ANAITIS JEFFKEYSII. ^ 



Body about 2 inches in length, apparently rather short and broad as . well as soft. 

 The dorsum is almost bare, for the large dorsal cirri do not much encroach on it. The 

 tail is absent, but the body tapers much more in this region than anteriorly, though, as 

 already indicated, the proportional breadth throughout is considerable. The bristles 

 freely project on each side beyond the lamella?. The segments have a prominent fold 

 dorsally at their posterior border, a pit on each side at the base of the lamellae indicating 

 the commencement of the succeeding ring. 



The foot (Plate LXVIII, figs. 14 [10 th ] and 15 [35 th ] ) shows a broad and massive 

 dorsal division which is directed upward and bears the large, foliaceous, and somewhat 

 cordate cirrus which is more or less oblique in position — that is, is not quite horizontal. 



The inferior division forms a short cone with a bifid tip and a pale spine. The 

 translucent bristles (Plate LXXVII, fig. 11) are of considerable length, the shaft being 

 slightly curved and the distal enlargement comparatively small and of peculiar formation. 

 The front of the shaft ends in a somewhat conical process with a bifid tip. The pro- 

 cesses slope from behind to the serrated edge of the blade. The posterior border again 

 shows a marked step at the base of the cone, and from this the long and very finely 

 attenuate distal blade takes its origin (as if articulated), its front edge, which is finely 

 serrated, trending from the spinous tip of the cone. When the terminal blade snaps, the 

 distal end of the shaft thus presents a somewhat trifid appearance. The structure of 

 such a bristle differs materially from that in Anaitis rosea, and shows with other features 

 the necessity for the relegation of that species to another genus. Malmgren's artist had 

 caught the peculiarity, though somewhat indistinctly. 



The inferior cirrus is more or less elliptico-subacuminate, and its tip projects 

 considerably beyond the bifid apex of the setigerous region. 



Claparede's Anaitis pusilla 1 (1870) is an allied form. 



3. Anaitis Jeffreysii, 3 n.s. Plate LVIII, fig. 7; Plate LXVIII, figs. 16 and 17— feet; 



Plate LXXVII, fig. 12— bristle. 



Specific Characters. — Head ovoid, narrowed anteriorly, and cordate posteriorly ; two 

 eyes near the posterior border. Tentacles subulate with delicately tapered tips, and the 

 second pair of tentacular cirri is unusually long and also finely tapered. Body iridescent. 

 Dorsal cirrus large and irregularly renif orm ; setigerous process elongate and bifid. Shafts 

 of the bristles have dilated ends with spinous curves on each side of the base of the long 

 finely tapered and serrated terminal blade. Ventral cirrus more or less lanceolate. 



Habitat. — Dredged off Valencia Harbour, west coast of Ireland, May 31st, 1870 

 (J. G-. J.). 



Head (Plate LVIII, fig. 7) somewhat ovoid, narrowed anteriorly, cordate posteriorly, 

 and with two moderately large eyes towards its posterior border. Tentacles subulate 

 with delicately tapered tips. The second pair of tentacular cirri appears to be more 

 slender and elongated than usual, and the tips are finely tapered. 



1 ' Annel. Nap., Suppl./ p. 96, pi. ix, f . 5. 



2 Named after my old friend and veteran explorer of the British seas. The type represented by 

 Dr. Grwyn Jeffreys is now almost extinct. 



67 



