164 PROCEEDINGS OF THE ACADEMY OF [Jan., 



especially in the presence of mucronate paleee in the thoracic tori and 

 in the greater number of setae and palese in the abdominal somites, as 

 well as in the form of the palea and pick-shaped uncini and the arrange- 

 ment of the eyes. 



Sm-uga Bay, 3,707, 63-75 fms., 4 specimens, with tubes. 



Dasychone japonica Mcintosh. 



The specimens have a length of 40 mm., the branchiae being 13. 

 There are 8 setigerous thoracic and 76 abdominal somites and 28 to 30 

 branchial plumes. With the exception of occasional variations having 

 a second small accessory tooth, the uncini are exactly as figured by 

 Mcintosh. The tentacles are lanceolate, + the length of the branchiae 

 and thickly spotted ^\^th reddish-browm. Two specimens, one in a 

 membranous tube to which various foreign bodies are attached, from 

 an imknown station. 



The first dorsal appendage of each branchial radiole is fully twice as 

 long as and much thicker than any of the others, and is single, and not 

 paired, as the others are. The collar begins dorsally as a prominent lobe, 

 which includes the first fascicle of setae; ventrally it is thickened and 

 the ventral lobes overlap medially for nearly their entire width. 

 There are no lateral incisions. 



Laonome tridentata n. sp. (PI. XII, fig. 44.) 



The type and only specimen is 44 mm. long without branchiae, 

 which are 9 mm. in length; the thorax is 7 mm. long and 4 mm. 

 diameter. 



The detached branchiae found in the same bottle are not known 

 with absolute certainty to belong to this species. The basal part of 

 each palp forms an undivided plate about twice the length of the peris- 

 tomium and of a scroll-like form with a slightly spiral roll. Each 

 bears 15 rather thick short radioles not exceeding twice the diameter of 

 the thorax. The longest barbs or filaments at the base have a length 

 equaUing about ^ of the body diameter, and they diminish toward the 

 end, where the radiole terminates in a slender naked filament longer 

 than the longest barbs. There are no eyes. 



The peristomial collar is about as long as the second somite, slightly 

 more produced on the ventral side and consequently somewhat oblique. 

 It is deeply cleft in the middle line dorsally and slightly so ventrally, 

 but without lateral incisions. It is thick and stift^, with the margin 

 entire and slightly produced, but not lobed ventrally. 



There are 8 setigerous thoracic and 62 abdominal somites. The 

 body is slightly flattened, with a nearly uniform width, tapering some- 



