380 MR. F. E. BEDDARD ON THE [June 18, 
8 PeERICHETA INTERMEDIA, N. sp. 
The prostomium does not divide the buccal segment. 
The sete form anearly complete ring round each segment, failing for 
a short space in the mid-dorsal and mid-ventral lines. 
Dorsal pores absent. 
Clitellum ? 
Alimentary tract. The gizzard lies in segment v.; it is small and 
inconspicuous. ‘The calciferous glands present the appearance of 
dilatations of the cesophagus in segments x. and xi. 
Nephridia are a series of paired tubes, opening by laterally placed 
orifices. 
Sperm-sacs in segments ix., X., Xi., Xl. 
Vasa deferentia open on to segments x. and xi. 
The atrium is tubular as in Acanthodrilus ; it is not furnished with 
a sac of penial sete ; the vas deferens of each side appears to open in 
common with it. 
Intersegmental septa separating segments vili—xv. very greatly 
thickened. 
Receptacula ovorum are conspicuous on the anterior septum of 
segment Xiv. 
Spermathece four pairs in segments v.—viii.; each is furnished with 
a minute diverticulum lying to the inner side. 
9. PeRICHzZTA ANTARCTICA (Baird). 
Magascolex (Pericheta) antarctica, Baird, Journ. Linn. Soe. 
vol. xi. p. 96. 
P. antarctica, Beddard, Proc. Roy. Soc. Edinb. vol. xiv. p. 175. 
Genus Nropriwuvs, F. E. B. 
Neodrilus, F. E. Beddard, P. R. Soc. Edinb. vol. xiv. p. 157. 
Closely resembling Acanthodrilus, but differing in the presence of 
only a single pair of tubular atria in segment xvii. and a single pair of 
Spermathecz in viii. Each spermatheca is furnished with a very large 
diverticulum lying in the anterior segment. Nephridia paired and 
alternate in position. 
10. NropriLus monocystis, F. E. B. 
N. monocystis, F. E. Beddard, P. R. Soc. Edinb. vol. xiv. p. 157. 
RHODODRILUS, nov. gen. 
Setze in 8 series. Clitellum occupying segments xiv.-xvii.; atria 
tubular ; penial setee present; vasa deferentia opening on to the 
exterior on the same segment (xvii.), but independently of atria ; 
gizzard present. 
This genus comes near to Cryptodrilus and Megascolides, and 
possibly includes some species described by Fletcher (5) under these 
two genera. In the former genus I place those species with lobate 
atria like those of Pericheta; Megascolides includes species which 
have tubular atria, no penial sete, and a clitellum extending as far as 
segment xx. or further. 
