chamberlin: pacific coast polychaeta. 267 



Six specimens from Mendocino (M. C. Z. 75) are also referred to this 

 species. They agree closely in most features though the branchiae 

 are shorter and the uncini are apparently slightly more slender. 



32. Thelepus crispus Johnson. 



Proc. Boston soc. nat. hist., 1901, 29, p. 428, pi. 17, fig. 175-178b. 



Several small specimens of this species were collected by Mr. Agassiz 

 at Crescent City, others at San Francisco, and many at Mendocino. 



Sabellidae. 



33. EuDiSTYLiA POLYMORPHA (Johnson). 



Bispira polymorpha Johnson, Proc. Boston soc. nat. hist., 1901, 29, p. 429, pi. 

 17, fig. 179-183; pi. 18, fig. 184, 185. 



Five specimens of this form were taken by Mr. Agassiz in the Gulf 

 of Georgia, Washington, and preserved free from their tubes. Three 

 of these are exceptionally large, one having a width across thorax of 

 nearly 20 mm. In addition to these specimens (M. C. Z. 485) there 

 are several specimens in situ in their tough cartilaginous tubes (M. C. Z. 

 486). 



34. DiSTYLIA MONTEREA, Sp. nOV. 



In comparing Mr. Agassiz's Gulf of Georgia specimens of E. polymorpha with 

 Johnson's types of that species it was noted that a specimen from Pacific 

 Grove labeled by Johnson as one of the paratypes was not conspecific or even 

 congeneric with the others. In size, form, coloration, and general appearance 

 it is remarkably similar to polymorpha, but that it is really generically distinct 

 is at once shown by the fact that the inferior setae of the collar-fascicle are 

 lanceolate instead of spatulate in form. These setae are also much fewer in 

 number than in polymorpha. The inferior thoracic setae of the other seg- 

 ments, however, are of the usual spatulate form. Another readily noted differ- 

 ence, which at the same time separates this species from Distylia rugosa 

 (Moore), is that there are only seven setigerous thoracic somites instead of 

 eight. Whereas in rugosa the eyes are very numerous, approximating one 

 hundred on each radiole, in the present species they are very sparse, most 

 radioles lacking them entirely; when present they are usually two on a radiole 



