464 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.45. 



the scattered brownish warts above mentioned. Minute green-black 

 sand grains evenly sprinkled over the entire surface. Greatest length 

 of body, 6.5 cm.; diameter, 4 cm.; peduncle, 11 cm. long, about 3 

 mm. thick in the thinnest part, expanded to about 4 mm. at the 

 end remote from the body. No holdfast present, indicating that a 

 portion has been broken off. Test halfway between leathery and 

 gelatinous in consistency, hardly more than 1 mm. thick, except in 

 the mounds on the surface mentioned above; almost chalk white 

 on the inner surface, the bro^vn warts showing through in color, and 

 each marked by a slight prominence. Mantle thin, semitransparent, 

 somewhat resembling thin, crumpled parchment paper; muscles 

 sparse, the encircling fibers disposed in very definite bands, these 

 separated by wide regular intervals, and of nearly equal abundance 

 throughout; longitudinal fibers present but disposed in less well- 

 defined bundles; a few bundles of the type of the encircling bundles 

 running diagonally. Little or no concentration of muscle fibers about 

 the orifices. 



Respiratory system. — At least 33 tentacles varjong in size from 

 almost minute with few small branches to large with many branches 

 bearing numerous secondary branches (fig. 15). Branchial mem- 

 brane with five prominent folds on each side, the scheme of longitu- 

 dinal vessels as follows: 



Endostylejj_^_2_^^_l_^^_l_^_l_;^_l 



As usual in Culeolus no true stigmata present, the membrane consist- 

 ing entirely of the wide-meshed network of longitudinal and trans- 

 verse vessels; transverse vessels of two or three sizes alternating 

 more or less regularly, some of them, particularly the smaller ones, 

 frequently interrupted. A dorsal languet for each transverse vessel. 

 No spicules in any of the tissues of the branchial apparatus. 



Alimentary system. — (In too advanced a state of disintegration for 

 full characterization.) On left side, forming a wide evenly curved 

 U; stomach apparently but little greater in diameter than intestine; 

 bearing a number of lobes (liver ?) ; rim of anus lobulated all around. 



Reproductive system. — On both sides, those of the left within the 

 intestinal loop (fig. 17), both ovary and testes clinging to the mantle. 

 Ovaries elongated, sausage-shaped, one on each side of body (figs. 

 16, 17), surrounded by the testis masses, but easUy separating from 

 these and from the mantle; testes, a single series of eight large and 

 several small widely separated masses on the left, and three series 

 on the right, one with eight masses, one with seven masses, and one 

 with six. The irregularly lobulated masses of each side all connected 

 with a sperm duct closely adherent to the mantle. 



The relation of the parts of the genital system to one another in 

 this species is obscure. The statements about the male and female 



