NOTES OX JAPANESE SCHIZOPODA. 



249 



with a large otolith ; with a dense row of spines closely ventral to 

 otocyst as in the species jnst mentioned. Average length of body 

 7.8 mm. 



Locality. The species is found in abundance in the so-called 



Lake of Hamana, Prov. Tötömi, which is in fact a brackish inlet of 

 the sea. It also occurs in the Gulf of Tokyo. 



Notes. — This species closely resembles A', japonica, but is distinguishable from it by the 

 pointed rostrum. It differs from N. kadiakrnsis of Alaska in the shape of antennal 

 scale and in the structure of propodite. 



3. Ncomysis s£>iiiosa n. sp. 

 Plate VIII., figs. 4, io, 31. 



Diagnosis. Carapace with acutely pointed rostrum (fig. 4). 



Each of the four anterior abdominal segments with a tranverse ridge 

 in the middle ; the fifth abdominal segment with two and the last 

 segment with four, transverse rows of short spines. Eye globose ; eye- 

 stalk rather long, its proximal half densely beset with spinules (fig. 4) 

 and with an elevation on the dorsal side of the distal half. Antennular 

 peduncle (fig. 10) very robust ; male sexual appendage of an elongate 

 and somewhat triangular shape. Propodite of all legs consisting of 5 

 joints ; dactylopodite distinctly claw-like. Outer branch of fourth 

 pleopod in male, scarcely reaching the middle of last abdominal 

 segment, the two terminal filaments about three times as long as the 

 distal joint of the branch. Telson (fig. 31) much longer than last 

 abdominal segment, linguiform, somewhat constricted near to base, 

 gradually tapering towards truncate tip; lateral spines strong and 

 uniform in the proximal half of margin, but in the distal half of same 

 arranged in about eight successive sets, each set being composed of 

 two or three equally long spines followed with a longer and stronger 

 spine. Inner branch of uropod shorter than telson ; spines on the 

 ventral side near otocyst 6-7 in number. Outer branch of uropods a 

 little longer than the inner. Average length of entire body 10. mm. 



