1911.] NATURAL SCIENCES OF PHILADELPHIA. 289 



Other specimens are slightly larger. Several specimens are marked 

 with coarse pigment spots arranged in transverse bands. 



Stations 4,325, off Point La Jolla, vicinity of San Diego, 191-292 

 fathoms, green mud and fine sand; 4,405, off San Clemen te Island, 

 654-704 fathoms, green mud; 4,406, off Santa Catalina Island, 650 

 fathoms, green mud ; 4,452, Monterey Bay, off Point Pinos Lighthouse, 

 49-50 fathoms, green mud and fine sand; 4,457, same locality, 40-46 

 fathoms, dark green mud; 4,464, same locality, 36-51 fathoms, soft 

 dark green mud; 4,467, Monterey Bay, off Santa Cruz Lighthouse, 

 51-54 fathoms, soft dark green mud. 



Lumbrineris inflata sp. nov. Pis. XIX, XX, figs. 128-134. 



A small and apparently an immature form. At least none of the 

 specimens contains genital products. It presents, however, so many 

 peculiar features that it is probably not the young of any species already 

 described from the Pacific. The type is 68 mm. long, with a maximum 

 width in the proboscis region of about 1 mm. Segments 134. The 

 largest specimen is an anterior end' 1.5 mm. in diameter. Form linear, 

 tapering gently to the caudal end, terete. 



Prostomium thick and scarcely depressed, length equal to or slightly 

 exceeding width, subgloboid or short ellipsoid, sides and front equally 

 rounded, dorsum strongly convex, venter with a broad, shallow, 

 median groove. Eyes totally wanting. Nuchal isthmus and pit 

 narrow, the peristomium scarcely emarginated. Palps simple cushions, 

 wider than long. 



Peristomium distinctly longer than II, which is also apodous, the 

 two together equalling or slightly exceeding the prostomium in length. 

 Dorsally they are sharply differentiated by a distinct furrow and the 

 peristomium is slightly emarginated at the nuchal pit; ventrally they 

 are united to form the furrowed lip, II being produced forward and 

 cutting into I. Succeeding metastomial segments remarkably well- 

 differentiated by deep furrows and more or less biannulate or marked 

 with a narrow, raised, whitish line; anterior segments about three 

 times as wide as long, posterior nearly as long as wide. Pygidium a 

 minute, slightly widened ring bearing four short, equal, symmetrical, 

 conical cirri. 



Parapodia (PI. XIX, figs. 128, 129) arise nearer the ventral than 

 the dorsal surface, especially toward the ends of the body, and are of 

 simple, uniform structure throughout. Neuropodia slightly thickened 

 distally, divided at the end into a very short presetal lobe and a longer, 

 stiffly outstanding postsetal lobe about equalling the body of the 



