68 THE ANNELIDA POLYCHAETA. 



is rounded and narrows abruptly above to the level of base of the style; 

 at each anterolateral corner it is extended as a prominent, distally gradually 

 narrowing ridge reaching to the anterolateral corner, these ridges corresponding 

 to the large free lobes attached to the ceratophore in the preceding species; 

 style missing in the type. The ceratophores of the lateral tentacles are attached 

 near the anterolateral corners, each projecting sUghtly ectad of directly forwards; 

 the ceratophore is a very short, proportionately thick, cylindrical body; the style 

 is abruptly much thinner, its length not far from twice that of the prostomium; 

 it narrows gradually distad to a moderate, subterminal, fusiform enlargement 

 beyond which is a slender terminal filament. The palpi in the type are near 

 9.5 mm. long, or seven or a little more times as long as the prostomium; each is 

 terete and slenderly tapering, subulate, ending in a rather fine tip. (Plate 10, 



fig. !)• 



The parapodia of the peristomium project on each side in the usual position; 

 the ceratophores of the cirri reach forward about to the level of the anterior 

 margin of the head; the dorsal cirri are much longer than the lateral tentacles 

 but considerably shorter than the palpi; each has the form of the style of a 

 lateral tentacle. 



The metastomial somites are all clearly differentiated below, less distinctly 

 above; they are comparatively long, in the widest part of the body being near 

 one third as long as wide; they are of nearly uniform length over most of the 

 body but in the most caudal region decrease to the pygidium as in the preceding 

 species. The anus is terminal or slightly more dorsal, its border radially ridged 

 or tubercular, no styles present in the type. The nephridial papillae in the 

 anterior region are very minute and at first scarcely evident; in the middle region 

 they are much larger but still comparatively small; each is subcorneal with the 

 narrowed tip bent a little dorsad as usual; each is attached at the extreme caudal 

 margin of the somite. 



The elytra are all missing from the type-specimens. Elytrophores promi- 

 nent, borne on the base of the parapodia and movable with these; present on 

 somites II, IV, V, VII and alternate somites to the twenty fifth as usual, then 

 on the twenty eighth, thirty first, thirty fourth, thirty seventh, fortieth, forty 

 third, forty sixth, forty ninth and fifty second and what seems like the fifty third, 

 the total being twenty-three. 



The parapodia are much elongated, each, exclusive of aciculum, being much 

 longer than the width of the somite to which attached as indicated by the 

 measurements previously given. Each is strongly flattened in the cephalo- 



