A. M Verrill — Marine Nemerteans of New England, etc. 411 

 Tetrastemma vittatum Verriii. 



American Journal of Science, vol. vii, p. 45, pi. yii, figs. 3, rt, h, 1874; Proc. Amer. 

 Assoc, for Adv. of Science for 187.-?, p. :^89, pi. ir, figs. 7, 8, 1874; Verrill, 

 Notice of Recent Addit. to Mar. Invert., Part I, in Proc. National Mus., ii, p. 

 185, 1879 (not (Ersledia vittata Hubr ) 



PtATE XXXV, FIGURES 6, 7. 



Body rather short and stout, up to 2 or 3 inches in length, soft, 

 changeahle, in extension nearly cylindrical but often a little flat- 

 tened beneath, tapering slightly anteriorly, or sometimes both ways, 

 usually obtuse at the posterior end. 



Fig. G. Tetrastemma vittatum ; n, head, dorsal view ; 6, front view, much enlarged. 



Head usually slightly narrower than the body, with a transverse 

 groove or constriction in front of the posterior eyes ; front end 

 obtuse, conical, or rounded. Ocelli four, small, rather indistinct in 

 dark colored specimens ; the anterior ones are nearer together than 

 the posterior, which are far back behind the transverse groove, 

 which extends across, beneath, and crosses the median line above. 

 Proboscis-pore terminal. 



Color of body, above, dark or light olive-green, dull yellowish 

 green, or greenish brown, or even greenish black, often with two 

 yellowish or light green dorsal stripes and sometimes with one 

 median light stripe ; beneath paler, mottled laterally. Color of 

 head, in advance of the transverse groove, various shades of olive- 

 green and dark green, white at the tip, and with six longitudinal 

 whitish or pale greenish stripes, which converge to the end ; two of 

 these stripes are dorsal, two are ventral, and one is lateral on each 

 side; the green line between the two dorsal stripes extends back on 

 the body. Internal organs show through the integument as irreg- 

 ular, short, transverse blotches or bars of lighter color along the 

 sides beneath. 



Length in extension usually about 25 to 30™'"; diameter 3 to 4™™; 

 unusually large examples have been taken as much as 75""" long, 

 gmm 1,,-oad. Described from life. 



Trans. Conn. Acad., Vol. VIII. 54 June, 1892. 



