NO. 1 HARTMAN : POLYCHAETOUS ANNELIDS 41 



bercles, which under magnification resemble hedge apples; those on the 

 first pair form a closel}^ set row around the periphery of the scale, and 

 others are scattered over the dorsal surface. On more posterior elytra 

 only a few of the tubercles are large, most of them are much smaller 

 and depressed, causing the surface to look pitted. An area over the 

 hilum is pale, the surface at the sides of, and posterior to, this area is 

 usually mottled with gray pigment. 



The prostomial prolongations, their cirri, the median ceratophore 

 and its style are dusky. There are 4 eyes, the anterior pair at the sides, 

 near the middle of the prostomium. The other pair is near the posterior 

 margin of the prostomium, somewhat concealed by the overhanging fold 

 from the succeeding segment (pi. 5, fig. 61). It may be for this reason 

 that Ehlers showed only 2 eyes (1901, pi. 3, fig. 2). 



Neuropodial setae are pale amber, notopodial setae light yellow. 

 The dorsal and ventral acicula are light brown and project from their 

 respective lobes a short distance. The dorsal and ventral setae are each 

 of only one kind. The former are transversely serrated, some have a 

 blunt tip and are shorter, others are longer, pointed. The neuropodial 

 setae are simple, without subdistal tooth or with a small subterminal 

 swelling. In the first parapodium, the dorsalmost (pi. 5, fig. 59) and 

 ventralmost (pi. 5, fig. 60) neuropodial setae are simple but the dorsal- 

 most are thicker and thickened subdistally. There are no smooth noto- 

 podial setae, shown by Ehlers (1901, pi. 3, fig. 6), such as characterize 

 the genus Thormora. In other respects these individuals agree well with 

 the description and figures of this species. 



In spite of the great differences in the bathymetric ranges of the two 

 individuals herein considered (165 fms. and shore) there are no signifi- 

 cant difiFerences between them. The tuberculation of the elytra is less 

 marked in the intertidal individual, but the tubercles do not differ in 

 their details. 



The identity of L. versicolor Ehlers and L. argus (Quatrefages) 

 from Australia appears not unlikely. Both have elytra with entire mar- 

 gins and subglobular surface tubercles; the neuropodial setae are entire 

 distally, including those in the first parapodium. In L. argus, however, 

 the larger tubercles are sparsely covered with spinelets (Fauvel, 1917, 

 pi. 4, fig. 9), compared to the condition in L. versicolor (Ehlers, pi. 3, 

 fig. 5). 



Distribution. — Juan Fernandez, western South America; Gulf of 

 California, lower half, Mexico. Intertidal to 165 fms. 



