1904.] NATURAL SCIENCES OF PHILADELPHIA. 169 



chalky in appearance. In another specimen this plate is less attenu- 

 ated anteriorly. The body throughout is much tinged with reddish- 

 orange which was probably the natural color. 



All of the thoracic setre are of the limbate type with rather short nar- 

 rowh^ lanceolate ends, especially slender on those of the smaller collar 

 tuft; all are colorless, very slight!}^ curved and of more uniform size 

 than usual. The abdominal, except at the caudal end, bear two 

 geniculate setse (fig. 38) on each side. They are transparent and color- 

 less, with broad, short, A'ery thin and pointed blades, bent nearly at 

 right angles to the shaft, and which appear to have the margin per- 

 fectly smootli. On the caudal somites the sette occur in tufts of 

 three, but occasionally two; they are long, slender, capillary, tapering 

 and curved, but wingless at the tip. 



The uncini are relatively small, very delicate, and much crowded, 

 with about 26 distinct and some smaller obscure teeth, all strongly 

 bent downward and overlapping. The upper part of the tooth- 

 bearing margin with the larger teeth rises prominently above the body 

 of the vmcinus. The thoracic micini (fig. 18) have the body quach'ate 

 with the truncate lower margin on a level with the elongated lower 

 tooth, while the abdominal uncini (fig. 17) have nearly triangular 

 bodies with the somewhat angulatcd margin not nearly reaching to 

 the end of the long tooth. This tooth is really a projection of the 

 body of the uncinus and itself bears a fringe of fine teeth on its basal 

 half. 



Two nearly complete tubes are present in the collection. They were 

 evidently attached at the base only, with the greater part upright and 

 straight or slightly sinuous, gradually increasing in diameter, perfectly 

 terete, the walls thick, porcellaneous, with a thin, somewhat rough, 

 chalky surface marked with distinct lines of growth, but without any 

 ridges or other special sculpturing. 



Suruga Bay, 3,707, 63-75 fms., 2 specimens. 

 Vermilia ctenophora n. sp. (PI. XII, figs. 21-25.) 



A complete example has a total length of 27 mm., the operculum 

 6.5 mm., gills 5.7 mm., and thorax 5 mm. An incomplete specimen is 

 larger. 



The branchife are considerably contracted and very compactly 

 packed into the tube, without any trace of a spiral twist. The undi- 

 vided base is relatively prominent, composing about ^ of the total length 

 of the gill. Wlien the branchiae are retracted the distal margin is 

 decidedly oblique and much longer ventrally. Radioles 20 on each 

 side, in the contracted state folded by the doublino- of the base dorsad 



