[705] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC, 411 
ated. Color of the masses usually light orange-red, varying to yellowish 
and pale flesh-color; the branchial orifices with six radiating white 
lines. Anal orifices often surrounded by a pale or whitish border ; 
zovids generally orange-yellow ; the orifices and tubes with upper part 
of the mantle bright orange, or lemon-yellow ; branchial sac usually flesh- 
color or pale yellow, sometimes bright orange; stomach with bright 
orange-red longitudinal glandular ribs; intestine light orange; mantle 
with minute opaque white specks. In some specimens the cloacal cham- 
ber or “atrium” contained three or four bright purple tadpole-shaped 
larvee. 
Vineyard Sound, 4 to 12 fathoms, frequent ; Wood’s Hole, on piles of 
wharf; off Stonington, Connecticut, 4-5 fathoms. 
AMARCECIUM PALLIDUM Verrill. (p. 496.) 
American Journal of Science, ser. iii, vol. i, p. 289, 1871 (Amouroucium). 
Masses sessile, hemispherical or sub-globular, usually attached by a 
large base. Surface generally evenly rounded, sometimes irregular in 
large specimens, smoothish, but thinly covered with minute, firmly ad- 
herent particles of fine sand, which are imbedded in the surface of the 
common tissue and scattered throughout its substance. The cloacal 
openings are few in number and irregularly placed, except in small 
specimens, which usually have but one large central opening. The ani- 
mals are much smaller and more numerous than in the preceding species, 
often forming somewhat circular groups of six or eight individuals 
around the cloacal openings; outside of the circular groups they are 
usually irregularly scattered, but sometimes form linear series of eight 
or ten, and in young specimens with but one central opening they often 
form a larger outer circle, which is near the margin, more or less irregu- 
lar, and composed of numerous individuals. The post-abdomen, in all 
the numerous examples examined, was small, thick, obtuse, and decid- 
edly shorter than the abdomen and thorax taken together ; it often ter- 
minates in two slender papille. Color of the masses pale yellowish or 
grayish ; stomach dull orange-yellow ; ovaries yellowish white. 
The larger specimens of this species are 15™" to 25" in diameter ; 
the largest zodids are 3™" to 4"™" long, by .75™™" to 1.25™ in diameter; 
but many are much smaller. 
Martha’s Vineyard to Gulf of Saint Lawrence. Off Buzzard’s Bay, 
25 fathoms, gravel; south of Gay Head, 10 fathoms, stony; Casco Bay, 
8 to 40 fathoms; Kastport Harbor and Bay of Fundy, low-water to 80 
fathoms. 
LEPTOCLINUM ALBIDUM Verrill. (p. 403.) 
American Journal of Science, ser. ili, vol. i, p. 446, 1872. 
Colonies incrusting stones, dead shells, ascidians, ete., forming broad, 
thin, irregular, coriaceous crusts, with an uneven surface, filled with 
minute, white, spherical, calcareous grains or corpuscles, which, under 
28 V 
