1903.] NATURAL SCIENCES OF PHILADELPHIA. 417 



strongly serrate convex margin, the teeth becoming smaller basally. 

 Those of the posterior and more ventral group more nimierous and 

 about 4 times as long, relatively slender, pointed, straight or shghtly 

 curved, closely and doubly pinnate with short fine processes. Neuro- 

 podial sets about 20, in 2 irregular vertical rows, rather stout, shghtly 

 bent but scarcely enlarged at the end, the long smooth, simple, shghtly 

 curved point nearly as long as the serrated portion, especially on the 

 ventrahnost setse; teeth of terminal row very large and prominent, 

 followed by from 5-9 rows of smaller ones diminishing toward the 



base. 



Known from the type only, Totomi Sea, 3,729, 34 fms. 



Hylosynda carinata sp. nov. (PI. XXIII, figs. 16, 17.) 



A large species here described from an anterior fragment, consisting 

 of the prostomium and 26 anterior somites, with a length of 26 mm. 

 and a breadth of 10.5 mm. between the setse tips of X, where the body 

 has a wddth on the ventral surface of 6 mm. 



Prostomium very short, twice as wide as long, though this ratio may 

 be due in part to contraction; anterior margin with a deep median sul- 

 cus, on each side of which are the broadly rounded lobes that pass into 

 the bases of the lateral tentacles ; lateral margins strongly convex, and 

 posterior nearly straight. Eyes 2 pairs, black, circular; the anterior 

 facing laterad and slightly dorsad at about the middle of the lateral 

 faces; posterior about i the diameter of anterior, widely separated, 

 but a httle mediad of lateral, on the posterolateral curvature of the 

 prostomium. 



Ceratophore of median tentacle arising from frontal sulcus, its length 

 about equalling prostomium, stout, with a distinct terminal ring; 

 style about U times the length of the prostomium, slightly enlarged 

 near the end, then suddenly contracted into a short terminal filament, 

 which, with the distal portion of the enlargement, is white, the rest, 

 including the ceratophore, coffee-brown. Ceratophores of lateral 

 tentacles continuous with frontal lobes, f the length of median cerato- 

 phore, and of the same shape and color; style similar to median style 

 but more slender, and the relatively longer terminal filament reaching 

 to the beginning of the white zone of the median style. Palpi a trifle 

 longer than lateral tentacles, the base stout, their greatest diameter 

 about ^ prostomium, the terminal half rather slender with a very short 

 terminal filament; longitudinal cihated ridges very strongly developed, 

 2 medial, and 1 each dorsal, lateral and latero-ventral ; surface marked 

 by irregular wrinkles which are of a much deeper brown color than 

 the intervening areas. Pharynx stout, short, when protruded equal to 

 27 



