140 AET. II. A. IZUKA : 



the breadth of segments is about 5 times the length, and at 

 the 60th about 3 times the same. 



Parapodium consists of a shorter rounded anterior and a 

 longer and more conical posterior lobe, the tip of tlie latter 

 pointing dorso -laterally. On the dorsal side of parapodium, near 

 its base, is found a slight elevation, scarcely visible under a 

 low magnifying power, and which contains about three very fine 

 bristles. 



In the 20th parapodium are found both simple and compound 

 bristles ; the former with broad wing, and the latter with distinct 

 terminal teeth covered by a guard. Posterior hook rather slender- 

 tipped, its terminal teeth small, with a distinct incurving of wing 

 just below the large inferiormost tooth. 



The dental apparatus is dark-brown or nearly black. 

 The maxillary forceps about 1| times the length of their posterior 

 appendages ; their tip transparent as that of the teeth of 

 dental plates. A band-like appendage is found on each side 

 of the maxillary forceps. The great dental plates with long and 

 thick teeth, 5 in the left and 6 in the right. The first lateral 

 plate with 2 teeth and the second plate with only one tooth. An 

 accessory small triangular plate is found on each side of the 

 second lateral plate. The mandibles meet closely in the median 

 line ; their cutting edge with 4 coarse tooth-like processes. Just 

 behind the cutting edge there is a brownish-pigmented part, to 

 Avhich converge concentrically arranged, forwardly concave stria- 

 tions. 



Habitat : — ^Yahagi line, 290 fathoms, in Sagami Bay ; " South 

 of Japan " (" Challenger ") ; Yenoshima in Prov. Sagami ; Suruga 

 Bay, 100 fathoms (" Albatross ") ; Sagami Bay, 153 fathoms 

 ("Albatross"). 



