A. K Verrill — Marine Nemerteans of.N'ew Ewfland^ etc. 399 



region was greenish, apparently due to the contents of the intestine. 

 Ocelli about 10 in each cluster. 



Length, in extension, 100"""; diameter 3'""". 



Length 25 to 125"'"^; breadth about 3 to 5"'"\ An individual 5 

 inches long can contract to less than 2 inches. 



Eastport, Maine, low water, 1868 and 1870. 



Amphiporus meSOSOrUS Verrill, sp. nov. 



Plate xxxiv, figure 9. 



Body not much elongated, rather thick, well-rounded. Head of 

 the same breadth as the neck, obtuse in front. Posterior transverse 

 fossje rather shallow and indistinct. Ocelli numerous, forming a 

 large, irregular, somewhat triangular cluster on each side of the 

 middle of the head, the apex of the groups pointing backward 

 toward the ganglions. In some cases these clusters seem to consist 

 of two rather roundish cerebral groups, which blend with two short, 

 triangular lateral groups. 



Color above, bright red; beneath, liesh-color. Length 50"""; 

 breadth 3""". 



Massachusetts Bay, off Salem, Aug. 13, 1877, station 30 (three 

 specimens) 



Amphiporus cruentatUS Verrill, Proc. U. S. Nat. Mus., vol. ii, p. 184, 



1879. 



Plate xxxiii, figures 7, 8, 8a; Plate xxxv, figure 3; Plate xxxix, figure 9. 



A species peculiarly characterized by having red blood, so that 

 the longitudinal vessels appear distinctly red through the translu- 

 cent integument. Body soft, flaccid, versatile, in full extension 

 slender, tapering to both ends, but capable of becoming thicker and 

 obtuse or even swollen posteriori}'-, and of contracting into a short 

 stout form. Head not very distinct, scarcely broader than the 

 neck, snout strongly ciliated. Ocelli about 8 to 12 on each side 

 of the head, in a simple, interrupted, longitudinal, sublateral row, 

 the most anterior ocellus distinctly the largest. Two slight trans- 

 verse grooves on each side of the head, apparently not extending 

 across the dorsal side, the anterior ones curving forward in front 

 of, and the posterior ones behind the ganglia. Proboscis long, 

 densely covered with elongated, conical papilla?, ; &. simple central 

 stylet, with two small, pin-shaped lateral ones on each side (PI. xxxix, 

 fig. 9). 



