NO. 1 HARTMAN : POLYCHAETOUS ANNELIDS 39 



shallow median sulcus, the prostomial antennae inserted terminally, 4 

 black eyes on the posterior half (pi. 7, fig. 83). The posterior border 

 of the prostomium is overlapped by a pair of small lobes, median to the 

 posterior pair of eyes. A single specimen from 273-34 differs in that the 

 prostomium is slightly overlapped by a rounded median prolongation. 



Elytral fringe is trim, short, closely spaced (pi. 7, figs. 84, 85), 

 the reticulations are fine, mesh-like, the color disposed in minute spots 

 (pi. 7, fig. 86). The first pair, or also the next 2 or 3 pairs, are orna- 

 mented with pale conical macrotubercles (pi. 7, fig. 87), their tips 

 covered with numerous blunt spinelets (pi. 7, figs. 88, 90) in addition 

 to numerous smaller tubercles. In a specimen from 148-34 these macro- 

 tubercles (pi. 7, fig. 89) are much like those shown by Chamberlin 

 (1919a, pi. 4, fig. 5). In a specimen from 814-38 they are less sharply 

 pointed (pi. 7, fig. 88). Elytra more posteriorly have fewer large 

 tubercles, and appear almost smooth save for the numerous minute spine- 

 like tubercles. These are especially abundant along the fimbriate margin. 

 The microtubercles are pale, glistening, resembling oil droplets. The 

 elytra are grayish green with a conspicuous white spot over the elytro- 

 phore, as described by Chamberlin, but the setae are pale amber, not 

 brown. 



Dorsal cirri are long, slender, extending distally beyond the setae, 

 the terminal filament long, a brown ring below the subterminal en- 

 largement. 



Notopodial setae are spinose, ranging from blunt, short, to tapering 

 pointed. The longer setae are tapering, laciniole, with spinelets along 2 

 edges (pi. 7, fig. 95); the shorter setae are bluntly rounded distally. 

 Neuropodial setae are of one kind in median parapodia; they have a 

 well-developed subterminal tooth and 7 to 10 or 11 transverse rows of 

 pectinae, the most distal row of pectinae with the largest teeth (pi. 7, 

 figs. 93, 94). Neuropodial setae in the second segment are of two kinds, 

 (1) superior, heavier setae with bifid tip (pi. 7, fig. 92) and (2) paler, 

 slenderer, tapering, inferior setae (pi. 7, fig. 91). 



On the whole, these specimens agree with Chamberlin's description. 

 The prostomium, however, is more tj^pically lepidonotoid than origi- 

 nally shown. The macrotubercles are variable in size and form, from 

 one individual to another. There is great similarity, however, in the 

 shape of the elytra, the proportions and parts of the notopodial and 

 neuropodial setae. 



Distribution. — Galapagos Islands, Tenacatita Bay, western Mexico. 

 Intertidal to 75 fms. 



