FEOM THE INLA.ND SEA OF JAPAN. 421 



second and sixth are subequal, that the third is the longest and the sixth the shortest. 

 The chela is almost twice as long as the last joint of the carpus, and the fingers are a 

 little shorter than the palm. 



The legs of the third pair reach to the end of the antennal peduncle, those of the fifth 

 little beyond the anterior border of the carapace. The merus of the third legs is armed 

 on its outer surface near the lower margin with 7 spines, that of the fourth with 6, that 

 of the last pair with 3. 



Geographical Distribution. — Hakodadi, Japan [Stimpson). 



LATREUTES, Stimpson. 



Latreutes PLANiROSTRis (de Haan). 



Cijclorhijndius planirostris, de Haan, Fauna Japonica, Crust. 1849, p. 175, tab. 45. fig. 7. 

 BJiijnchocyclus planirostris, Miers, in Proc. Zool. Soc. 1879, p. 55. 



Latreutes planirostris, Ortmann, in Spengel, Zool. Jahrb., Syst. v. 1890, p. 505, Taf. 37. figs. 4 d-l, 4 n. 

 Platijbema planirostre, Rathbun, in Proc. U.S. Nat. Mus. vol. xxvi. 1902, p. 46. 



One egg-bearing female from the Inland Sea of Japan ; rare. 



This specimen fully agrees with the ova-bearing females described by Miss Rathbun 

 {I. c). It is 28 mm. long from the tip of the rostrum to the end of the telson. The sixth 

 abdominal segment is not quite twice as long as the fifth, and the telson is about once 

 and a half as long as the latter. The carpus of the legs of the first pair is not carinate 

 above. The legs of the second pair extend with their chela beyond the distal end of the 

 antennal peduncles ; the first joint is slightly longer than the thii-d and both together 

 are almost as long as the second ; the cliela, which is a little less broad than the distal 

 extremity of the carpus, is little shorter than the second joint, and the fingers are 

 distinctly shorter than the palm. 



Geographical Distribution.— ia^din. {de Haan) ; Hakodate and North Coast of Nippon, 

 10-20 fathoms [Stimpson); Cape Sima, Nippon, 18 fathoms (Miers) ; Bay of Tokyo and 

 Kagoshima, Japan [Ortmann); Hakodate, Hokkaido [Balhhun). 



Latreutes acicularis, Ortmann. 

 Latreutes acicularis, Ortmann, in Spengel, Zool. Jahrb., Syst. v. 1890, p. 506, Taf. 37. figs. 6, 6 d-k, 6 n. 

 Latreutes acicularis, Doflein, Ostasiatische Dekapoden, 1902, p. 638. 



One ova-hearing female from the Inland Sea of Japan ; deep water. 



This specimen is 31 mm. long from the acute tip of the rostrum to the end of the 

 telson, the carapace (rostrum included) being just half as long. The rostrum, which is 

 one-third longer than the carapace, is unarmed above, except a minute spinule on the 

 carapace, just behind the frontal border ; it exceeds the antennal scales by one-third of 

 its length. That part of the rostrum which is situated above the lateral carinse is low 

 and barely diminishes in height towards the tip ; its upper margin is straight. The lower 

 part of the rostrum is proximally about three times as high as the upper and gradually 

 narrow^s towards the tip ; it is armed near the latter with three sharp teeth. 



Antennal tooth small. Along the distal end of the lower border of the carapace seven 

 slender spines are observed, which diminish a little in length backward, and the foremost 



60* 



