NOTES OX JAPANESE SCHIZOPODA. 



251 



middle of last abdominal segment. Telson longer than last abdominal 

 segment ; apex obliquely truncate and provided with about 7 uniform 

 spines ; lateral margin with spines which in general grow longer 

 posteriorly and are divided into about seven sets by repeated occurrence 

 of markedly shorter spines at intervals of some five or more longer 

 ones in succession. Inner branch of uropods nearly equal in length 

 to telson ; spines on the ventral side near otocyst 3 in number. 

 Average length of body 8.2 mm. 



Localities. Off Oarai on the coast of Prov. Hitachi. Off 



Maisaka on the coast of Prov. Tötömi. 



Notes. — Characteristic to the species is the fact that the abdomen is grooved and spinulated. 



5. Metamysis sagamiensis n. sp. 

 Plate VIII., fig. 32. 



Diagnosis. Carapace with acutely pointed rostrum. Abdomen 



smooth. Antennal scale extending far beyond antennular peduncle. 

 Labrum with a short anterior projection. Each leg with a strong 

 meropoditc and a short ischiopoditc. Basal joint of the exopodite of 

 thoracic limbs provided with only a few short spines at the 'antero- 

 lateral corner. Fourth pleopod of male slightly exceeding in length the 

 penultimate abdominal segment ; the two terminal filaments about three 

 times as long as the joint bearing them. Telson (fig. 32) equal in 

 length to that of the two posteriormost abdominal segments taken 

 together ; gently tapering behind to the broad apex with four uniform 

 and remarkably strong spines ; lateral margin of telson with 5-6 

 spines near base, thereafter spineless for a short length, and finally again 

 with a row of spines, of which every third one is much longer than the 

 rest. Inner branch of uropod reaching to tip of telson, slightly dilated 

 at the position of otocyst ; seven spines on the ventral side near otocyst. 

 Outer branch of uropod reaching a little beyond the four spines at the 

 apex of telson, 5 times as long as broad. Length of body 12. mm. 



