252 FRANK E. BEDDARD. 
of sperm-ducts. As to the latter point, I have discovered that 
in Sutroa the second pair of sperm-ducts are much thinner 
than the first pair, and that coincidently with commencing 
disappearance (?) of one of the two pairs of sperm-ducts the 
testes belonging to the vanishing pair are absent. In my genus 
Phreodrilus? there is a cecum of the sperm-duct, which is 
possibly a still further reduced condition of a second pair of 
sperm-ducts. Among the higher Oligocheta the absence of 
one pair of testes and of the corresponding sperm-duct is not a 
matter upon which great weight is usually laid. In any case it 
appears to me that Alluroides shows no marked affinities to 
any other family of worms. 
Alluroides, gen. nov. 
Setz simple, S-shaped, arranged in pairs; clitellum occupy- 
ing Segments x11I—xv1, consisting of a single layer only of 
cells; alimentary canal without a gizzard or any appended 
glands ; some of anterior septa thickened ; testes, one pair in 
X ; sperm-ducts open on to exterior on x111 through a moderately 
long atrium, which has much the same structure as in the 
genus Moniligaster; above the apertures of the atria is a 
process of the body-wall (a penis?) ; ovaries in x1; ripe ova of 
large size, and filled with yolk, occupy five or six segments of 
the body; oviducts open on to Segment xiv; spermatothece, 
one pair, without diverticula, in viii. 
The genus contains one species, Alluroides Pordagei, of 
which I shall not attempt a definition. 
1. Gordiodrilus zanzibaricus, n. sp. 
A large number of specimens of this species were collected 
from damp mud at the edge of a pool. They are, when 
preserved, an inch or so in length. Their colour during life 
was red. 
1“ A Contribution to the Anatomy of Sutroa,”’ ‘Trans. Roy. Soc. Ed.,’ 
vol. xxxvil, p. 195. 
2 « Anatomical Description of Two New Genera of Aquatic Oligocheta,” 
‘Trans. Roy. Soc. Hd.,’ vol. xxxvi. 
