454 PROCEEDINGS OF THE ACADEMY OF [June^, 



LUMBRICONEREID^. 

 Lumbriconereis heteropoda v. Marenz. 



This .species and L. bifurcata Mcintosh are very closel}' alhed, if not 

 identical; some of the examples contained in the present collection 

 are so nearly intermediate between the two that difficulty was found 

 in referring them. As a whole the series is most closely connected 

 with L. heteropoda, which is also the prior name. It is the most abundant 

 and widely distributed species contained in the collections, occurring 

 at all locahties on the coast of Japan at which dredging was done, 

 though in many cases represented by fragments only, and at depths 

 from 36 to 190 fathoms. It was taken at the folloTving stations: 

 3,695; 3,698, 3,703, 3,707, 3,714, 3,724, 3,735, 3,738, 3,739, 3,740 and 

 3,755. 

 Lumbriconereis japonica v. Marenz. 



Sagami Bay, 3,698, 153 fms.; Sm-uga Bay, 3,717, 100 fms.; 3,718, 

 65 fms. ; 3,736, 480 fms. 

 Laranda robusta sp. nov. (PI. XXVI, figs. 64. 65.) 



This is evidently a species of large size. The incomplete type speci- 

 men has a width of 6.5 mm., and a length of 165 mm, for the head and 

 anterior 202 somites, and a smaller example of less than ^ the diameter 

 of the type, consisting of upward of 400 somites, of wdiich the posterior 

 100 or so have been recently regenerated, measures 210 mm. 



The prostomium has a peculiar flattened form, curved and hollowed 

 below like the bowl of a spoon ; the outline from above has the form of 

 a haycock with a broad base ; in the larger specimens its length is less 

 than the first 3 somites, in the smaller one considerably greater; in 

 both it has a distinct dorsal longitudinal sulcus, and is slightly dove- 

 tailed into the peristomium. No eyes visible. 



The peristomium and the next segment are nearly identical in form, 

 the former differing only in its relation to the mouth and prostomium, 

 and in the more strongly marked postoral grooves ; both are very dis- 

 tinctly marked, and are shorter than the first setigerous somite. 



The body is nearly circular in section throughout, the dorsum 

 slightly more convex than the venter, wdth the parapodia somewhat 

 below the middle lateral line, especially toward the posterior end. The 

 diameter is remarkably uniform, with a shght increase toward the 

 middle, and a sudden diminution in the last 7 or 8 mm. of the small 

 specimen. All of the segments are very distinctly marked and of 

 equal length for at least | of the length. No anal cirri are present. 



The parapodia are uniform in character throughout; in the middle 

 of the body, where they reach the largest size they about ec^ual the 



