700 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



compressed laterally. Integument rather thin, translucent, the surface, 

 both of the tubes and body, entirely covered by particles of sand, 

 broken shells, foraminifera, etc., which adhere firmly. When cleaned 

 the whole surface is thickly covered with prominent granule-like papillae 

 and numerous slender fibrous processes; the granules are most con- 

 spicuous on the tubes, where they usually have a rusty color. The 

 tubes are long, subequal, and their bases are separated by a space usually 

 greater than their diameters ; they are quite divergent, both of them 

 curving outward, the anal tube most abruptly. The branchial tube is 

 cylindrical, somewhat longer than the anal, equal to or exceeding the 

 diameter of the body, the orifice surrounded by six rather long and 

 slender, conical, divergent papillae. The anal tube often bends suddenly 

 outward, tapers slightly, and has a small square aperture, surrounded 

 by a circle of dull reddish brown. In contraction the tubes are not re- 

 tracted, but are usually shortened to about one-half their length. In 

 life the body, when cleaned, is pale grayish, with an almost transparent 

 integument, through which the convolutions of the dark intestine are 

 conspicuous. 



The largest specimens are about 10 mm in diameter. 



Off Martha's Vineyard, 10 fathoms, stony; Casco Bay and Bay of 

 Fundy, 10 to 20 fathoms. 



Eugyra piltjlIris Verrill. Plate XXXIII, fig. 249. (p. 509.) 



Amer. Jour. Science, vol. iii, p. 211, Plate 8, fig. 3, 1872. Molgula pilularis Verrill, 

 op. cit., vol. i ; p. 56, fig. 4, c, 1871. 



Body unattached, globular, covered with a thin layer of mud, and, 

 when the tubes are retracted, looking like a small soft ball. Integu- 

 ment of the body, when cleaned, very thin, soft, nearly transparent, 

 thickly covered with minute granules, and minutely fibrous, usually 

 concealed by the adhering particles of mud and fine sand, but this can 

 be easily removed. The tubes are naked, smooth, nearly transparent, 

 subcorneal, slender, as long as the diameter of the body, originating 

 close together, and but slightly divergent, both of them nearly straight; 

 they can be wholly retracted, and their bases are surrounded and con- 

 nected by a narrow, naked, oval or oblong band, which is usually con- 

 spicuous when the tubes are withdrawn: in partial contraction, the 

 tubes are conical, subpellucid, reticulated with white lines. The 

 branchial tube is a little shorter than the anal, the aperture surrounded 

 by six acute, conical papillae, and twelve small, dark, brownish spots. 

 Anal tube a little smaller, slightly longer, a little tapering, with a small 

 square aperture, surrounded by four small lobes and four small, reddish 

 brown eye -spots. 



In life the body, when cleaned, is transparent grayish, the dark in- 

 testine showiug through very distinctly ; tubes greenish at base. 



Diameter usually about 5 ram , seldom more than 6 mm or 8 mm . 



Off Gay Head, Martha's Vineyard, 19 fathoms, soft mud ; Casco Bay, 





