MARINE INVERTEBRATA OF GRAND MAN AN. 19 



f 



L. RUBENS, St., n. s., Fig. 11. The cells of this species, as will be seen from the 

 figure, resemble those of Flustra more than Lepralia, being in straight parallel 

 series, elongated, with small truncate apertures. Color bright vermilion. It is a 

 common species, found in radiated patches encrusting nullipores, etc., in four or 

 five fathoms. 



CELLULARIA TERNATA (?), Johnst., Brit. Zooph. Found in twenty f., shelly bot- 

 tom, in the Hake Bay. 



GEMELLARIA DUMOSA, St., n. s. Polypidom white, thick, and bushy, with the 

 branches but slightly diverging. Cells opposite, in pairs, joining each other by the 

 broad dorsal surface, flattened, elongated, broadest at the aperture, which is ovate 

 or sub-panduriform, narrowest behind, and without spines. Each pinna has a 

 chainlike appearance from the constriction at the base of each pair of cells, where 

 it joins the top of the preceding pair. Some of the bunches taken were four inches 

 high. They were all more or less obscured by extraneous substances. It was 

 dredged in ten f., off Cheney's Head, on a coarse, sandy, and somewhat weedy 

 bottom. 



FLUSTRA TRUNCATA, Lin. Common in four , on nullipore bottoms, among the 

 smaller islands. 



F. SOLIDA, St., n. s., Fig. 12. Polypidom broad, very thick and solid, of a bright 

 yellowish or cream color. Cells very long and narrow, with broadly truncated 

 apertures. It grows to a height of three or four inches, with the branches three- 

 eighths of an inch broad. Dredged in twenty-five f., off the northern point of 

 Duck Island. 



ACEPHALA. 







TUNIC AT A. 



Of the compound ascidians only two were observed, and these, for want of proper 

 opportunity, were not sufficiently investigated for specific designation. One was 

 in the form of small glistening pellucid masses, variously lobed, with the aspect of 

 an Aplidium. This was common among the nullipores in shallow water. The 

 other was met with in only one instance, in deep water, near Duck Island. It was 

 a mass about two inches in length, encrusting a tuft of Flustra, of a bright green 

 color, and very beautiful. It approximated in character the genus Botrylloides. 



The simple ascidians were numerous and interesting. In addition to those cata- 

 logued below, I should mention that in one instance I met with what appeared to 

 be a Oiavellina, but so mangled by rough usage in the dredge as to be further un- 

 distinguishable. 



ASCIDIA CALLOSA, St., Bost. Proc., iv. 228. Very abundant on shelly bottoms, 

 affording attachment to many species of zoophytes. 



