NO. 1989. A8CIDIAN8 FROM nORTHEA8TERN PACIFIC— RITTER. 491 

 CORELLOPSIS PEDUNCULATA Hartmeyer. 



Corellopeis pedunculata Hartmeyer, 1903, p. 273, pi. 5, fig. 15; pi. 12, figs. 1-5. 



Although the single specimen at hand differs in some respects 

 from Hartmeyer's description of this species, the differences are en- 

 tirely too small to justify the making of another species on the 

 strength of the evidence at hand. The lobing of the orifices in 

 Hartmeyer's specimen was vague, so the author was unable to state 

 positively the number of lobes present, six being given with a ques- 

 tion for both orifices. The exact state of things is dubious here also, 

 but this much is clear: There are on the atrial orifice four promi- 

 nent bands on the inside of the orifice, each terminating in several 

 irregular lobes or crenulations. 



Seventeen branchial tentacles are present, of two or three sizes, 

 the largest being long and strong. 



The rudiments of internal longitudinal vessels of the branchial sac 

 are much longer in our specimen than are those figured by Hart- 

 meyer. It appears, too, that the secondary series of internal vessels 

 shown by Hartmeyer as rumiing radially and diagonally from the 

 center of each stigmatic spiral are less regular in the present speci- 

 men. 



One specunen, Albatross 2842, lat. 54° 15' N.; long. 166° 03' W., 

 72 fathoms, pebble bottom, July 23, 1888. 



CORYNASCIDIA HERDMANI, new species, 

 Plate 35, figs. 31-36. 



Superficial characters. — Strongly pedunculate, the peduncle being 

 one and one-tliird, or more, longer than the elongate body and, in its 

 thinnest part, from one-fifth to one-sixth the tliickness of the body 

 in its dorso-ventral diameter, thijmest in its middle portion and from 

 here expanding gradually but distinctly to its foot ; peduncle composed 

 mostly of testicular material of the same general character as that of the 

 body, hence transparent like the body. Body elongate (fig. 31) about 

 twice as long as tliick, quite regular, cyhndrical, though soft, tapering 

 abruptly to the peduncle, colorless and quite transparent, the rela- 

 tively small, compact, dark visceral mass occupying the postero- 

 dorsal angle showing distinctly through the external coverings. 

 Siphons, both at the anterior end, separated by the diameter of the 

 body, atrial long, tube-hke, curved backward; brancliial very short. 

 Orifices rather large, the brancliial with a wide thin hp or flange sub- 

 tending nearly its dorsal semicircumference; atrial with five broad, 

 tliin, scallop-hke lobes, with two or three irregular smaller ones in the 

 mtervals between some of the larger ones. Test rather thin except 

 on peduncle, soft and gelatinous, very transparent. Mantle very 



