350 
F. E. Frit sell. 
rounded anterior end and a small pointed process (2-3/x long) at the 
posterior end. The periplast is provided with coarse and densely 
placed spiral markings, running rather steeply from the hack to the 
front end, and exhibits a slightly yellowish tinge. Two large oval 
paramylon-bodies, with their edges slightly overlapping, are situated 
symmetrically, one on each side of the organism. Each paramylon- 
body is slightly drawn out in the transverse plane and takes the 
form of a thick ellipse, the long axis of which is partly occupied by 
a narrow slit; in other words, the paramylon-bodies resemble thick- 
Fig. 3. A-E, species of Lcpocinclis. A, B and E, L. scilina n. sp. A, the 
periplast only ; B, drawn from a living individual; E, view of periplast from 
the posterior end, showing the spiral striation. a, aperture in periplast; l, the 
superficial groove; n, nucleus; s, eye-spot. C and D, L. ovum (Ehrenb.) 
Lemm., var., to show the shape of the paramylon-bodies (p) ; C in optical 
section, D, from the surface. F and G, Clirysococcus tcsselUitus n. sp. F, side- 
view ; G, view from the front end, showing the cilial aperture and the chloro- 
plast. a, cilial aperture; l , leucosin ; p, chloroplast. (A, C, D and E x 800; 
B x 650 ; F and G x 700). 
walled rings which have been compressed, so that the central hollow 
is no more than a slit (cf. Fig. 3, D). As a consequence the cell 
when viewed in optical section (in the antero-posterior plane, Fig. 
3, C), appears to possess four small paramylon-bodies, two on either 
side, and the true state of affairs is only determined by careful 
scrutiny. The numerous small chloroplasts, customary in the 
species of Lepocinclis , were distinct, but, since only preserved 
material was examined, no other details of the cell-structure could 
be observed. The form just described differs from the figure of L. 
