L001] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 307 
forming an acute angle behind, anteriorly suddenly expanding into a 
wide transverse frontal lobe, broadly rounded in front, with a slight 
emargination in the middle, the lateral angles prominent and slightly 
auriculate or recurved. Eyes four, distant, the two pairs nearly parallel. 
Proboscis small, smooth, rounded. Antenne slender, twice as long as 
the breadth of the body. The branchiz are slender and ligulate an- 
teriorly, and meet over the middle of the back; but farther back they 
gradually decrease in length, and disappear at about the anterior third. 
The upper ramus of the feet consists of a broad, thin, foliaceous upper 
ramus, rounded outwardly, connected, for most of its length, with the 
branchia, the upper end alittle prominent; and a broad cluster of set, 
consisting of a small upper fascicle of slender aciculie, scarcely as long 
as the branchia, and a comb-like group of shorter and somewhat stouter 
bent and acute sete. The lower ramus consists of a small, thin, rounded 
process, bearing a transverse row of acute bent setie, and a ventral tuft 
of longer and more slender ones. Posteriorly the slender sete in the 
dorsal and ventral tufts are considerably longer; and several stouter, 
recurved, two-hooked, uncinate sete appear in the transverse rows of 
acute set, both in the upper and lower rami. Anal segment short, 
truncate or suburceolate, somewhat bilobed; the margin of the orifice 
crenulated with small rounded lobes, and with four small conical papillz 
onthe upperside. Color olive-green or bright green, darker posteriorly ; 
branchiz bright red; antenne light green, with a row of black specks, 
Length up to 100™"; breadth, 3™™. 
Great Egg Harbor; New Haven; Watch Hill; Wood’s Hole; burrow- 
ing in sand, at low-water. 
SCOLECOLEPIS TENUIS Verrill, sp. nov. (p. 345.) 
Body very long and slender, depressed, especially anteriorly, gradually 
tapering posteriorly. Head short and broad, slightly three-lobed in 
front, the central lobe broadly rounded, the lateral ones also rounded, 
somewhat smaller. Antennz long and slender. The branchi are small, 
ligulate, and exist only on the anterior segments. The set of the dor- 
sal fascicle are long and slender; but those of the first three segments 
are longer than the others, forming large fan-shaped fascicles directed 
upward and forward; those of the first segment longest, about twice as 
long as the breadth of the head. Farther back the sets of the upper 
ramus become shorter, the upper ones slender, capillary, the lower ones 
stouter, somewhat bent, mostly acute, some uncinate. Those of the 
lower ramus are shorter, setiform, forming large fascicles anteriorly. 
Farther back the upper ones are partly stouter, somewhat bent, and 
acute, and partly uncinate, while a small ventral fascicle of slender ones 
stillremains. Posteriorly the setigerous lobes of the feet become very 
smail. Color light green; branchie red, tinged with green; antenne 
whitish, with a red central line. 
Length, 80"; breadth, 1.25™™. 
Great Egg Harbor, New Jersey; burrowing in sand, at low-water. 
