426 A. E. Verrill — Maruie Neniertecms of New En.</lajid, etc. 



body, but very changeable. Ocelli absent. Lateral (cephalic) fosste 

 long and deep. Mouth situated far back from the anterior end. Color 

 usually whitish or pale ocher-yellow, usually becoming reddish to- 

 ward the head, and with a rather indistinct pale dorsal line ; an- 

 teriorly there are usually two pale doreal sj)ots in front of which the 

 head is yellowish. 



Length, in extension, 100"""; breadth 0-5 to 0-75""". 



Off Cape Ann, Mass., 45 fathoms, mud, 1878. 



Lineus dubius Ven-iii. 



Liaeus dubius Verrill, Notice of Keeeat Addit. to Mar. Invert., Part I, in Proc. 

 National Mus., ii, p, 18(3, IS79. 



PLATE XXXVII, FIGURES 4, 4a. 



Body very slender in extension, and attenuated ])osteriorly. Head 

 elongated, narrow, usually pointed ; lateral slits of moderate length ; 

 ocelli lohite, inconspicuous, forming a lateral row of about twelve, 

 extending back on each side of the head beyond the posterior ends 

 of the lateral fossae, usually the four anterior ones on each side are 

 separated by a little space from those that follow, but all are nearly 

 in a simjile row. Color, above, light green to dark olive-green. 



Length of tlie largest specimens observed, 50 to 75""". 



Gloucester, Mass., under stones, between tides, 1878. 



Linens bicolor Verrill, si), uov. 



PLATE XXXVII, FIGURES 8, 8a, 8^. 



Body rather small, in extension elongated, thickest and somewhat 

 depressed in the middle, tajjering to both ends, and decidedly at- 

 tenuated posteriorly ; sides rounded. Head elongated, flattened, 

 rather wider than the neck, in usual extension. Lateral olfactory 

 slits long and deep, Avith thin margins. Mouth usually elliptical, 

 situated behind the ends of the olfactory slits. The ocelli are ar- 

 ranged in a simple row of about 4 to 7 on each side of the head, the 

 front pair largest. Color, above, along each side of back a broad 

 stripe of olive-green, yellowish green, or brownish green, separated 

 by a median dorsal, well defined, broad stripe of pale yellow or 

 yellowish white, usually becoming clear white on the head, where it 

 expands and blends with a white frontal area in advance of the eyes; 

 the margins of head are also white. Lower surface })ale greenish or 

 yellowish white. 



Length in extension, 35 to 45"""; diameter, 1 to 1.5""". Described 

 from life. 



