specimen. 

 Stat. 313. Febr. 14,16, 1900. Anchorage East of Dangar Besar, Saleh Bay. Up to 36 m. 



Bottom sand, coral and mud. 1 young female. 



Upon my request Dr. J.J. Tesch, at that time Conservator at the Leyden Natural History 



Museum, has been so kind to examine for me the three type specimens of de Haan's Nika 



japonica, still preserved in that institution, viz. two specimens in a dry state, long respectively 



44, S mm. and 40 mm. from tip of rostrum to tip of telson, and one ova-bearing female in 



spirit, long 22 mm. 



The largest of the three specimens, collected by the "Siboga", is that from Stat. 164, 

 of which the sex could not be ascertained, because the pleopods of the 2 nd pair are damaged ; 

 this specimen is 28 mm. long. The carapace, rostrum included, is 9,1 mm. long, nearly one- 

 third the entire length, and 1,9 mm. high in a lateral view, so that it shows a rather slender 

 shape, being almost 5-times as long as high : the shape of carapace and abdomen is more slender 

 than in de Haan's figure, but this species shows probably similar variations as Pj'oc. canaliculata 

 Leach (vide S. Kemp, The Dècapoda Natantia of the coasts of Ireland, Dublin 1910, p. 124). 



The upper border of the carapace appears straight in a lateral aspect and terminates 

 anteriorly (Fig. 53, 5317) into the triangular rostrum that is a little shorter than the eyes; the 

 rostrum, as long as broad at base, appears slightly curved transversely, when looked at 

 from before, and appears anteriorly obtusely carinate in the mid-dorsal line, the carina fading away 

 in the middle; the lateral margins are also carinate and in a lateral view the rostrum appears 

 very low, the apex obtuse. The specimen from Stat. 313, which is a little smaller, carapace 

 and rostrum being together 7,5 mm. long, shows the same characters of the rostrum, but in 

 the young female from Stat. 71, in which carapace and rostrum are together only 5 mm. long, 

 the rostrum is a little longer than broad at base. Both by de Haan and Ortmann the rostrum 



