LEPIDONOTUS NESOPHILUS. 77 



formed ones of smaller size; over the light area along the anterior and ectal 

 border there are numerous tubercles of mostly very small and minute size. 

 On scales farther caudad the surface becomes almost wholly smooth, the large 

 tubercles being wholly absent and a few very small ones with more numerous 

 minute points confined mostly to the ectocaudal border within the fringe. 

 Along the ectocaudal edge of the elytron there is a series of short and slender 

 transparent rods projecting freely from the edge. (Plate 4, fig. 2, 3, (>). 



The tubercles vary from hemispherical to forms constricted at the base and 

 so more nearly spherical. The tubercles are densely spinescent, the spines 

 being proportionately longer and coarser on the smaller tubercles. (Plate 4, 

 fig. 4, 5). 



Each typical parapodium presents a stout, strongly conical neuropodium 

 which is slightly rounded or oblique across the distal end from which the setae 

 project. From the anterodorsal surface of the parapodium the notopodium 

 projects as a small lobe. The ventral cirrus is a short, acuminate process the 

 tip of which, when the cirrus is extended against the neuropodium, reaches the 

 bases of the neuropodial spines. The dorsal cirrus is about three times as long 

 as the ventral; it presents a stout subcorneal ceratophore which is about one 

 third of the total length; the filament is of the same form as the tentacular cirri 

 and tentacles, presenting a subterminal enlargement and terminal filament; 

 the cirrus is pale throughout except for a blackish annulus over the base and 

 one proximad of the subterminal enlargement. 



The ventral cirri of the first parapodia as usual are much longer than 

 the others. 



The anal cirri are broken off in the type-specimen. 



The notopodial setae are either straight or, more typically, curved over 

 their exposed portion. The exposed portion widens from the base to near the 

 middle of the length and then narrows distad to a point. Each seta appears in 

 surface view bipinnate, there appearing a fringe of close-set transparent fine 

 teeth along each side, but those of the convex side are decidedly longer and 

 extend along the seta farther than those of the opposite side. There is a 

 series of longitudinal lines or teeth across each segment as shown in Plate 4, 

 fig. 7, these decreasing in length from the convex side to the concave. Only 

 one type of seta was noted. The cortex shows a jointing, the cross-lines 

 being distinct and closely arranged and corresponding to the serrations, s 

 (Plate 5, fig. 1). 



The neuropodial setae are longer and much coarser than the notopodials, 



