POLYCHAETE WORMS, PART 1 211 



nuclial organs (when everted, form prominent nuchal papillae). 

 Distal ring with 4 small antennae. Basal part of prostomiimi, 

 peristomium, and first few setigeroiis segments more or less fused 

 and involved in the month ventrally (fig. 536). 



First 2 segments with parapodia rudimentary, without notopodia 

 and dorsal cirri; rest of segments with biramous parapodia, each sup- 

 ported by two acicula (liglit colored and do not show through). Kami 

 of parapodia not distinctly separated, appearing as a common lobe 

 with 2 presetal and 1 to 2 postsetal distal lips. Notosetae simple, 

 thin, capillary. Neurosetae compound, spinigerous (fig. 55/t). Dorsal 

 cirri small, globular. Ventral cirri elongate, conical. Anal segment 

 small, with minute anus and with a pair of slender subulate anal cirri 

 (fig. 556). 



Proboscis long, clavate, distally with 4 black hooked jaws; surface 

 of proboscis beset with numerous, minute proboscideal organs. 

 Color: flesh color except for the red coelomic fluid (red blood cells in 

 coelomic fluid) which may give a pink, red or purple color to the body 

 and proboscis, thus the name "bloodworms." The color varies in 

 intensity with the movements of the blood in the body cavity. A red 

 midventral streak present. Mature females pale brown; males cream 

 colored. 



Key to the New England Species of Glycera 



1. Parapodia with a single postsetal lobe and 2 unequal presetal lobes (fig. 53, c-/). 



Globular dorsal cirri on dorsolateral body wall, well above the parapodia. 



Without branchiae G. capitata 



Parapodia with 2 presetal and 2 postsetal lobes (fig. 54, a,b). Globular dorsal 

 cirri at dorsal base of parapodia. With branchiae 2 



2. Branchiae retractile, emerging from posterodorsal side of parapodia; when 



fully extended, form digitiform branched lobes (fig. 54, a,b) . G. americana 

 Branchiae nonretractile 3 



3. Parapodia with 2 digitiform branchiae, above and below the setal lobe (fig. 



55,c,f,g) G. dihranchiata 



With blisterlike branchiae on dorsoposterior bases of parapodia (fig. 54,/,gr). 



G. robusta 

 Glycera capitata Oersted, 1843 



Figure 53 



Rhynchobolus cnpitatiis Verrill, 1881, pp. 289, 296, 311, 316, 317. —Webster and 



Benedict, 1887, p. 726.— Whiteaves, 1901, p. 79. 

 Glycera capitata Sumner, Osburn, and Cole, 1913, p. 623. — Fauvel, 1923, p. 385, 



fig. 151, a-e.— Procter, 1933, p. 140.— St0p-Bowitz, 1941, p. 196, fig. 1; 



1948b, p. 4.— Hartman, 1950, p. 76, pi. 11, figs. 1-4; 1956, pp. 251, 267; 



1960b, p. 96.— Wesenberg-Lund, 1953, p. 48.— Pettibone, 1954, p. 272, fig. 



31, a-d.— Uschakov, 1955, p. 171, figs. 46-47. 

 Hemipodia canadensis Tread well, 1948, p. 40, fig. 25d. 



Description. — Length up to 150 mm., width up to 8 mm., segments 

 up to 150. Segments usually triannulate (may be biannulate or 



