INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 705 



ated. Color of the masses usually light orange-reel, 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 ; 

 zooids 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 cloaca! cham- 

 ber or "atrium" contained three or four bright purple tadpole-shaped 

 larvas. 



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 (Amouroueium). 



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 

 forma 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 papillae. Color of the masses pale yellowish or 

 grayish ; stomach dull orange-yellow ; ovaries yellowish white. 



The larger specimens of this species are 15 ,mn to 25 mra in diameter ; 

 the largest zooids are 3 ram to 4 mm long, by .75 ,um to 1.25 mm in diameter; 

 but many are much smaller. 



Martha's Vineyard to Gulf of Saint Lawrence. Off Buzzard's Bay, 

 25 fathoms, gravel ; south of G-ay Head, 10 fathoms, stony ; Casco Bay, 

 8 to 40 fathoms ; Eastport Harbor and Bay of Fundy, low- water to SO 

 fathoms. 



Leptoclinum albidum Verrill. (p. 403.) 



American Journal of Science, ser. iii, vol. i, p. 446, 1872. 



Colonies incrusting stones, dead shells, ascidians, etc., formiug broad, 

 thin, irregular, coriaceous crusts, with an uneven surface, filled with 

 miuute, white, spherical, calcareous grains or corpuscles, which, under 

 S. Mis 45 



