416 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Amaroucium stellatum Veirill. 
Text-fig. 25; PI. 34, fig. 1. 
1871. Atnouroucinni stellatum Verrill, Amer. Journ. Sci., ser. 3, vol. 1, p. 291. 
1871. Amouroucium stellatum Verrill. Amer. Journ. Sci., ser. 3, vol. 2, p. 359. 
1872. Amouroucium stellatmn Verrill, Amer. Journ. Sci., ser. 3, vol. 3, p. 211. 
1873. Amaroechim stellatum Verrill and Smith, Report on Invertebrate Ani- 
mals of Vineyard Sound, pp. 402 (411), 419 (424), 704. 
1878. ? Amaroecium stellatum Coues and Yarrow, Proc. Acad. Nat. Sci. 
Philadelphia, p. 304. 
1879. Amoroecium stellatum Verrill and Rathbun, Proc. U. S. Nat. Mus., 
vol. 2, p. 231. 
1889. Amoroecium stellatum McDonald, Rep. U. S. Comm. Fish and Fish- 
eries for 1886, p. 858. 
1891. Amaroucium stellatum Herdman, Journ. Linn. Soc. London, Zool., 
vol. 23, p. 628 (listed under heading "unrecognizable PolycHnidae"). 
1900. Amaroecium stellatum Metcalf. Zool. Jahrbiicher, Anat., vol. 13, p. 526. 
1909. Amaroucium stellatum Hartmeyer, Bronn's Tier-reich, vol. 3, suppl., 
p. 1477 (Usted as uncertain species). 
In this species the zooids closely resemble those of A. glabrum, but 
the character of the colony is very different. 
"It forms large, smooth, irregular plates, or crest-like lobes and 
masses, which are attached by one edge to the stones and gravel. 
These plates are sometimes one to two feet long, six inches high, and 
about an inch thick, and. owing to their smooth surface and whitish 
color, look something like great slices of salt-pork, and in fact it is 
often called ' sea pork ' by the fishermen. Other specimens will be four 
or five inches high, and only one or two inches broad at the base, and 
perhaps half an inch in thickness, and the summit often divides into 
broad flat, blunt lobes; various other shapes also occur, some of them 
very irregular. The larger specimens of this species are generally of a 
pale bluish or sea-green color by reflected light when first taken from 
the water, but pale salmon or flesh-color by transmitted light. The 
zooids are much elongated and arranged in more or less regular circular 
groups over the whole surface, with a small cloacal orifice in the center 
of each circle. If kept in water, when they grow sickly the zooids will 
be forced partially or wholly out of their cavities by the contraction of 
the tissues around them — a peculiarity seen also in other species of this 
genus. These zooids have the branchial tube prominently six-lobed, 
and of a bright orange color, this color also extending over the upper 
