1923] NATURAL SCIENCES OF PHILADELPHIA 245 



in all. Another specimen (cotype) from the same cluster is 22 

 mm. long with the gills only 7 mm. and 58 segments. This is a 

 female filled with nearly mature ova. Most of the specimens, 

 being contained within the tubes, were somewhat softened and 

 otherwise not in good condition for description. 



From the type of Notaulax this species differs in having collar 

 setae fascicles of the ordinary form and the spatulate thoracic 

 setae mucronatc. 



Stations 4394, off Santa Catalina Islands, kit. 32° 54' 20" N., 

 long. 121° 15' W., 2259 fathoms, soft gray mud; 4397, lat. 33° 10' 

 15" N., long. 121° 41' 15" W., 2196 fathoms, gray mud (type and 

 cotype) ; 4427, off Santa Cruz Island, 447-510 fathoms, black mud. 



\ Myxicola pacifica Johnson. 



Two fine specimens of 67 and 37 mm. respectively agree well 

 with the description of both this and M. affirms Bush which appears 

 to me to be the same species. In the designation of thoracic 

 segments, Miss Bush does not enumerate the acha?tous peristomiura 

 as a distinct segment. The lateral eye-spots of the larger specimen 

 are orange, of the smaller black. 



Stations 4430, off Santa Cruz Island, 197-281 fathoms, black 

 sand; 4464, off Point Loma Lighthouse, 36-51 fathoms, soft dark 

 gray mud. 



Eachone magna sp. nov. Plate XVIII, flgs. 45, 46. 



Branchiye unknown, missing from both specimens. 



Collar typical, very high and prominent, especially ventrally 

 where it equals the combined length of the first two segments. 

 Margin full, entire, uninterrupted except at the dorsal cleft, 

 where the ends come into contact in a broad sweep and join at 

 their bases the pair of folds bounding the end of the fecal groove. 

 Prostomium a small recurved tulicrcle alcove the mouth. Both 

 tentacles and palps lost. 



Thoracic segments nine (8 setigerous), abdominal 76. Form 

 terete, of nearly uniform diameter to near caudal end where the 

 body is tapered and slightly flattened, without caudal membrane 

 and terminates in a minute trilobed pygidium. Pcristomium a 

 simple ring hidden in the collar. Segments very regularly and 

 sharply defined, the last seven of the thorax and the abdominal 

 to about L equally and strongly biannulate. Fecal groove decii 

 and well defined throughout. Beginning at the caudal end it 

 passes along the middle of the venter to X, around the right side 

 of which and of IX it passes obliquely to the dorsum and continues 



