Zool.— Vol. I.] JOHNSON—PACIFIC COAST ANNELIDS. 163 



ventral peristomial cirri. Parapodia biramous. Dorsal ramus with two kinds 

 of paleae: (1) a group of small, narrow ones projecting laterally (figs. 21, 22a); 

 and (2) a crown of broad, oblanceolate ones on the dorsum. Aciculae two. 

 Dorsal cirri present on all somites, three to many-jointed, proximal joint 

 much the largest. Ventral cirri very short, inserted above the level of low- 

 est ventral seta;. 



Heteropale bellis, sp. nov. 

 Plate VI, Figs. 20-23. 



Body elongate-elliptical, slightly and about equally tapered at each end, its 

 length less than six times its width. 



Prostomium rounded, coalesced with first somite. Eyes four, forming 

 a square on top of head; the anterior pair considerably larger, crescent- 

 shaped. Median cirrus or "tentacle" unjointed, up-curved in a hook-like 

 fashion, in length equal to the antenna?. 



Two globular palpi, somewhat constricted at base. Antennae two, two- 

 jointed; tentacular cirri two, three-jointed, about equal to the antennae, short 

 and stumpy, the proximal joint about equal to the two terminal ones. Dorsal 

 cirri present on all the somites, increasing in length and number of joints 

 caudal until in the ultimate segments they reach nearly to the tips of the 

 setae. In the anterior somites they do not reach the tip of the neuropo- 

 dium and have only three joints. Ventral cirri likewise increase in length 

 and number of joints caudal, but in less degree. 



First pair of parapodia directed forward, armed with a small fascicle of 

 setae and three or four paleae. No obvious dorsal ramus. Succeeding para- 

 podia with a two-parted dorsal ramus. Its lateral division, nearly as long as 

 the ventral ramus, carries three or four paleae much narrower, smaller, and 

 straighter than the rest; these point laterally in line with the ventral rami (fig. 21). 

 The acicula extends into this division. Dorsal portion of notopodium with 

 a semicircle of paleae, thirteen or fourteen in number, the largest external, 

 and diminishing towards the median line. Oblanceolate, acuminate; tip di- 

 rected obliquely, mediad or laterad (fig. 22) ; convex border of palea and seven 

 or eight of its ribs elegantly adorned with minute, rounded embossments. 

 Other ornamentation in form of longitudinal ribs and fine transverse stria- 

 tions. The palea; of each somite overlap those of the succeeding somite, 

 and over- or underlap the tips of their fellows on the foot of the opposite side. 



Somites, 27 to 39. Terminal somite destitute of paleas and setae, but with 

 two anal cirri. 



Measurements. — Length of small specimen, 2.75 mm.; greatest transverse 

 diameter of same, .44 mm. 



Two specimens found among tunicates, sea-weeds, and 

 debris on the piles of the wharf at Monterey, December 23, 

 1896. 



Not without reluctance I have made this beautiful little 

 Annelid the type of a new genus. It differs strikingly from all 



