PHYLLODOCE VITTATA. 93 



two pairs with bristles ; the third segment carries the fourth pair, accompanied by a 

 rudiment of a foot with bristles and a minute ventral cirrus. 



Body about four or more inches in length, little tapered anteriorly ; much more 

 distinctly posteriorly where it terminates in two fusiform cirri (Plate LVIII, fig. 25) 

 which are broad at the base — tapered distally. In this case, however, the tail appears 

 to be undergoing reproduction. The cirri are not compressed, and from the third to the 

 last segment the middle of the back is marked by green or blue bands, parallel and 

 longitudinal, agreeing the one with the other. 



The proboscis is papillose anteriorly, and has eight large papillas at the entrance to 

 the stomach. 



The dorsal cirri (Plate LXVIII, fig. 9) are throughout of a fine red colour, large, 

 cordiform, and imbricate. From a median streak, which extends from the short conical 

 pedicle, parallel lines radiate to the circumference. The setigerous region forms a 

 short blunt bifid cone supported by a single translucent spine, and the translucent 

 bristles (Plate LXXVII, figs. 8 and 8 a) which project from it are slightly curved towards 

 the tip of the shaft, which is somewhat abruptly dilated, truncated, a little bevelled, and 

 shows only traces of spinous striae. The terminal piece is short or of moderate length, 

 finely serrated, tapered, and often bent at the tip. The ventral cirrus is about a fourth 

 as large as the dorsal, and is more or less renif orm with a tendency to be more distinctly 

 pointed in the posterior part of the body. 



This is a southern form of great beauty, and may be a young stage or a variety of a 

 better known form, such as Phyllodoce Paretti. 



The only British examples of this form are those forwarded from Plymouth by 

 Dr. Allen. So far as shown by an examination of the living specimen, from which the 

 figure (Plate XLVII, fig. 4) was taken, it would seem to approach a variety of Phyllodoce 

 Paretti, especially as the dorsal cirri, the ventral cirri, and the bristles resemble each 

 other closely. Both have the tips of the shafts of the bristles somewhat truncated and 

 spinous, and the terminal pieces short, and while the bristles in the larger examples of 

 P. Paretti are more deeply tinted brownish those in P. rubiginosa are also slightly tinted. 

 Unfortunately the enlarged drawing of the bristle given by De St. Joseph is not sufficiently 

 detailed for accurate diagnosis. Besides, all the examples of the latter sent from Plymouth 

 have been small, so it is probable that slight differences may occur during growth. The 

 shape of the head and eyes, the large size of the tentacles, and the shape of the tentacular 

 cirri more or less correspond. Further examination of the life-history of each form is 

 therefore very desirable. 



6. Phyllodoce vittata, Ehlers, 1864. Plate LXVII, figs. 10— 12— feet; PI. LXXVII, 



fig. 9 — bristle. 



Specific Characters. — Head short and rounded, with rather short and thick tentacles 

 and tentacular cirri. Eyes two, comparatively large. Body 1J inches long, dotted with 

 brownish pigment, which also occurs on the anterior lamellae. Dorsal division of the foot 

 carrying an ovate cirrus of considerable size with smoothly rounded margins. Spinigerous 



