W. G. Van Name — Bermuda Ascidians. 393 



tlie reefs, attached to stones and corals. It is nowhere very abund- 

 ant, nor did I ever find many individuals growing together or near 

 together. Among the places where it was obtained were Coney and 

 Long Bird Islands, Somerset Island, Harrington Sound, and Water- 

 loo, Castle Harbor. One specimen was obtained at Hungry Bay. 



Genus Halocynthia Verrill, 1879. (Cynthia Savigny, 1816.) 



Body sessile or verj' nearly so, sometimes incrusted with sand. 

 Both apertures 4-lobed. 



Test coriaceous, rarely cartilaginous, no S])icules. 



Branchial sac with G or more longitudinal folds on each side. Ten- 

 tacles compound. Dorsal lamina a continuous but sometimes toothed 

 membrane, or it may be provided with a series of languets. 



Intestine on left side forming a rather wide loop. 



Reproductive organs developed on both sides. 



Halocynthia rubrilabia Verrill. 



Halocynthia rubrilabia Verrill, Additions to the Tunicata and Molluscoidea 

 of tlie Bermudas, Trans. Conn. Acad. Sei., vol. x, p. 589, fig. 7, 1900. 



Plate LVI. Figure 83. Plate LVII. Figures 86 and 90. Plate LXII. 

 Figure 133. Plate LXIV. Figures 150 and 152. 



Body swollen, oblong or ovate, usually longer than high, attached 

 by the entire ventral surface or by a larger or smaller area near the 

 posterior end which ma}' be produced into a rudimentary peduncle. 

 Siphons of variable length, widely separated, the branchial generally 

 longer than the atrial. 



Size 35 to 50"'° long, 25 to 30"^"^ high, 20 to 25"™ wide. 



Test thick and firm (in many specimens remarkably so), deeply 

 and irregularly wrinkled, in large specimens often so covered with 

 extraneous matter that its reddish color shows only faintly. Aper- 

 tures similar, 4-lobed, the test about them roughly nodulose or warty. 



Mantle very muscular, especially on the right side; the muscle 

 bands, of v/hich the longitudinal are the most conspicuous, form a 

 rather irregular, close, opaque network. Many oblique as well as 

 transverse bands occur also. The mantle is yellow with a reddish 

 tinge, usually becoming bright red on the siphons. 



Tentacles all siraplj' pinnate, about 20 in number and of various 

 sizes; the larger ones number about a dozen and are thick, tapering to 

 a point and provided with a row of simple pinna? along each side. 

 Dorsal tubercle U-shaped, with more or less spirally coiled horns, 

 which raav be both incurved or both curved to the riHit or left. 



