416 PROCEEDINGS OF THE ACADEMY OF [June, 



The 2cl parapodium (1st setigerous) is, as usual, shorter and its ven- 

 tral cirrus longer than the others, but is peculiar in this species in that 

 it is wddely separated from the 3d and projects forward by the side of 

 the mouth. Its ventral cirrus is quite distinct from the foot, and arises 

 from a lobe which is carried forward to a position partly beneath the 

 base of the palp, so that it actually arises between the tentacular 

 cirrus and the palp. Typical parapodia moderately developed, with 

 short, thick, obtuse neuropodia and fairly well-developed notopodia 

 occupying the usual position; neuropodial aciculum especially stout, 

 a slight angulation of the foot at the point of its emergence. Dorsal 

 cirri with prominent postero-dorsal ceratophores and stout erect styles 

 mth a slight subterminal enlargement and flowing terminal filament ; 

 each marked at about the middle with a • blackish-brown ring ; if 

 depressed they would reach just beyond the tips of the ventral setae. 

 Toward the posterior end they become more slender and lose the sub- 

 terminal enlargement; the last 3 diminish rapidly in length, and are 

 carried horizontally behind with the pair of anal cirri, which are simi- 

 larly formed, but the largest appendage of the body, and in addition to 

 the middle brown ring, have a narrow basal one. 



The 18 pairs of elytra occur on II, IV, V, and every alternate somite 

 to XXVII inclusive, then on XXVIII, XXX, XXXI and XXXIII. 

 The first is orbiculo-quadrate, the next two slightly emarginate, the 

 following ones obliquely ovate with the posterior internal margin more 

 strongly convex than the antero-external ; the point of attachment is 

 a little caudad of the middle of the long axis and somewhat toward the 

 antero-external border. A dense fringe of cilia extends over about 

 ^ of the lateral margin of each, principally that part which projects 

 freely at the sides; the entire dorsal surface is thickly covered with 

 small angulated or prismatic papillae with thickened cuticle, w^hich are 

 very densely aggregated in a narrow zone contiguous to the ciliated 

 margin of the scale ; 1 or 2 papillae of the same form but 4-5 times as 

 large may also be present. The 1st scale is peculiar in the character 

 of its papillae, many of which are tall, slender cones of various sizes, 

 about five or six of them being very large, with a height almost equal 

 to the short diameter of the scar. A few similar but smaller papillae 

 may occur on the 2d, 3d and last scales. Most of the elytra have merely 

 a small but very conspicuous brown spot over the place of attachment, 

 but the anterior ones are blotched, and the posterior speckled, with 

 brown. 



Notopodial setae colorless, in 2 groups, the anterior of about six, 

 very short, stout, strongly curved, with a short smooth tip and 



