348 APPENDIX. 
as long as the first two segments; while in another spe- 
cimen nearly of the same size they are nearly equal in 
length to the first four segments, and in one or two 
small specimens not a third the length of the two just 
named. These cirri are equal in length to at least 
eleven of the first segments of the body. The shorter 
ones are only about half the length of the first segment 
of the body. The feet are well developed, the supe- 
rior branchial appendages are large and in the form of a 
leaf, giving the animal at first sight the appearance of a 
species of Phyllodon. The antenne are shorter than the 
palpi, which are strong and conical in shape.—Hab. 
Esquimalt Harbour, Vancouver Island. (Brit. Mus. Col.) 
This species approaches very nearly to Nereis virens 
from Newfoundland (vide Middendorf, Sibirische Reise 
Anulos 6, tab. i., figs. 2-6). 
Nereis bicanaliculata. (Baird.) N.S. 
This is rather a small species, about 2 inches long, 
and 24 lines in breadth. It is of a dull white colour, 
and is remarkable for having a channel running down 
both the dorsal and ventral sides. The channel on the 
dorsal surface is rather deep, commencing from the 
eleventh ring, and continues to the tail; the channel 
itself is quite smooth, the divisions or rings of the body 
not showing on its surface. On the ventral surface the 
channel shows marks of the divisions or rings into 
which the body is divided. The head is small, the 
antennze about equal in length to the palpi, and the 
tentacular cirri are equal to about five or six rings of 
the body. The upper portion of the body is rounded, 
