8 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 69 



The notopodiiim (fig. 6) is rudimentary and has a single acicula. 

 On its dorsal surface is a small tuft of setae of two kinds. The 

 larger ones are bluntly rounded at the apex and have a number of 

 transverse rows of minute teeth continued nearly to the tip. (Fig. 

 7.) The smaller ones are slightly swollen toward the apex but 

 narrow to an acute point, and have smooth margins. They are 

 figured by Grube (1878, fig. 4&) with sufficient accuracy though he 

 exaggerates the depth of the surface depression. The end of the 

 neuropodium is more or less lobed but the anterior and posterior 

 lips are approximately of the same length. There is a single very 

 heavy acicula. The neuropoclial setae project to a considerable 

 distance beyond the apex of the neuropodium. They have stout 

 shafts which widen toward the apices gind then narrow rapidly and 

 asymetrically to form a blunt point, one side of which is convex, 

 the other slightly concave. At a short distance behind this widened 

 area are 7 or 8 rows of toothed plates (fig. 8). There is no sub- 

 terminal tooth. 



Grube's (1869) description was of specimens labeled merely as 

 from the Red Sea, and he refers to some in the Godeffroy collection 

 "von Samoa und der Vitit-Inseln." Those in his 1878 paper were 

 collected at Bohol in the Philippines. My specimens were collected 

 at both Suva, Fiji, and Pango Pango, Samoa. 



Genus HALOSYDNA Kinberg 



HALOSYDNA VEXILLARIUS Moore 

 Halosijdna vexiUarius Moore, 1903, pp. 41.5-417 ; pi. 23, figs. 13, 14, 1-5. 



Moore's description was based on a single specimen. In this present 

 collection from China is one entire individual collected by Dr. N. 

 Gist Gee at Peiyushan Lighthouse Station; with a fragment of 

 another, labeled as from " side saddle." These differ from Moore's 

 description in such details as proportionate length of tentacles, which 

 in view of the limited number observed seem not be of sufficient im- 

 portance to outweigh the points of agreement. 



HALOSYDNA OCULATA, new species 



The type specimen is 22 mm. long, with a greatest body width 

 of 2.5 mm., the prostomium being about 1 mm. wide. 



The prostomium is slightly wider than long. (Fig. 9.) It is 

 divided by two ) ( shaped lines into a narrow central region, and two 

 lateral regions, the latter rounded dorsally and dorso-ventrally are 

 thicker than the former. Posteriorly the three areas are confluent, 

 this region being overlapped by a fold from the anterior margin of 

 somite 1. The cirrophore of the median tentacle is a little narrower 

 than the central prostomial area and extends forward from it. It 



