ANURAMADA. 127 
have an eye which has every appearance of being a coalesced pair. The extruded egg 
is carried on the ventral surface just above the hind spine. 
Dr. Kellicott discovered this fine Anwrea in Niagara water at Buffalo, and soon after 
Mr. Levick found it in Olton reservoir. I am indebted both to Mr. Levick and Mr. 
Dunlop for many living specimens, and to Mr. Levick also for several mounted. 
Length. Total, ~, inch; of longest spine, ;}, inch. Habitat. Buffalo, U.S. 
(Dr. D. S. Kellicott) ; Birmingham (Mr. J. Levick) ; Greenock (Mr. M. F. Dunlop). 
N. THALASSIA, Gosse, sp. nov. 
(Pl. XXIX. fig. 2.) 
[SP. CH. The two lorica-plates commensurate ; dorsal arched, long-ovate in out- 
line ; ventral, with pectoral edge straight. Marine. 
The antlers and lateral spines are moderate, nearly straight and sub-equal: the 
intermediate pair mere tubercles. The pectoral edge has no conspicuous unevenness. 
The lorica is scarcely changeable in outline, as if it were stiff and unyielding. Yet the 
shelly substance merges so insensibly into thin and evanescent membrane at the hind 
end (where a very delicate membrane, like a truncate tail [rectwm ?] is protruded), that 
we cannot determine the point of transition. The form and lobes of the front, and the 
array of fan-like sete; the brain and great eye; the mastax and jaws; and the 
abdominal organization, do not notably vary from what we see in Anurea. The broad 
protrusile and retractile membrane at the cloaca excretes mucus for temporary anchorage. 
One which I saw forcing its way through thick clusters of diatoms, emerged with several 
of them glued to its rear, which were then detached with some difficulty. In free 
swimming it is headlong and rapid, and very restless. In one example the intestinal 
canal was full of the frustules of diatoms. It is exclusively marine —P.H.G.] 
Length, ;1, inch. Habitat. 'Tide-pools im the Firth of Tay (P.H.G.) ; common. 
N. scapHa, Gosse, sp. nov. 
(Pl. XXIX. fig. 1.) 
(SP. CH. Lorica nearly as broad as long ; dorsal plate greatly exceeding the ventral 
in width ; pectoral edge sinuate. Marine. 
The transverse outline is highly rounded, resembling the half of an egg-shell, far 
within the margins of which a flat (ventral) plate is fixed across the cavity, leaving wide 
overhanging edges. The lorica is very flexible, so that, when the fore-parts are forcibly 
retracted, the dorsal outline suddenly appears perfectly circular, except at its spinous 
front edge, and then bears much resemblance to that of a Brachionus. The cloacal 
orifice is a very short and thin fissure at the extremity, and does not extend sensibly up 
each side. 
In swiftly swimming, the wide but thin wing-like expansions of the dorsal plate are 
very conspicuous by their glassy clearness, and by their peculiar form, especially when 
seen end-wise ; and this gives a very distinct aspect to the species, which is more than 
usually attractive. When alarmed it suddenly retracts with a snap; and if it happens 
to be presented sidewise at the moment, the frontal spines close with the sinuous pectoral 
edge, so as to cross and interlace. I saw one eagerly feasting on an Actinophrys, and 
watched it for half-an-hour. At first the frontal cilia worked energetically at it, gradu- 
ally drawing it into the open front of the lorica, and holding it there. But the jaws 
were not applied to it; and it seemed as if the ciliary action alone were drawing off 
invisible gelatinous juices into the buccal funnel. Yet, when at length the Notholca 
relinquished its hold, the prey seemed uninjured. The species has been sent me by Mr. 
Hood, associated with the preceding, in sea-water from the estuary of the Tay. — P.H.G.] 
Length, ,}, inch. Habitat. Firth of Tay (J.H.). 

