EllltANTlATE l'OLYCllAETA OF JAl'AN. lui 



Mcixilliiu arc distinctly widened in the middle ; the posterior 

 a|)i»endages are slightly constricted behind maxillae, and then 

 form broad plates witliout a posterior median notch. The great 

 dental plates with (> teeth behind the long anterior fang on the 

 left, and I) teeth on the right. The left unpaired plate witli 11 

 teetli ; and the ])aired lateral plates with 10 teeth each. A 

 single rectangular accessory plate exists on each side. Mandibles 

 with al)i)ut ;> prominent teeth on the cutting edge. 



This species occupies tal)es of grayish mud, internally lined 

 witli the usual tough seci-e^tion and externally strengthened witli 

 l)ine needles, )»ieces of leaf-stalks, straws, sand-grains, fragments 

 of Echinoderm-sliells, and other structures. 



Habitat: — "South of Yedo," 345 fathoms ('•Challenger"); 

 Sagami Bay, 100 fathoms ("Golden Hind'"); Suruga Bay and 

 Totomi 8ea, ol — 749 fathoms ("Albatross"). 



Onuphis wUleniocsii (Mcintosh) . 



PI. I, tig. 7. 



ISSr). Nutliria willemoesii, Mcintosh. " Cli;illciiger " Aiiuel., p. o22 ; 

 ri. XLI, figs. 4—10. 



I'rostniniiiiu witli median and lateral tentacdes of a consider- 

 able Iciigtii : of a [)al(' bull' culoui'. 



The appcai'aiicc of the })ostcephalic region of the dorsum 

 icsciiihlcs Ihal of an A'//?//rt% on account of the great tlevelojjment of 

 the branchiae: but the ventral surface, especially its anterior 

 pîMJs, is ;tt (incf diagnostic. 



Till' lii-1 I'dUi- p;tirs of par;ipo(li;i ;irc dirccb-d anteriorly al(_tiig 

 the \ eilt ro-i;i lera 1 >i(|es of the an((.'rioi' |iarl of body. I']a,ch seti- 

 g(4\)Us loll;' III' ihe-e | i;i 1,1 1 1 h | i;i . i.e.. fi'oni til" lii'st to the fourth. 



