716 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [18] 



Length, 4-o"'°i. 

 Number of segments, 33. 



Sexual (capillary) setfe on the male appear at the twelfth segment, 

 and exist on all save the last 3-5 segments. 

 • Common at low water on shells, &c. 



P^DOPHYLAX Claparede. 



P^DOPHYLAX HEBES, U. Sp. 

 (PL. Ill, Figs. 31-36.) 



In this species the head (fig. 31) is very short, the width being more 

 than double the length ; the anterior angles are very broadly rounded ; 

 the anterior and posterior margins but slightly curved. Eyes, six; the 

 anterior pair mere specks ; the posterior pairs on each side very close 

 to each other, sometimes in contact ; large, circular. 



Palpi very large, without indication of division above; below, a nar- 

 row sulcus; their length is more than double the length of the head. 



The median antenna arises close to the posterior margin of the head, 

 and reaches to the middle, or a little beyond the middle, of the palpi. 

 Its form seems to be variable, but in general the inner third is narrow; 

 the middle third somewhat enlarged; the outer part narrowed, but not 

 so much as the basal part. The lateral antennae are mere buds, about 

 the size of the tentacular cirri. 



The buccal segment is about one-half as long as the second segment ; 

 its cirri very short. 



The pharynx, in one specimen, occupied the first five segments; the 

 stomach three to four. In another the stomach occupied the eighth and 

 ninth segments. 



The dorsal cirri are a trifle larger than the tentacular cirri, but very 

 .small ; and although the posterior cirri are a little larger than the an- 

 terior, they are always smaller than the ventral cirri. These last are 

 conical, minute, arising from the body, within the foot, and reaching 

 about to the apex of the foot. The feet are short, stout, fleshy. 



There are two kinds of setfe, simple and compound, with certain slight 

 form variations in each series. On the anterior segments the setfE are all 

 compound (figs. 33, 34), short, with short appendix. At about the begin- 

 ning of the middle third the simple setfe appear. These are, at first, 

 straight, single pointed setfe (fig. 35), placed dorsally, one to each bundle. 

 On a few of the posterior segments these are replaced by shorter setae^ 

 which have a second sharp point developed below the terminal point 

 (fig. 36). 



The anal segment is a little longer than the segment preceding it ; it 

 bears three anal cirri — a short median and two lateral — which are 

 double the length of the median antenna. They are more or less fusi- 

 form. 



