VAN NAME: COMPOUND ASCIDIANS. 
353 
cles nuinber sixteen, the rows of stigmata about nine (ten in Professor 
Verrill's figure), the internal longitudinal vessels three on each side. 
The latter are separated by about four stigmata. Each side of the 
endostyle there are five or six stigmata before the third internal longi- 
tudinal vessel is reached, and each side of the median dorsal yessel six 
or sometimes seven stigmata. 
This is a very abundant species at many points along the coast of 
southern New England, and probably further south, though Professor 
\'errill gives no locality south of Brooklyn, N. Y. This is doubtless 
the Botryllus recorded by Davenport (1898) from Cold Spring Harbor, 
Text-fig. 1.— Botrijllus schlosseri (P-dlhis). Zooid. X 45. 
Long Island. It extends along the Massachusetts coast north of Cape 
Cod at least to Salem, being abundant at Boston and Charlestown, 
^Massachusetts, as well as at Provincetown on the extremity of Cape 
Cod. • 
It is strictly a shallow-water species and grows in a great variety of 
situations, but especially on eel-grass (Zostera), on floating timber, 
and on the bottom of boats. The most luxuriant growth of this 
species that the writer has ever seen was removed from the bottom of a 
launch kept at the Thimble Islands in Long Island Sound, November 
L5, 1909. It formed coherent patches up to 20 cm. across, which were 
produced into dependent lobes often several centimeters long, where 
the stem of an alga or other growth was present to form a basis for 
such an extension of the colony. These large patches were, however, 
not single colonies, but were formed by the more or less complete 
growing together of a number of originally distinct colonies. In 
