BIGELOW: MEDUSAE AND SIPHONOPHORAE. 427 



Loose bracts, and nectophores, all in poor condition, from Stations 

 10,161, 10,169, 10,180, 10,194, 10,208, 10,209, 10,211, probably belong 

 to this species also. 



The identity of these two specimens rests on the fact that the ten- 

 tilla (Plate 8, fig. 5) a few of which are intact in each case, have a 

 single terminal filament, and no involucre, for <S. rubra is the only 

 agalmid with this type of tentillum (1911b), and on actual comparison 

 with two excellent examples of the species from Naples. 



Two young bracts, still attached to the specimen from Station 

 10,166, are of the thin, foliaceous, triangular form typical of that 

 species (Vogt, 1854; Leuckart, 1854; KoUiker, 1853); and two young 

 nectophores (specimen from Station 10,206) are higher and more 

 rounded than the corresponding organs in Agabna okeni, in this 

 agreeing with the Naples specimens of S. rubra. It is because of their 

 resemblance to the latter, that the nectophores and bracts listed above 

 are referred to S. rubra. But though they are easily separated from 

 the corresponding organs of Agabna okejii, they so closely resemble 

 Agalma elegans, and Stephanomia bijuga (1911b), both of which may 

 be expected to occur in the region traversed by the Bache, that 

 possibly one, or even both, of those species may actually be represented 

 among these loose bells. 



The material is so fragmentary, that it adds nothing to the earlier 

 accounts of this species. 



Rhizophysidae Brandt. 

 Rhizophysa filiformis (Forskal). 



Physsophora filiformis ForskM, 1775, p. 120; 1776, tab. 33, fig. f. 

 (For synonymy, see Bigelow, 1911b, p. 319). 



Station 



10,169 50-0 meters 1 fragmentary specimen 



10,188 175-0 " 1 



10,205 lOO-O " 1 " " 



These specimens are fragmentary, and very much twisted. But 

 the presence of trifid tentilla identifies them as R. filiformis rather 

 than R. eysenhardti. 



