98 Zoological Society :— 
selves to pieces on the slightest touch, or however carefully killed.” 
In this respect it resembles a species of Annelide belonging to the 
group of vermiform Aphrodisians, described by Risso as occurring 
in the Mediterranean, under the name of Humolpe fragilis. 
Hab. Esquimalt Harbour, Vancouver Island (Mus. Brit.). 
5. Nerurs FouiaTa, Baird. 
This Nereid is of a dark grey colour above, and of a lighter hue 
underneath, somewhat iridescent. It is 15 inches in length, and 
at the broadest part is about 4 an inch in breadth. It tapers gradu- 
ally towards the tail, which terminates in two short, blunt, caudal 
styles. The first or occipital segment of the body is about twice the 
length of the second. The tentacular cirri are unequal, and vary 
in length: in the largest and best-developed specimen the longest 
are only about as long as the first two segments ; while in another 
specimen, 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 mentioned, 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 superior branchial ap- 
pendages are large and in the form of a leaf, giving the animal at 
first sight the appearance of a species of Phyllodon. The antennex 
are shorter than the palpi, which are strong and conical in shape. 
Hab. Esquimalt Harbour, Vancouver Island (Mus. Brit.). 
This species approaches very nearly to Nereis virens of Sars, from 
Newfoundland (vide Middendorf, Sibirische Reise, Annulos. 6, 
tab. i. figs. 2-6). 
6. NEREIS BICANALICULATA, Baird. 
This is rather a small species, about 2 inches long, and 2% 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 an- 
tennze 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, and not channeled ; and the tail terminates in 
a round, blunt knob, without caudal filaments. The feet are rather 
small, but are rendered unusually distinct from the peculiar manner 
in which the rings or divisions of the body are interrupted by the 
channel runing along the centre of the body. It tapers very gra- 
dually, and almost imperceptibly for some time, from the head to the 
tail. 
Hab. Esquimalt Harbour, Vancouver Island (Mus. Brit.). 
7. GLYCERA CORRUGATA, Baird. 
This Annelide is about 4 inches in length, exclusive of the pro- 
ee 
