MONILIGASTER GRANDIS, A. G. B. 359 
spermathecal duct sometimes does and sometimes does not 
become embedded in Septum vii-viit before penetrating the 
body-wall. 
4 
Genus Moniligaster, Perrier, 1872. 
Prostomium never dovetailed into peristomium. 
Sete in four couples. 
Clitellum develops on Segments x, xI, X11, and XIJI; it is 
a transient structure, and does not extend over the interseg- 
mental grooves. 
Dorsal pores absent (? M. barwelli, M. beddardi). 
Nephridiopores usually in the direction of the outer seta 
couple, but in some cases more dorsally placed in certain of the 
anterior segments. 
Genital apertures, three pairs, all strictly intersegmental. 
Male pores between Segments x and x1. 
Oviducal pores between Segments x1 and XII. 
Spermathecopores between Segments vil and VIII. 
Testes, one pair, each enclosed in a sperm-sac; they belong 
to Segment Ix. 
Sperm-sacs, one pair, provided with vascular trabecule ; 
held equatorially by Septum 1x-x. 
Ciliated rosettes are specialised portions of the walls of 
the sperm-sacs. 
S perm-ducts very long and convoluted ; ciliated along their 
whole length. 
Atria, large muscular sacs. 
Prostates developed as glandular walls of the atria. 
Ovaries, one pair of frill-like bands in Segment x1, produc- 
ing enormous numbers of eggs, which, after further growth in 
the ovisacs, are placed in enormous numbers in the egg-capsule, 
and take the place of albumen in nourishing the one or two 
which develop.! 
1 [ have added this very interesting fact here because it is, in my experience, 
very characteristic of the genus; and I have examined the egg-capsules of 
three species of Moniligaster. I hope to give a fuller account of the phe- 
nomenon in a subsequent paper. 
