398 A. M Verrill — 3farine JVemerteans of New England, etc. 

 Amphiporns griseus (Stimp.) Verriii. 



Polina grisea Stimp., Proclromus, iu Proc. Philad. Acad. Nat. Sci., vol. ix, p. 164, 

 1857. 



Body rather long, a little depressed, sub-cylindrical in extension, 

 pale gray in color. Head distinct, ovate, or subcordate, narrower 

 than the body, acute in front. Anterior clusters of ocelli larger, 

 elongated, partly submarginal on the antero-lateral margin of the 

 head; ocelli ten in each cluster. Posterior clusters cervical, small, 

 linear, with four ocelli in each. 



Length 0'8 inch; breadth 0-04 inch. 



In the harbor of Norfolk, Va., sublittoral, among algie in muddy 

 places. 



The above is a translation of Dr. Stimpson's Latin diagnosis. 

 The species appears to be closely allied to A. glutinosus. 



Amphiporus frontalis Yen-ill, sp. nov. 



Plate xxxiv, figures 1, la, \h, 8. 



Body large, versatile in form, rather elongated, convex above, but 

 somewhat depressed in extension, of nearly uniform breadth to near 

 the ends, which are obtuse. Head in extension usually broader than 

 the neck and separated by a slight constriction, usually longer than 

 broad, but it may shorten into short ovate or broad rounded forms; 

 front margin often emarginate, A well-marked, but shallow, ob- 

 lique, transverse, ciliated fossa at the posterior border of the head, 

 on each side, curves inward and usually somewhat forward, but 

 does not reach the middle line; in some states of contraction these 

 fossae curve backward ; underneath, the fossae run very oblicpiely 

 backward and inward, when the head is extended. Near the front 

 of the head, on each side, a short curved fossa runs inward and 

 curves forward, nearly parallel with the posterior ones, beneath 

 the head they curve inward and backward but they recede in a 

 V-shaped curve on each side of the head. Ocelli rather large and 

 conspicuous, blackish, arranged in a single irregular cluster, or 

 double row, of six to eight or more, on each side of the front and 

 near the margin of the head. Mouth close to the proboscis-pore. 



Color translucent white, or pale gray, or yellowish, with a darker 

 dorsal band ; sides of body mottled with pale pink or yellowish, 

 due to the internal organs. 



A vai'iety taken at Eastport, Me., at low water, 1868, was trans- 

 lucent pale salmon, or flesh-color, mottled laterally with purplish 

 and yellowish, due to the internal organs, while the median dorsal 



