NOTOMMATAD A. 47 
certainly right in distinguishing them. Quite accidentally I have had the two in sight 
at once, side by side, yet without the slightest mutual recognition, and thus had facilities 
for comparison. A¥qualis has the body longer and slenderer, more taper, where 
longiseta is gibbous, less divided into apparent joints by constriction, especially at the 
foot, besides the co-equality of the toes in this. Yet, on the other hand, the gibbosity 
of the former nearly disappears when extended in swimming, and then they are much 
alike. 
I first saw this species together with F’. longiseta, and both in some plenty, in water 
from Woolston, in September 1885. Though the species showed no association, their 
manners were exactly the same. The springs made by both and by Scaridiwm, with 
which they have apparent affinity, depend, doubtless, on the length and elasticity of the 
toes : and suggest a certain relation to the 7’riarthrade, and even to the order Sctrropopa, 
in which, toes being wholly wanting, the same function is performed by special limbs, 
long, taper, and elastic.—P.H.G.] 
Total length, about ;},°inch. Habitat. Woolston (P.H.G.). 

Genus EOSPHORA, Ehrenberg. 
[GEN. CH. Body oblong; head dilated and furnished with protrusile auricles ; 
foot very distinct, with telescopic joints, and furcate toes ; eyes three, viz. one large, cer- 
vical, two minute, frontal. 
Of the four species which Ehrenberg includes under this genus I know but the one 
which he has not catalogued in its proper place, but which he subsequently mentioned 
under the head of Diglena awrita. His words are: ‘‘ Dr. Werneck sent me a drawing 
of a new Hosphora, very like the Diglena of Berlin. I found, soon after, in the Berlin 
animal, a pale red point on the opaque sac in the neck, which makes this an Hosphora, 
if it prove to be an eye’’ (‘‘ Die Inf.” p. 444). 
Judging by this species, there is little to distinguish Hosphora from Notommata 
(proper), except the two minute frontal eyes ;! and this distinction is evanescent, when 
we remember in how many species of Notommata Herr Eckstein has seen frontal pig- 
ment-specks. Yet, looking at the form of the trophi, I consider it intermediate between 
Notommata and Diglena.—P.H.G.] 
EK. aurita, Hhrenberg. 
(Pl. XVII. fig. 14.) 
Diglenaaurita . : . ) 
Eosphora aurita a all 
ey 3 : ‘ ci Z Gosse, Pop. Sct. Rev. 1863, vol. ii. p. 475, pl. xx. 
Ehrenberg, Die Infus. 1838, p. 444, Taf. lv. fig. 2. 
[SP. CH. Body cylindric; head separated by a neck ; front slightly convex ; brain 
an opaque globe at the end of a long slender tube; trophi forcipate ; foot slender, 
cylindric ; toes slender, acute, furcate. 
This is an attractive species: its form is elegant and symmetrical, particularly when 
the auricles are everted above the neck; the slender foot and toes well finish the body 
behind; and the prevalent depletion of the viscera with bright pellucid green food, add 
brillianey of colour to the clear glassy vase. To the naturalist, too, it is specially 
interesting. Far down in the body is a transparent ball, filled with opaque matter, 
whence a slender tube extends right up the very front: this tube is more or less turbid 
with like matter. On the ball just where it contracts to the tube is a broad and thick 
' The frontal specks Dr. Leydig denies to be eyes, in the species awrita ; but I have no hesitation 
in pronouncing them to be strictly analogous with what we call eyes throughout the class. 
