1910.] NATURAL SCIENCES OF PHILADELPHIA. 387 



• Peitidice aspera Johnson. 



Peisidice aspera Jolinson, Proc. Cal. Acad. Sci., 3d Series, Zoology, ^'ol. I, 

 pp. 184, 185, figs. 56-59, 63. 



One specimen has as many as twenty pairs of elytra. The setae 

 of the first setigerous parapodium (II) have very much longer appen- 

 dages than the others. 



Johnson's specimens were taken in Monterey Bay and the writer 

 has recorded the species from Alaska. Now reported only from, — 



Station 4,460, off Point Pinos Light, 55-167 fathoms, green mud and 

 gravel. 



' Leanira alba sp. nov. PI. XXXIII, figs, 99-104. 



The type and only known specimen is an excellently preserved 

 anterior end of 52 fully-developed segments and a caudal regeneration 

 cone of 5 + segments. Length 58 nun.; greatest width (at XXX), 

 of body 3 mm., between tips of parapodia 6 mm., between tips of 

 setae 7.5 mm. ; depth at XXX 3.5 mm. 



Prostomium (PI. XXXIII, fig. 99) about three-fourths as long as wide, 

 foreshortened pentagonal in 'shape, the posterior or basal side slightly 

 concave, postero-lateral pair of sides nearly straight, antero-lateral 

 slightly convex, meeting in a blunt, notched apex. No distinct eyes 

 but an obscure deep-seated pigment spot on each side of base of median 

 ceratophore. Median tentacle arising in a shallow depression on 

 dorsum immediately behind anterior border; ceratophore short but 

 distinct with trace of aliform lamellae; stjde short, thick and stiff, its 

 length about equal to width of prostomium, stout fusiform at base, 

 tapering to a short thick filament like the handle of an Indian clul). 

 Lateral tentacles coalesced at the base with the dorso-medial face of 

 the peristomial parapodia but more largely free than in Stenelais 

 tertiaglabra, similar to median tentacular style and reaching beyond 

 its end, basal two-thirds fusiform, distal third a thick filament, scarcely 

 covered by buccal or peristomial lamellae. Palpi flagelliform, exces- 

 sively slender and elongated, about thirteen or fourteen times as long 

 as the prostomium, very regularly tapered to subacute tips and 

 very smooth. The palpi are crowded away from the pewstomium by 

 the inserted peristomial parapodia, with the ventral side of the base 

 of which they are united for a short distance. At the base they pass 

 through a loose sleeve formed by the partial union of two foliaceous 

 curved lamellae (fig. 99) which are united with the ventral face of the 

 parapodium and end in free truncate lobes bending round the pali;)us, 

 one on its medial ventral side being twice as long as the parapodium, 

 the other on the lateral side reaching scarcely beyond its end. A 

 low smooth facial ridge runs from the prostomium to the mouth. 



