NO. 4 HARTMAN : POLYCHAETOUS ANNELIDS 441 



Branchiae are first present from the thirty-second setigerous segment 

 and continued posteriorly to the fourth last segment. They arise from 

 the surface epithelium, within and in front of the notopodial fascicles; 

 they consist of slender, digitate processes at most 3 or 4 lobed and are 

 probably not retractile. 



Nephridia may number only 2 pairs; they lie in setigerous segments 

 5 to 7 ; the external aperture of the first pair appears to be associated with 

 the fifth, the second pair wfth the sixth, neuropodium; the external 

 apertures in these individuals are not enlarged as originally described 

 (Berkeley, 1932, p. 669) ; they may function as genital pores and enlarge 

 only at sexual maturity. Large elongated eggs can be seen through the 

 body wall from the sixth or eighth setigerous segment to the midbranchial 

 region. 



The neuropodial hooks are remarkable in several respects when com- 

 pared with similar structures in other members of this family. There 

 is no indication of a hyaline hood nor place of its attachment. The shaft 

 is short and strong with a conspicuous node (pi. 57, figs. 3, 4) and 

 terminates in a short distal portion surmounted by a long fang and several 

 series of transverse teeth. There are no shoulder and neck as in other 

 species examined. The crest consists of 4 rows of teeth but the uppermost 

 series is to be seen only in lateral view (pi. 57, fig. 3) or by examining 

 the hook from its distal end. The fibrillations are coarse and continued 

 conspicuously through the shaft and into the beak. 



The body terminates posteriorly in a slightly depressed, broadly 

 rounded lobe above which the anal aperture opens; there are no caudal 

 appendages. 



Distribution. — The 3 individuals on which the above account is based 

 were collected at Agate Beach, under Yaquina Head light, along a rocky 

 beach, and at Lighthouse Beach reef and bight, Coos County, Oregon, 

 among eelgrass root masses in June, 1942. The previous record is 

 Wreck Bay, west side of Vancouver Island, British Columbia, among 

 roots of eelgrass (Berkeley, 1932). 



Genus ANOTOMASTUS, new genus 

 Type A. gordiodes (Moore) 



The body is long, slender and linear. It consists of the thorax of 18 

 or 19 segments and a longer abdominal region wtih many segments. The 

 first segment or peristomium is achaetous. The second or first setigerous, 

 segment is provided with notopodia only. The third to seventeenth or 



