VAN NAME: SIMPLE ASCIDIANS. 
485 
1909. Caesira pannosa Hartmeyer, Bronn's Tier-reich, vol. 3, suppl., p. 1324. 
1912. Caesira pannosa Hartmeyer, Sitzungsber. Ges. Naturforsch. Freunde, 
1912, no. 1, p. 17. 
Verrill's description of this species deals exclusively with the external 
appearance and is here quoted in full : 
"Body subglobular, or a little elongated, somewhat compressed 
laterally, entirely covered, except the ends of the tubes, with a firm 
and thick covering, composed of fragments of shells, echini, zoo- 
Text-fig. 9. — Caesira pannosa (Verrill). X 3. 
phytes, worm-tubes, foraminifera, grains of sand, pieces of sea-weed, 
and other debris. The surface of the integument, when the foreign 
matter is removed, is densely covered with small granule-like papillae, 
which give rise to very abundant, long, fine fibrous processes, by 
which the foreign matters are entangled; the basal portion of the 
tubes is covered with similar processes, though less numerous, which 
decrease toward the end, leaving the terminal portion nearly smooth. 
The tubes, which arise close together, are short conical, a little di- 
vergent. The anal tube is a little longer than the branchial, swollen 
at base, tapering and rounded at the end, which has a very small 
square aperture. The branchial tube is about the same in size, but 
a little shorter, subcylindrical, scarcely tapering, with six, small, 
prominent, acute lobes or papillae; alternating with these are six 
smaller ones. In contraction the tubes can be wholly withdrawn, 
and then the body looks like a more or less irregular ball of dirt. 
"In life the color of the clean integument is a dull, dark, grayish 
green; the tubes lighter, or dull olive-green. 
" A large specimen, when expanded, was 1 inch in length; .75 broad; 
.50 thick." 
In the alcoholic specimens examined by the writer the color of the 
