702 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



Cynthia echinata Stimpson. (p. 495.) 



Invert, of Grand Menan, p. 20, 1854 ; Binney, op. cit., p. 18, Plate 23, fig. 326 ; 

 Verrill, Amer. Jour. Science, vol. i, p. 96, 1871; vol. iii, p. 213, 1872. Cynthia 

 hirsuta (young) Agassiz, op. cit., 1850 ; Binney, in Gould, Invert., ed. ii, p. 20, 

 Plate 24, fig. 336. Ascidia echinata Linn6, Syst. Nat., ed. xii, p. 1087, 1767. 

 Ascidia echinata Fabr., Fauna Grcenl., p. 331, 1780 ; Rathke, Zoologica Danica, 

 vol. iv, p. 10, Plate 130, fig. i, 1806 ; Moller, Index Mollusc. Grcenl., in Kroyer's 

 Nat. Tidsskrift, vol. iv, p. 95. 



Martha's Vineyard to Greenland, Iceland, and northern coasts of 

 Europe. Off Martha's Vineyard, 10 fathoms, stony, rare; common in 

 Casco Bay and Bay of Fundy, low-water to 109 fathoms, attached to 

 stones, shells, and other ascidians. Saint George's Bank (S. I. Smith). 

 Banks of Newfoundland (T. M. Coffin). Labrador (Packard). 



Boltenia. Species undetermined. 



Boltenia reniformis Dekay, Nat. Hist. New York, Mollusca, p. 260, Plate 34, fig. 324 

 (non Macleay). 



New York Harbor (t. Dekay.) 



The description and figure of the single poor specimen seen by Dekay 

 are insufficient for its determination. I have not met with the genus 

 south of Cape Cod, and the locality given may possibly be incorrect. 

 Perophora viridis Verrill. (p. 388.) 



American Jour. Science, ser. iii, vol. ii, p. 359, 1871. 



Colonies composed of numerous nearly sessile individuals, which are 

 small, about 2.5 mm to 3 mm high, conuected by slender stolons, and 

 thickly covering the surfaces over which they creep. Test compressed, 

 seen from the side, scarcely higher than broad, oval, elliptical, or sub- 

 circular, often one-sided or distorted, with a short pedicle, or subsessile 

 at base. Branchial orifice large, terminal ; anal lateral or subterminal, 

 both a little prominent, with about 16 angular lobes, alternately larger 

 and smaller. Test transparent; mantle beautifully reticulated with 

 bright yellowish green ; intestine yellow. 



Vineyard Sound, 2 to 12 fathoms, on algae and ascidians, common; 

 Little Harbor, Wood's Hole, on piles of wharves, at and below low- 

 water mark, very abundant. 

 Botrylltjs Gouldii Verrill. Plate XXXIII, figs. 252, 253. (p. 375.) 



Amer. Jour. Science, ser. iii, vol. i, figs. 14, 19, 1871. BotryUus stellatus* Gould, 

 Rep. on Inv. of Mass., 1st ed., p. 320,1841 (non Pallas). BotryUus Schlosseri Bin- 

 ney, in Gould, Inv. Mass., ed. ii, p. 3, Plate 23, fig. 319, 1870 (non Pallas) ; Dall, 

 Proc. Bost. Soc. Nat. Hist., xiii, p. 255,1870. 



This species commonly forms thick, fleshy, translucent incrustations 

 on sea-weeds and zoophytes, the form which it assumes depeuding upon 

 the shape of the object. The masses are often several inches in length 

 and half an inch or more in width. The animals are short oval, as seen 

 at the surface, and form circular or elliptical groups, of from five to six- 

 teen or more, surrounding circular or elliptical cloacal orifices. The 

 " marginal tubes" or buds are numerous in all parts of the common 



