64 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 7 



beaded, its lateral margin fringed (pi. 13, figs. 163, 164). The surface 

 is papillated, with wart-like elevations, those on anterior elytra finer 

 than those more posteriorly. 



The neuropodium terminates in a small lobe (pi. 13, fig. 166) at 

 the place where the aciculum emerges. The ventral cirrus has a dorsal 

 flange at its proximal end. Neuropodial setae include ( 1 ) spinose, 

 simple setae, and slender, long shafted composite setae in the superior- 

 most part of the fascicle, the latter with a spinose shaft; (2) stouter 

 composite setae with longer or shorter appendage, the secondary tooth 

 closely appressed (pi. 13, fig. 165) ; and (3) slender, inferior composite 

 setae. 



Distribution. — Eastern Australia; Panama; Costa Rica; Mexico. 

 Subintertidal to 25 fms. 



Sthenelais maculata, new species 

 Plate 15, Figs. 176-187 



Collection. — 21 Z-3A, 364-35, 373-35, 379-35, 634-37, 639-37, 

 833-38 (Holotype). 10 specimens. 



Length of 50 anterior segments (833-38) is 31 mm, width at 

 fortieth segment across elytra is 3 mm, with setae 4 mm. Another 

 smaller, but nearly complete, individual, lacking the prostomium, is 40 

 mm for 112 segments (634-37). Dorsum completely covered by elytra. 

 The latter are pale or cream colored, each overlain with a black ring 

 about the elytrophorous region, and a triangular fulvous area median 

 to the ring (pi. 15, figs. 178, 182, 183). 



Prostomium trapezoidal, broader than long, widest in its anterior 

 half, without a median sulcus; the anterior eyes are in front of, and at 

 the sides of, the median ceratophore, the posterior pair slightly an- 

 terior to the middle of the prostomium. Median ceratophore is about as 

 long as the prostomium, its lateral expansions broad and extending dis- 

 tally beyond the main stalk. The median antenna is about twice as long 

 as its ceratophore. Palpi are white, tapering, and extend distally to the 

 sixth parapodium. 



The first parapodium is directed anteriorly, its notopodial setae 

 overlapping medially in front of the prostomium. Branchiae are present 

 from the fourth segment (=second elytrophorous) ; they are cirriform, 

 recurved, heavily ciliated on their ventral side. Parapodial ctenidia 

 occur in threes, nearly filling the space between the branchial base and 

 the notopodial base (pi. 15, fig. 180). 



