168 Prof. M‘Intosh’s Notes from the 
with a pale yellowish light, often extremely faint, and thus 
in contrast with Harmothoé imbricata and Polynoé scolo- 
pendrina, in which the phosphorescence is more vivid. Asa 
rule Gattyana occupies a position close to the mouth of the 
long tube of the Amphitrite beneath large stones near low- 
water mark, so that it is well protected from marauders, even 
supposing they were attracted by its light. In the same way 
its opportunities for alluring other animals are curtailed; so 
that the remarks formerly made in this connexion still hold. 
2. On a new Evarne (E. atlantica) from Rockall. 
A fragment of about fifteen segments of the anterior end 
was dredged at Station III. A by the Royal Irish Academy’s 
expedition on 15th June, 1896. 
The head resembles that of 2. zmpar, Johnst., in general 
outline, but differs in having somewhat smaller eyes. The 
tentacles and palpi also are similar, though the cilia on the 
former and the minute papilla on the latter are less bold. 
The cirri generally are a little more slender. 
The body is thicker and more massive than in &. impar 
of the same size, and both dorsally and ventrally in the 
preparation has a pinkish skin-colour. The arrangement of 
the bristles at the side of the body is more trim. No 
nephridial papilla is observable, though the eminence: is 
distinct. In this respect it agrees with H. zmpar of the same 
size, in which the papilla only becomes noticeable about the 
twelfth bristled foot. In large examples it is evident on the 
seventh bristled foot. 
The first foot (bearing the tentacular cirri) has a few short 
bristles conforming to the dorsal type, though with somewhat 
closer rows of spines. In the second foot the dorsal bristles 
are longer and less curved than in #. ¢mpar, and while there 
may be room for doubt concerning the proportionate distances 
of the spinous rows, there can be none about the length of the 
smooth portion at the tip, which is diagnostic of this form 
and also of Hvarne Normant. ‘The present species differs 
from the latter again in the more tapering extremities of these 
bristles and in the closer rows of spines (cf figs. 11 and 13, 
Pl. II1.). The spinous tips of the ventral series are some- 
what longer than in #. impar, and in this respect approach 
E. Normani. 
In the typical foot the lower lobe is more pointed and the 
ventral cirrus longer than in #. ¢mpar, so that it projects as 
far as the tip of the foot. The translucent dorsal bristles 
(Pl. Ill. fig. 11) are considerably longer and less curved 
