RHODINE GRACILIOR. 299 



a little narrowed posteriorly, and terminating in a slightly oblique plate with smooth rim, 

 the anus being over its dorsal margin. Nephridia in several segments. Well-developed 

 glands on the ventral surface of the anterior segments. Some of the anterior segments, 

 besides the spines, show modified hooks. The hooks have several hairs (gular). Tube free 

 or slightly fixed. 



Notoproctus. Fragment. Plate CVIII, fig. 2 — hook. 



A fragment came from a station off Cape Guardia in forty-five fathoms, in the 

 'Porcupine ' Expedition of 1870, and in this the hooks are remarkable for the erect con- 

 dition of the teeth above the great fang (Plate CVIII, fig. 2), thus somewhat approaching 

 certain species of Nicomache. It is a form of some size. 



Genus CXVII. — Rhodine, Malmgren, 1866. 



No cephalic plate ; buccal and first setigerous segment connate, tapered to a conical 

 point. A short keel between the nuchal organs. No eyes. Body sub-cylindrical ; number 

 of segments thirty-five to thirty-seven (Tauber and Arwidsson). First bristled segment 

 narrowed posteriorly, and so with the two or three following. Feet in the middle of 

 bristled segments one to eight. The groove between segments 9 and 10 (bristled) is 

 absent or indistinct. The following segments are long. Segments 2 to 9 furnished with 

 glands. Anus central in an anal plate. Proboscis with transverse rows of papillae. 

 Capillary bristles smooth, the longer with narrow wings; the shorter with broader wings. 

 Hooks absent in the four anterior segments, but commence on the fifth, in the rest biserial, 

 with a short shaft widening to the shoulder, above which is an anterior pointed 

 process. The main fang is long and curved, and several teeth occur on the crown above. 

 A small free tube. 



1. Rhodine giucilioe, Tauber, 1879. Plate XCIX, fig. 8— segment; Plate CVIII, figs. 

 3 to 3 b — bristles and hook ; Plate CIX, fig. 1 — hook. 



Specific Characters. — The anterior region of the body (two bristled segments) 

 somewhat long and small. The collar of bristled-segments two and three not emarginate 

 dorsally. The posterior collar begins at the seventeenth bristled segment. The 

 collar at the posterior end very short and dorsally crenulate, with a median bite. 

 Nephridia in bristled segments 5 to 9. The third bristled segment has behind the 

 collar a well-developed glandular belt, and a less developed glandular area behind the 

 foot. No glandular belt behind the posterior collars. The hooks are in a double row 

 from the fifteenth segment inclusive, and they somewhat resemble those of B. Loveni, but 

 the process behind the great fang is shorter and the great fang larger. Colour, reddish 

 in front, with brownish glandular belts, which have a small white rim in front, and a 

 similar but broader border occurs on the lateral dorsal region behind the feet. A 

 white band also is situated dorsally behind the feet of segments 4 to 7, and in several 



