346 THE ANNELIDA POLYCHAETA. 



phase seems comparatively slight. Hence it is felt necessary to separate the 

 new form as the representative of a distinct genus. The character of the arma- 

 ture of the normal proboscis must probably remain uncertain until the atokous 

 form is discovered, as the epitokous forms commonly lose the jaws, while the 

 proboscis itself undergoes reduction.^ 



Telake epipolasis, sp. nov.^ 



Plate 63, fig. 4-8; Plate 64, fig. 1. 



Epitokous Female. 



The type-specimen has the body-wall colorless and translucent, the viscera 

 showing through giving a shghtly brownish tinge. 



The body is cylindrical; it is widest near the middle of the type-piece, which 

 would be in front of the middle of a complete specimen, narrowing both ways, 

 the prostomium forming a slenderly pointed anterior extremity. The pos- 

 terior region of the type is broken off. The type as at present is 23 mm. long, 

 with a maximum width, exclusive of parapodia, of 1.7 mm. The incomplete 

 type consists of sixty -seven somites. 



The prostomium continues smoothly the outline of the peristomium and 

 narrows distad to an acute tip, as usual, having a slenderly conical form. It 

 is fused with the peristomium. The prostomium is three times as long as wide 

 at the base. The rings of the prostomium are too vaguely indicated to be counted 

 with any degree of certainty. The type at present shows on the dorsal surface 

 of the prostomium a median longitudinal furrow which reaches neither anterior 

 nor posterior end. On each side there is also a longitudinal furrow extending 

 caudad as far as the rather conspicuous nuchal organ. A ventral sulcus is rather 

 vague and narrow. The tentacles have the usual position and relations at the 

 tip of the prostomium. The dorsal are decidedly longer and stouter than 

 the ventral, the latter being clearly shorter than the diameter of the end of the 

 prostomium. There are no eyes evident. A palpal lobe, low and but shghtly 

 differentiated and immobile, lies on each side of the mouth. 



The peristomium is fused to the prostomium, and ventrally apparently also 

 with the succeeding somite to form a prominent broad Up, which is crossed radi- 

 ally by numerous fine sulci. 



The metastomial somites are clearly defined, cylindrical, smooth. Each is 



' CJ. Arwidsson, Bergens mus. aarbog, 1908, no. 11, p. 7. 

 2 €7riir6\oo-is, lying on or rising to the surface. 



