332 PROCEEDINGS OF THE ACADEMY OF [June, 



seven segments, and is bounded by the divergent epaulettes which ex- 

 tend caudad from the peristomium and have pigmented borders. The 

 regenerating region is quite small, barely a mm. in length and about 

 one-fourth that in width, and ends in an unsegmented blunt pygidium 

 without cirri. 



Parapodia, as usual in the genus, short, thick, ventral in position, 

 lacking free neurocirri which become coalesced with the neuropodia to 

 form opaque ventral swellings; neuropodia terminating in short, thick, 

 presetal and postsetal lips. Notocirri Avith large cirrophores, often as 

 large as the neuropodia; styles unjointed, coarse and similar to the 

 tentacle, very easily detached and many missing. That of II very long, 

 about twice the lateral tentacle and reaching to about XX; that of 

 III about one-half as long; the others much shorter, the longest about 

 one-half III or about width of body. 



Acicula four (on one parapodium studied), tapered to blunt points. 

 Setse forming rather dense tufts, colorless, the shafts rather stout, 

 strongly curved, distally enlarged and near the articulation denticu- 

 lated on both faces. Appendages little longer than oblique end of 

 shaft, triangular with bidentate ends, the anterior tooth larger and 

 somewhat hooked. 



No teeth visible at end of retracted proboscis, oesophagas scarcely 

 looped; gizzard in XX-XXVIII, apparently about thirty-three 

 rings. No color. 



The single specimen comes from an unknown station. 



SPH^JRODORID^. 



Although at least five generic names have been applied to the few 

 known species of this very small family, it seems that the forms possess- 

 ing compound setae still lack proper generic designation. Indeed, if 

 the synonymies published by European authors l)e correct, all of these 

 names are based upon a single type species. As each was originally 

 proposed for a single species, there is no difficulty about fixing the types. 

 Three names were proposed in 1843: Ephesia Rathke for E. gracilis 

 Rathke (n. sp.), Sphcerodorum Oersted for S. flavum Oersted (n. sp.) 

 and Bebryce Johnston for P. peripatus Johnston (n. sp.). Ephesia 

 was previously used by Hiibner in 1816 for a genus of Lepidoptera, and 

 Bebryce is preoccupied by Bebryce Philippi, 1842. Nothing in the 

 descriptions of the types serves to differentiate them ; they all certainly 

 have simple seta? and lack spherical organs other than those directly 

 related to the parapodia. Two years later Johnston, discovering 

 the earlier use of Bebryce, substituted Poilicita, l)ut admits the prob- 



