278 PROCEEDINGS OP THE ACADEMY OF [April, 



represented by small linear depressed tufts of capillary setae, the 

 notopoclial setse fewer and less crowded. 



Anterior and posterior abdominal segments are relatively short 

 (one-half to two-thirds as long as wide) and separated by deep inter- 

 segmental furrows; in the middle macerated region the segments are 

 stretched to about twice their diameter. Except at the posterior end, 

 where the segments are somewhat angulated, the body is terete. 

 Pygidium (possibly regenerated) a simple, short, subcorneal ring. 



No gills, genital pores, or lateral sense organs are visible. 



Abdominal tori are short and scarcely visible. The anterior noto- 

 podia bear about ten and the posterior about six crochets, while 

 anterior neuropodia have 16-18 and posterior neuropodia about 10 

 crochets. 



Crochets (PI. IX, fig. 55) very small and all alike, with a distinct 

 shoulder and a swelling neck bearing a very small head enclosed in a 

 large hood. 



San Diego, Cal. ; type only known. 



Eunotomastus gordiodes sp. nov. (Plate IX, fig. 56). 



Evidently an elongated and slender species, but none of the speci- 

 mens is nearly complete. The longest pieces are 60 mm. long and 

 1 mm. diameter. 



Prostomium a minute blunt palpode bearing a pair of nuchal organs. 



Peristomium a truncate, subcorneal, smooth segment slightly longer 

 than somite II and somewhat constricted about the middle. A pair 

 of small spots probably represent openings of the lateral organs. 



The thorax consists of seventeen setigerous segments in addition 

 to the peristomium, terete, of nearly uniform diameter, slightly con- 

 tracted toward the posterior end, very smooth and with faint and 

 often obsolete intersegmental furrows. All of these segments bear 

 small notopodial and neuropodial tufts of setse, the former separated 

 by a distance slightly greater than the latter. A very faint depressed 

 spot on each side of the segment somewhat nearer to the notopodia 

 than the neuropodia seems to be the orifice of the lateral organ; and 

 almost equally obscure pores at the same level and in most of the 

 posterior intersegmental furrows may be genital orifices. 



Anterior abdominal segments scarcely differ from the thoracic, 

 being similar in shape and proportions but less polished and iridescent, 

 farther back they become longer but remain smooth and ill-defined. 

 The largest number of abdominal segments on any one piece is ninety- 

 five. Abdominal neuropodia form distinct ventro-lateral tori, some- 

 what elevated and glandular, connected ventrally only by a glandular 



