NO. 2 HARTMAN : NEW SPECIES OF POLYCHAETOUS ANNELIDS 165 



The first segment is enlarged, and projects forward, almost sur- 

 rounding the prostomium. Its dorsal cirrus is a slender, fingerlike pro- 

 jection, its ventral cirrus large, clavate, similar in shape and size to 

 the dorsal cirrus of the second segment. Setal fascicles of the first seg- 

 ment are directed anteriorly and medially (pi. 30, fig. 17). 



Segments 2 to 6 resemble one another in general appearance. Each 

 is provided with tapering dorsal and ventral cirri, the dorsal the larger. 

 Segments 2 and 3 have each 3 or 4 (a fifth may be embedded in the 

 parapodium) heavy falcate spines in the neuropodia (pi. 30, figs. 15, 

 19) in addition to a tiny fascicle of a few, fine, capillary setae (pi. 30, 

 fig. 15). 



Segments 7 to 13 have flask-shaped dorsal and ventral cirri; the 

 bases are thickened, the neck is long, slender, and terminates in a knob 

 (pi. 30, fig. 16). The notopodia and neuropodia are similar to one 

 another in size and structure. There is, in each, a fan-shaped fascicle 

 of numerous long, capillary setae and a few (2 or 3) shorter, spinose 

 setae. 



From segment 14, posteriorly, the dorsal and ventral cirri again 

 resemble those in anterior segments, but are less attenuated distally. 

 The ventral cirri continue large, the dorsal cirri are about as large as 

 the ventral cirri to segment 25, but gradually become smaller pos- 

 teriorly. 



Setal fascicles are fan shaped in the first 46 segments, forming 

 smooth, arcuate series in both notopodia and neuropodia. From the 

 forty-seventh segment, the setae of the notopodia are arranged in whorls, 

 and inserted just anterior to the origin of the dorsal cirrus. Setae con- 

 sist of 5 kinds, together with intergrading forms. ( 1 ) Slender, capillary 

 setae are present in all segments, in both notopodia and neuropodia, 

 though in the neuropodia of segments 2 and 3 they are few and re- 

 duced in size. (2) Spinose setae (pi. 30, fig. 21) occur, in small num- 

 ber, in most segments except the most anterior ones. In the seventh seg- 

 ment there is only 1 (or 2) in a segment, and the spinose region is re- 

 stricted. By the fourteenth segment the longer, superior and inferior- 

 most capillaries are almost entirely replaced by spinose setae. (3) Plu- 

 mose setae (pi. 30, fig. 22) are present in the proximal portions of the 

 fascicles in both podia (pi. 30, fig. 14). (4) Stout spines with hirsute 

 tips (pi. 30, fig. 24) are present in segments 22 to 46. There are 3 to 

 6 in a fascicle, inserted just ventral to the dorsal cirrus and dorsal to 

 the ventral cirrus. They have not been observed in the region where 



