1903.] NATURAL SCIENCES OF PHILADELPHIA. 461 



Goniada distorta sp. nov. 



This species is described from a single incomplete specimen consist- 

 ing of 106 somites and having a length of 66 mm., and in the anterior 

 region a width of body of 2 mm. and between the tips of the parapodia 

 2.8 mm., while posteriorly the same measurements are respectively 

 1..3 mm. and .3.7 mm. 



Body slender and nearly round throughout, increasing in diameter to 

 somite LX, then diminishing and becoming Hnear posteriorly; rather 

 wider dorsally than ventrally and somewhat tumid above the bases of 

 the parapodia; posteriorly the great length of the parapodia gives an 

 appearance of depression. 



Head of the usual tapering, elongated form, consisting, besides the 

 basal piece, which constitutes nearly ^ of its length, of 7 distinct annu- 

 lations, diminishing in size and terminated by an 8th slightly wider one. 

 The prostomium is circular, not flattened as in G. foliacea, and the 

 furrows are continuous all around ; there is no lateral groove, but a pit 

 is present on each side at the posterior margin of the head. Only a 

 single imperfect apical tentacle, of clavate form and having a length 

 about equal to the apical ring, is present. Eyes absent. Peristomium 

 not clearly distinguished from the succeeding somites. The partial 

 protrusion of the pharynx greatly alters the appearance of the mouth, 

 but the lateral lobes or palpi, and the lips appear not to differ from 

 G. foliacea. The somites are distinct, but show no indication of sub- 

 di\'ision into rings. 



The parapodia differ in many respects from those of G. foliacea. 

 The anterior or uniramal ones are prominent and slender, have a 

 length exceeding ^ the diameter of the body, and stand out abruptly 

 from the middle of their somites. Neuropodium a compressed cylinder 

 about as deep as long, bearing at the end one postsetal and two pre- 

 setal cylindrical cirriform processes, of which the dorsal presetal is 

 slightly the longest. Neuropodial cirrus, which also arises near the 

 end, but on the ventral posterior face of the neuropodium is slightly 

 longer, and at its base nearly twice the diameter of the setal lobes, and 

 has a conical form. Notopodial cirrus separated by a narrow interval 

 from the neuropodium; it is swollen basally and, near the middle of 

 its dorsal surface, is provided with a shallow depression lined wnth 

 tall columnar cells, beyond which it bends abruptly dorsad at an angle 

 as though deformed, and terminates as a blunt cylindrical or conical 

 piece not at all foliaceous. 



The typical foot of the anterior region just described is retained 

 with little change as far forward as the 4th. The 3d parapodium has 



