

1909.] NATURAL SCIENCES OF PHILADELPHIA. 249 



Collected by Prof. E. C. Starks at San Diego, Cal. Besides the 

 nearly complete type there is a fragment of the reproductive region 

 of a male and one of a female, both fully mature and probably nearly 

 ready to separate and swarm. 



The occurrence of a Eunice with the habits of a "palolo" worm on 

 the California coast is of much interest, and it is to be hoped that 

 some zoologist on the ground will determine its life-history and es- 

 pecially the habits of swarming and if possible the conditions affecting 

 it. While the species is closely related to Eunice viridis and E. 

 siciliensis it is readily enough distinguished from both. - 



Eunice biannulata Moore. 



Eunice biannulata Moofe, Proc. Acad. Nat. Sci. Phila., 1904, pp. 487-490; 

 PI. XXXVII, figs. 10-18; Plate XXXVIII, fig. 42. 



San Diego, type and cotype only. 

 Marphysa stylobranchiata sp. nov. (Plate VII, figs. 8-12). 



Form moderately stout. Length about 100 mm., the longest 110 

 mm. long and 4.5 mm. in maximum width at about XXX. Number 

 of segments 142-160. 



Prostomium about one-half as wide as long, divided anteriorly 

 into two broadly rounded prominent entire lobes which exhibit no 

 ventral furrow or swelling. Tentacles five, smooth, short, thick, 

 sausage-shaped, arranged in a slightly curved row near the posterior 

 end of the prostomium; middle one longest, nearly equal to length of 

 prostomium, the outer pair shortest, about two-thirds length of middle 

 tentacle. Eyes small, behind interval between outer and middle ten- 

 tacles, or absent. 



Peristomium about three times as long as first setigerous segment, 

 perfectly naked, divided into two rings probably representing seg- 

 ments, the posterior slightly more than one-half anterior, from which 

 it is separated by a continuous faint groove. Laterally the anterior 

 ring projects somewhat forward and is united with the sides of the 

 prostomium, thus concealing a small internal or mandibular lobe. 

 Remaining segments well defined by deep furrows, all short, strictly 

 uniannular, generally one-sixth to one-eighth as long as wide. To 

 about somite VIII the body is quite terete, but soon becomes wider 

 than deep, the ratio in the middle region being about as five to three. 

 Posteriorly the body tapers, first gently, then rapidly, to the pygidium, 

 which is short, annular, radially furrowed or rosetted and bears a pair 

 of rather stout, tapering ventral cirri as long as the last five or six 

 segments and below these a second pair of minute cirri. 



