TRANSACTIONS OF MICROSCOPICAL SOCIETY. 
DESCRIPTION OF PLATE V, 
Illustrating E. Ray Lankester^s paper on the Gregarinida. 
Fig. 
1- — An unusually large Monocystis Tjumbricorum of the circular form, from 
the posterior extremity of the visceral cavity of L. terrestris, 4z th inch 
in diameter. 
2. — An unusually large M. Lumbricomm of the elongated or linear form, from 
the seminal vesicle of a specimen of L. terrestris, in which all the 
genitalia were occupied by such forms, ^th of an inch in length. 
3. — Nucleus or vesicle of the individual drawn in fig. 1. 
4. ^.—Monocystis pellucida, Kolliker, adult specimens, which are not pellucid, 
showing the extensive development and apparent fibrillation of the 
sarcodic envelope. 
6, 7. — Forms of Monocystis {M. Nemertis, K611.?) met with abundantly in 
Ommatoplea and Convoluta and once in Aphrodita hystrix. 
8. — Monocystis Cirrhatuli, n, sp., a large form abundant in the perivisceral 
cavity of C. borealis, 
9. — Young individual of M. Cirrhatuli. 
10. — Monocystis Eunic^e, n.sp., from intestine of E. Ilarassii, 
11. — Monocystis Terebellce, Kdlliker, from Terebella nebulosa. 
12. — Monocystis Phyllodoc(S, a form differing considerably from that described. 
by Claparede. 
13. — Somatic granules from M. Lumbricorum, 
