[705] INVERTEBRATE ANIMALS OF VINEYARD SOI'M), KTC. Ill 



sited. Color of the masses usually light orange-red, varying to vHIo\vi>h 

 and pale flesh-color; the branchial orifices with six radial in- \\lntr 

 lines. Anal orifices often surrounded by a pale or whitish hnnlci : 

 /ooids generally orange-yellow ; the orifices and tubes \\itli upper 

 of the man tie bright orange, or lemon-yellow; branchial sac usually li 

 color or pale yellow, sometimes bright orange; stomach with In 

 orange-red longitudinal glandular ribs ; intestine light orange; mam..- 

 with minute opaque white specks. In some specimens the cloacal cham- 

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

 larvae. 



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 (Amouroiicium). 



Masses sessile, hemispherical or sub-globular, usually attached by a 

 large base. Surface generally evenly rounded, sometimes irregular in 

 large specimens, smootbish, 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 papillae. Color of the masses pale yellowish or 

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



The larger specimens of this species are 15 nim to 25 m in diameter ; 

 the largest zooids are 3 mm to 4 mm long, by .75 mm to 1.2j mm in diametei ; 

 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 ; CascoBay, 

 8 to 40 fathoms ; Eastport Harbor and Bay of Fuudy, low- water to 80 

 fathoms. 



LEPTOCLINUM ALBIDUM Verrill. (p. 403.) 



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



Colonies iiicrusting stones, dead shells, ascidians, etc., forming broad, 

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

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

 28 V 



