ANAITIS ROSEA. 71 



the occurrence of the four pairs of tentacular cirri on three segments in the latter and on 

 two in the former. He, however, observes that it is still uncertain whether the buccal 

 segment does not represent two fused segments. In some a minute ventral cirrus occurs 

 under the last pair of tentacular cirri (e.g. Anaitis cephalotes, Claparede). 



1. Anaitis rosea, Mcintosh, 1877. Plate XLIII, fig. 4; Plate LXVIII, fig. 13— foot; 



PL LXXVII, fig. 10— bristle. 



Specific Characters. — Head somewhat ovoid, slightly tapered in front, little diffe- 

 rentiated from the first segment. Eyes comparatively small; situated at the posterior 

 third. In front of them is a bright rose-red band slanting downward and backward, and 

 curving to join the larger rose-red area. A pinkish band from the tip of the snout joins 

 the latter behind the eyes, thus isolating a pale area around each eye. A broad belt of 

 rose-red occurs in rear of the eyes, and a pale wedge impinges behind into its centre. 

 Tentacular cirri as in Phyllodoce. Body tapered in front, and more distinctly so 

 posteriorly, rose-red dorsally, marked along the centre by a yellow band which is flecked 

 with reddish grains. Surface generally is pale buff. Foot with a prominent pedicle 

 bearing a lanceolate dorsal cirrus, and a slightly bifid setigerous process. The enlarged 

 ends of the gently curved bristles are spinulose along the terminal curves, and the blade 

 is elongate, tapering, and finely serrated. The ventral cirri are lanceolate, acutely 

 pointed, and project beyond the tip of the bristle-bearing process. Tail terminated by 

 two short curved cirri. 



Synonym. 

 1877. Anaitis rosea, Mcintosh. Journ. Linn. Soc, xiii, p. 161. 



Habitat. — In the sand near low-water mark, East Sands, St. Andrews, September, 

 1876. In 8 fathoms amongst sand in the Bight of Vatsland, north of Bressay Sound, 

 Shetland. 



Head. — Somewhat ovoid in outline, slightly tapered in front, while posteriorly it is 

 hardly differentiated from the succeeding segment. The two circular eyes are situated 

 at the posterior third and are comparatively small. It is pale anteriorly as likewise are 

 the tentacles, which are subulate and tapering. In front of each eye is a bright rose-red 

 band, slanting downward and backward and then curving to join the larger rose-red area. 

 Moreover a pinkish band from the tip of the snout joins the latter behind the eyes, thus 

 mapping off the pale area around each eye. A broad belt of rose-red occurs in rear of 

 the eyes, into the centre of which impinges a pale wedge from behind, so that the lateral 

 roseate regions as seen from the dorsum are somewhat triangular. The same rose-red 

 hue tints the bases of the tentacular cirri, which have the normal arrangement, viz. two 

 shorter in front and two longer behind. 



Body 1\ inches long, somewhat tapered in front and more distinctly so posteriorly, 

 of a fine rose-red dorsally, marked along the centre by a yellow band — from the fourth 

 segment to the tip of the tail. For the first three segments the band is flecked with 

 reddish grains, but thereafter it is bright yellow. On each side the surface is minutely 



