342 PROCEEDINGS OF THE ACADEMY OF [April., 



setae with their remarkably rich pectination consisting of forty or 

 more pairs of combs reaching nearly to the tip. 



Marenzeller's figure of the prostomium is undoubtedly drawn from 

 a specimen in which the peaks were retracted and bent dorsad so that 

 they fail to be represented in the figure. All of my specimens possess 

 minute but quite evident peaks. If my interpretation be correct 

 the ventral lamella referred to by v. Marenzeller is an integumental 

 fold close to the nephridial papillae and under certain conditions of 

 preservation appears in many species. It is therefore not diagnostic 

 and occurs in Mime of these specimens and is absent from others. 



Typical elytra quite like v. Marenzeller's figure were found in bottles 

 containing specimens of this species from stations 4,339, 4.405, 4,425 

 and 4.42X. The margin bears but a few short cilia and the outer 

 surface is thickly studded with small, truncate horny spines among 

 which are scattered, posterior to the attachment and more or less 

 arranged in oblique rows, the larger soft papillae. These are generally 

 brown in color and of low, rounded, somewhat recumbent form and 

 appear to be hollow. Usually they are small and quite numerous. 

 Others have the papillae near the posterior border much more enlarged 

 and several from stations 4.339 and 4,405 have few small soft papilla? 

 but much larger mammilliform or sugar-loaf-shaped submarginal 

 papillae exactly like those of the types of L. nndtisetosa papillata. In 

 one case these papillae number only four or five, clavate and connate with 

 the surface of the scale except at the tips, and in the case of two elytra 

 from station 4,405, which appear to be the first pair, the papilla? are 

 large, decumbent cones. 



The setae agree closely with v. Marenzeller's figures but the accessor}' 

 tooth of the tip of the neuropodiaLs is present more commonly than 

 he indicates and the pectinated plates reach nearer to the tip. The 

 rows of spines of the notopodials always reach nearly to the blunt 

 tip which is frequently roughened but the extent of the tip thus 

 exposed varies somewhat. 



While most of the specimens are small and much broken some of 

 those from station 4,405, although completely denuded of appendages, 

 have all segments present. One of the largest of these has forty-three 

 segments, the fifteenth pair of elvtrophores occurring on XXXII, and 

 measures 55 mm. by 15 mm. between setae tips. Marenzeller gives 

 only thirty-six segments. 



The color above is a pale or medium brown with two narrow, white 

 lines across each segment, the venter gray ; elytra more or less suffused 

 with brown on the medial half. Several of the specimens are filled 

 with eggs. 



