1903.] NATURAL SCIENCES OF PHILADELPHIA. 463 



Notopodiiim united with its cirrus for about f of its length, only their 

 ends free as short, pointed, triangular, nearly symmetrical, divergent 

 lobes; postsetal lobe rudimentary; cirrus still retains sensory depres- 

 sion but of much reduced size. 



The setae are of two kinds. Those of the neuropodia are arranged 

 in a single fan-shaped group, larger in posterior than anterior somites, 

 but always very much inferior in size to those of G. foliacea; all are 

 colorless, compound, with very slender tapering delicately fringed ter- 

 minal pieces, which are 3 or 4 times as long in posterior as in anterior 

 somites. Notopodial setse are few in number; when most numerous 

 in the posterior region forining a small fan-shaped fascicle; simple, 

 colorless, shorter but stouter than neuropodials, slender, slightly 

 curved, very finely pointed, and with the rather coarse granulations 

 confined to the convex border. 



Pharynx very long, the jaws in its retracted state in somite XLII; 

 the longitudinal muscular fold larger than in G. foliacea, with a corre- 

 sponding groove on the coelomic face of the pharynx, and reaching 

 for the entire length of the proboscis; owing to a half turn of the pha- 

 rynx its posterior end passes spirally around to the ventral side, with the 

 large jaws. Papillae of two forms ; ver}' numerous bluntly conical ones 

 measuring only .003 mm. in height are arranged in close irregularly 

 obhque rows over the greater part of the surface ; somewhat larger ones 

 with compressed bifid summits occur more sparingly and are confined 

 to the muscular ridge. Both have the cuticle thickened and have a 

 single sensory pore just behind the apex. Predental lobes 16 or 18, 

 diminishing slightly in size from the dorsal to the ventral side. Jaws 

 black, opaque, forming a complete ring; larger ones somewhat dorsad, 

 symmetrical, each with four claw-like teeth, diminishing in size dorso- 

 mediad. Accessory jaws in a nearly regular ring, but the alternate 

 ones, owung to somewhat smaller size, stand a little anterior to the 

 others; with the exception of a very few unifid and trifid ones, all are 

 bifid, and of similar form, with the two teeth nearly equal and some- 

 what divergent, the bases irregularly rounded or with a pair of rather 

 short forwardly directed processes; 13 occur between the dorsal inter- 

 space, and 18 or 19 ventrally, the latter distance being al^out twice the 

 former, and the jaws consecjuently less crowded. 



The color is pale yellow, the cirri and other terminal parts of the pos- 

 terior parapodia with some brownish-yellow pigment; anterior part 

 of body very pale with a jjinkish iridescence. 



A noteworthy feature is the occurrence in this species, as in G. foli- 

 acea, of ventral, intersegmental dark spots on the posterior region. 



