THE HIGHER CRUSTACEA OF LIVERPOOL BAY. 245 
females taken with the electric light. The general cha- 
racters and the peculiar tridentate spinule at the extremity 
of the telson agree with Sars’ description. The. spines, 
however, on the inner edge of the inner uropods agree 
rather with those of S. crassipes, Sars, (from which species 
this differs in its longer limbs) in having no small spines 
between the larger, all being nearly equal in size and 
set closely together, except towards the extremity. A 
female examined had three sete on the inner margin 
of the last jomt of the peduncle of the upper antenne, and 
two sete on the distal extremity of that joint, which agrees 
with Sars’ figure. Length about 15 mm. from tip of an- 
tennal scale to tip of telson. 
2. Mysis ornata, Sars. 
In Report I., p. 221, I have erroneously seconted MM. 
spiritus ioeaian) for this species, which is not uncommon 
in Liverpool Bay. It may be known from M. spiritus by 
its short, thick eye-stalks, and by having only five joints 
in the tarsi of the anterior legs instead of seven to nine. 
3. Mysis neglecta, Sars. . 
This species is sometimes abundant in tidal pools in 
June and July. The colour varies trom the faintest tint 
of green (almost colourless) to dark olive-green. The 
greater number were grass-green., All had the peduncle 
and inner brauch of the upper antenne, the eyes, and tips 
of both branches of the uropods, golden-yellow. The 
fringes (setze) of the antennal scales and uropods were red- 
purple. A large living specimen, which was of the usual 
pale grass-green when taken out of the white dish in which 
it was swimming; placed in a watch-glass on a black glass 
plate, became in about an hour dark olive-green, while a 
smaller and almost colourless specimen lost what little 
colour it had. Some specimens were much infested on 
the head and thorax by an Lpzstylis. This species differs 
