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small horn. Proboscis nearly as long as the terete portion of 
the body, curved, fluted above, armed with seven minute 
black jaws, five in the upper and two in the lower half; 
middle jaws larger tridentate. At each side of the basal 
portion there is also a row of minute inversely Y-shaped 
black dentacles, eight in number. 
Very rare, only one specimen collected. I have great 
pleasure in associating the name of Dr. Alcock, who has done 
so much for the spread of natural science in Manchester, 
with this curious species. 
G, maculata , Johns ; the only other British species is 
distinguished' t>y its greater length, 4 to 6 inches, or, accord- 
ing to Oersted, 18 to 20 inches ; whilst its extreme breadth 
is only a line and a half! This species, according to 
Johnson, is destitute of jaws, and Dr. Baird informs me from 
Oersted’s figure there appear to be no anal cirri. It is 
distinguished also by having three brown maculae on each 
segment. In G. Norvegica, Oers., there are eighteen den- 
tacles on each side of the proboscis. 
Glycera alba , Lam. 
A single specimen only obtained among tufts of Anten- 
naria antennina. 
Pollicita peripatus, Johns. 
Several specimens found at the base of Aleyonium digitatum 
brought from deep water after storms. 
Scyllis prolifer a, Mull. 
Probably abundant in wet places, covered with a stratum 
of mud, but from its minute size easily overlooked. 
Nereis pelagica, L. 
N. viridis, L. {N. cerulia , Penn.) Both these species 
are abundant in wet hollows, about half-tide mark, occupying 
a deep burrow in the sand. They vary much in colour, from 
a deep velvetty green to orange. There is another form, 
with longer feet, bright orange or flesh-coloured, shaded with 
olive, which is frequent near high-water mark, where the 
tide is absent for months together, which may be distinct. 
