PARONUPHIS SOLENOTECTON. 309 



which are finely pointed, very narrowly Hmbate, and distally curved. The 

 stouter compound setae occur in a ventral group on the second and also the third 

 parapodia. On the succeeding parapodia the limbate setae become longer and 

 more numerous, with broader limbus, and are arranged in a dorsal and a ventral 

 group, the dorsal being longer than the ventral, and the pectinate setae occurring 

 in conjunction with them. (Plate 39, fig. 7). The stouter, hooked posterior 

 setae occur first on the tenth, eleventh, or twelfth parapodia, one or two on the 

 first on which appearing, and two on each succeeding parapodium. These setae 

 are stout and straight excepting for a weak curvature toward the distal end; 

 the teeth stout, acute, the distal one strongly curved, the lower one straight, 

 oblique, making an acute angle with the first; guards conspicuously developed, 

 transparent, striate, distally ending in a subacute point. (Plate 40, fig. 2). 



Maxillae pale excepting more especially the tips of the forceps, across their 

 proximal ends and edges of the supports, which are black. Maxillae I with 

 supports relatively long, each half acutely pointed at caudal end with caudal 

 notch between the two halves, anterorectal angle obliquely truncate, and the 

 caudoectal angle with a much longer oblique truncation, the side between the 

 two oblique faces straight or nearly so; forceps proper tapering distad, the tip 

 slender, bent strongly mesad, the broader proximal end with a laminate extension 

 on mesal side extending to about middle of length. (Plate 39, fig. 6). Maxillae 

 II with right plate, in the specimen dissected, with nine black-tipped teeth 

 which at caudal end are small and close, but cephalad with the spaces larger 

 and conspicuously wide, each tooth long, acute, and somewhat distally 

 curved; the most anterior longer and more strongly hooked; the left inner 

 plate with eight or nine similar teeth, the outer plate with same number, but 

 with the most anterior tooth especially long, and with a much wider space be- 

 tween the succeeding tooth and the third one than between others; a laminate 

 extension opposite this wider interval; the plates anteriorly are bent ectad, as 

 usual. Maxillae III are exceptionally long; the plates from the caudal ends 

 cephalad are convex, with the anterior ends more strongly curved and extending 

 ectad; left plate with ten teeth, right with twelve or thirteen. Maxillae IV 

 with a single black-tipped tooth at comer of mesal end, the plate narrowing ectad 

 and curved somewhat caudad. The mandibles with masticatoiy plates large 

 and white, each extending cephaloectad and diverging from the other in the 

 usual way; tip prolonged and subacute or often worn and rounded, a notch 

 proximally on ectal side, and a very conspicuous excision on the mesal side, with 

 a well-marked ventral furrow extending caudad from the excision; stem below 



