232 Notes from the Gatty Marine Laboratory. 
small black spines at its base, and is long, tapering, and 
slightly moniliform. No dorsal bristles were visible in the 
preparation. 
The setigerous region tapers towards the outer extremity, 
where a papilla occurs. The spine is black and powerful. 
The bristles (Pl. I. fig. 10) have comparatively short shafts, 
which are minutely striated longitudinally and transversely 
as in allied forms. When seen on edge the tips of the shafts 
are somewhat fusiform, from the dilatation below the bevelled 
region. In lateral view, though the diameter is greater, the dila- 
tation is less pronounced and the striz are now oblique. ‘The 
terminal blade is comparatively short, has a web connecting 
its bevelled base with the shaft, is slightly curved, and tapers 
very little to the strongly forked (longitudinally split) terminal 
region. The dorsal limb of the fork, viz. that opposite the 
serrated edge, is the longer, but is frequently broken. It is 
proportionally longer in the upper bristles of the tuft. The 
edge of the blade is minutely spinous even up to the base of the 
fork. The ventral cirrus is slender and subulate, stretching 
beyond the fleshy tip of the setigerous process. The structure 
of this bristle would seem to be diagnostic, for though that of 
Stephania flecuosa of Delle Chiaje *, as figured by Claparédef, 
is a Step in its direction, yet not even uniform and continuous 
friction could make it resemble that of the present form, and 
this without referring to other distinctive characters of the 
species. 
EXPLANATION OF PLATE I. 
Fig. 1. Auterior foot of Nephthys Jeffreysti, x about 90 diam. 
Fig, 2. Anterior foot of Eteone japanensis. x 90 diam. 
Fig. 3. Anterior foot of Phyllodoce sp. ? from Gaspé Bay. xX 79 diam. 
Fig. 4. Thirtieth foot of Eteone cinerea, Web. & Bened. xX 250 diam. 
Fig. 5. Foot of Tyrrhena atlantica, Roule, viewed from the front. 
x 12 diam. 
Fig. 6. Bristle (with very short tip) of the foregoing. X about 
100 diam. 
Fig. 7. Tip ofa bristle of a specimen of Tyrrhena Claparédii from Naples. 
xX about 400 diam. : 
Fig. 8. Tip of a bristle from Tyrrhena atlantica procured by the 
‘Porcupine.’ x about 400 diam. 
Fig. 9. Head of Dathousiella Carpenteri, enlarged under a lens. The 
specimen was indifferent. 
Fig. 10. Distal blade and tip of the shaft of a bristle of the foregoing. 
x about 400 diam. 
* Mem. sugli Anim. senza Vert. il. pp. 368, 401, & 424, tay. xix. 
fig. 8; Descrizione e Not. iii. p. 97, v. p. 108, tav. exxix. fig. 8 
+ Supplem. Ann, Nap. 1870, p. 118, pl. xii. fig. 1. 
