T)i 



56 A. E. Verrill on Ascidians from New England. 



Molgula retortiformis Yerrill, sp. nov. Figure 3. 

 Body subglobular or more or less oval, generally higher than 

 broad and a little compressed laterally, destitute of a distinct 

 disk, though generally adhering. 

 "* ""' ., ' thick and firm, 



but ti 

 gethe: 



zoophytes, ascidians, fragments of 

 shells, etc., which form a coarse, 

 ugh, and rather loosely adherent 

 ating, but this is usually incomplete 

 • thin and the surface more or less 

 exposed. When cleaned the surface 

 is roughened by small, scattered, 

 granule-like papillas, and irregular 

 rough processes, while in large specimens it is more or less 

 rudely wrinkled. The large tubes arise from the upper part, a 

 short distance apart, and are widely divergent and very_ unequal 

 The anal tube is much the longest, usually equalling in length 

 the diameter of the body, very large and swollen at the base, 

 curving outward and tapering to the end, which is blunt, witli 

 a small square aperture, its surface is often roughened with 

 irregular processes, and in partial contraction is often sulcated. 

 The branchial tube is nsually about one-fourth as long, much 

 smaller at base, curved outward, the aperture surrounded by 

 six, short, conical, acute papillse or tentacular lobes, its surface 

 below often rough with irregular verrucse. In contraction the 

 tubes form large, low and rough verrucas, or may be wholly 

 retracted and invaginated, together with a portion of the integu- 

 ment of the body around their bases. 



When living the color is uniform light olive, or grayish green. 



The larger specimens are often 1-50 inches in diameter; with 



the anal tube nearly 2 inches long ; the branchial about -50. In 



the collection there are specimens of all sizes from this down to 



less than -25 of an inch in diameter. 



The young have essentially the same characters as the adults, 

 but are smoother. 



Eastport Harbor, South Bay, etc., from extreme low- water of 

 spring tides to 50 fathoms, on rocky and shelly bottoms, adher- 

 ing loosely by the sides, to other ascidians, zoophytes, shells, 

 etc., not abundant, though often met with, — Expeditions of 

 1864, '68, and 70 ; off Head Harbor, 80 to 120 fathoms,— 

 Exp. 1870. 



Molgula liitoralis Verrill, sp. nov. Figure 4, a. 



Body transversely oblong-oval, somewhat flattened laterally, 



and attached obUquely by a part of one side (usually the right) 



