1910.] NATURAL SCIENCES OF PHILADELPHIA. 391 



setae are found in the dorsal part of the bundle, being most numerous and 

 widely distributed posteriorly and fewer and more restricted anteriorly 

 where the first four or five parapodia appear to bear only smooth 

 notopodial setae in the small fascicles. Neuropodial setae are mostly 

 semicompound with an imperfect articulation differentiating the pecu- 

 liarly canaliculated or camerated appendage which tapers to a delicate 

 attenuated tip (fig. 102). All three groups are made up of similar 

 setae except that those of the posterior series are smaller, and on 

 anterior segments the joint becomes obsolete on antero-dorsal setae. 

 On XXV and following parapodia one or two delicate setae with 

 alternating ensheathing plates and delicate very acute tips (fig. 103) 

 occur in the extreme posterior dorsal part of the anterior dorsal series. 



Station 4,354, off Point Loma, vicinity of San Diego, 646-650 

 fathoms, green mud. 



This is the first true Leanira that has been reported from the North 

 Pacific. Mcintosh described several species under this generic designa- 

 tion but as has been several times pointed out these were incorrectly 

 assigned and Willey has recently proposed the genus Sthenolepis for 

 them and related species. 



Sthenolepis areolata (Mcintosh) Willey. 



Leanira areolata Mcintosh, Challenger Reports, Zoology, Vol. XII, pp. 151— 

 153, PI. XXI, fig. 3. 



This species has been reported hitherto only from the Western 

 Pacific, having been described from Japanese waters by Mcintosh 

 and the writer. . It was taken south of Yedo in 345 fathoms and in 

 Sag ami Bay in 153-749 fathoms. 



Several examples in this collection agree perfectly with Mcintosh's 

 description and with the Japanese specimens examined by me. The 

 elytra exhibit a slight tendency toward a trilobate form and have a 

 few small blunt horny papillae not mentioned by Mcintosh scattered 

 over the surface. At about XXX the marginal fringe and lateral 

 areolation of the elytra become well marked. The peculiar elongated 

 notocirrus of III is well exhibited in these specimens and is a note- 

 worthy character of the genus. All of the specimens are broken and 

 incomplete, the longest having a length of 130 mm. and 112 segments. 



Stations 4,382, south of North Coronado Island, vicinity of San 

 Diego, 642-666 fathoms, green mud; 4,398, Lat. 32° 43' 20" N., Long. 

 117° 42' 10" W., 620 fathoms, green mud, rock; 4,518, off Point Pinos 

 Light-house, 66-140 fathoms, hard sand; 4,538, same region, 795- 

 871 fathoms, hard gray sand. 

 Sthenelanella uniformis gen. et. sp. nov. PI. XXXIII, figs. 105-112. 



A slender, little depressed species very gently tapered from somite 



