252 PROCEEDINGS OF THE ACADEMY OF [April, 



Eunice hawaiensis Tread well? 



Eunice hawaiensis Treadwell, Bull. U. S. Fish Comm., XXIII (1906), PI. 

 Ill, pp. 1166, 1167, figs. 42-44. 



The solitary incomplete example referred to here, while differing 

 considerably from Treadwell' s description, is certainly very closely 

 related to, if not identical with, E. hawaiensis. It consists of 122 ante- 

 rior segments having a length of 76 mm. and a width without parapodia 

 of 5.5 mm. and with them, but excluding setse, of 8.5 mm. 



The prostomium with its tentacles, the parapodia, setae (of which, 

 however, Treadwell's figure does not show a full profile view), and 

 maxillse are practically identical with those of E. hawaiensis. The 

 branchia?, however, are fewer and much less complex than those of the 

 type. They have the following distribution and number of filaments 

 on the right side, the left being almost identical : 1 filament somite V, 

 2 filaments somite VIII, 5 on IX, 9 on X, 13 on XII, 15 on XV, 19 on 

 XX, 15 on XXVI, 16 on XXXV, 8 on XL, 5 on XLII, 2 on XLIII and 

 1 on XLIV. Wheie best developed, from XV to XXX, the gills are 

 very large with numerous long, parallel filaments equalling about 

 one-third the. body width. Although closely resembling the gills of 

 E. hawaiensis , the stems are always gently curved, never abruptly 

 bent. The first three consist of the main trunks only. The type of 

 E. hawaiensis is larger, measuring 7 mm. in body width and has the 

 gills beginning on IV with three filaments and continuing to beyond 

 L, and when best developed possessing as many as thirty filaments. 

 This is a greater difference than one would expect in two individuals 

 of the same species differing no more in size than do these. 



The hard, white masticatory plates of the mandibles, in addition 

 to the large lateral tooth, bear three small teeth near the median line. 



Eunice congesta v. Marenzeller may be mentioned as another closely 

 related Pacific species. 



Station 4,537, off Point Pinos Lighthouse, Monterey Bay, 1,062 

 fathoms,, hard sand and mud. 



Marphysa conferta sp. nov. PI. XVI, figs. 29-34. 



Known from a single specimen 24 mm. long and 1.9 mm. wide be- 

 twin tips of parapodia with 57 segments and a regeneration cone of 

 about a dozen indistinct segments. 



Prostomium (PI. XVI, fig. 29) large, nearly as wide as the peris- 

 tomium, suborbicular but bent downward so that in dorsal view it is 

 foreshortened and appears much wider than long, depressed, with an 

 anterior notch that is the termination of a ventral groove that slightly 

 divides it into somewhat swollen rounded halves. Eyes one pair, 



