544 PROCEEDINGS OF THE ACADEMY OF [Ju]y, 



with the same. Owing to their being distended with eggs the parapod i a 

 are dull yellowish. The entire ventral surface is dirty white. 



The setse seen in mass are of a pale yellow color. The notopodials 

 (fig. 29) arise from the base of the prolonged acicular process and spread 

 horizontally. They are very long and slender, capillary, nearly straight, 

 tapered regularly from the base and smooth or with barely discernible 

 marginal denticulations and oblique striations. Although the noto- 

 podium is well developed on II, III, and IV, it bears no setse on these 

 somites; the extreme posterior ones are very small. The neuro- 

 podial setse form a large vertical tuft and are of two forms. Those 

 dorsal to the aciculum have slightly enlarged ends more or less denticu- 

 late and pectinate and tapering to simple pointed tips. The dorsal- 

 most are slender with long capillary tips and very fine pectination. 

 The ventral ones are much coarser, with shorter and more conspicu- 

 ously pectinated tips (fig. 28). The subacicular setae have bifid tips 

 (figs. 26,27). They are rather abruptly enlarged at the end. rather 

 stout, strongly curved and conspicuously pectinated. The bifid tip has 

 the stout limb beak-like and the slender one bent toward it or even 

 hooked. 



The type and only known specimen comes from station 4,198, in 

 157 to 230 fathoms, on Halibut Bank, in the Gulf of Georgia. 



Lepidonotus robustus sp. nov. PI. XXXVI, figs. 32-35. 



Founded upon a single example, which the label describes as taken 

 from a hermit crab, this species bears a striking superficial resemblance 

 to the similarly commensalistic Eunoe depressa. The type is of rela- 

 tively large size and robust Ijuild, measuring 40 mm. long, 13 mm. wide 

 between the tips of the parapodia of X and about 8 mm. deep. 



Without including the tentacular prolongations the prostomium is 

 about f as long as wide, the posterior border straight and somewhat 

 concealed by a fold of the succeeding somite, the lateral surfaces bulging 

 into ocular prominences behind the middle and converging thence grad- 

 ually into the lateral borders of the tentacular prolongations. The 

 latter are of the usual form, slightly divergent, and as long as the body 

 of the prostomium. There are two pairs of eyes, prominent, black, 

 circular and lenseless. The anterior are much the larger, situated on 

 the lateral swellings and look outward, forward and upward. The 

 posterior pair are near the posterior border and directed upward. 



All cephalic appendages are short and stout and lack cilia and 

 papillse. The middle tentacle has a short, very stout base somewhat 

 ventral to the tentacular prolongations with which it is largely coa- 

 lesced; its style is about IJ times the length of the prostomium with 



