STUDIES ON BARTHWORMS. 235 
Ty. orientalis is ten inches long, and one third of an inch 
broad, and is cylindrical throughout. The sete are in four 
couples, and are all on the ventral surface. The clitellum 
occupies somites XIV, XV, Xv1, xvi1. The male pores are in somite 
xvit, close together, on a flattened area. They are in a line 
with the ventral couples of sete. Copulatory papille are 
present behind and in front of the male pores, on the inter- 
segmental grooves (as in Pontodrilus). . 
In somite xviii is a delicate sac containing modified penial 
sete. 
There is only one pair of spermathece, and they are in 
somite vi11. There are five pairs of lobed glands, lying above 
the dorsal blood-vessel, about the middle of the intestinal 
region. Nephridia were observed only in the somites anterior 
to the clitellum. 
In 1884 Mr. Beddard mentioned in ‘ Nature’ (38), and sub- 
sequently at the Zoological Society (39), that he had received 
a gigantic Earthworm from the Cape of Good Hope, for which 
he proposed the name Microcheta. I shall describe below 
two specimens apparently belonging to the same species. 
In 1884 Horst described two species of Acanthodrilus 
from Liberia (43), A. Schlegelii, and A. Buttikoferi. 
In 1885 Beddard described some anatomical points observed 
in some species of Acanthodrilus from New Zealand (40), 
where the dorsal blood trunk is double, and where there are 
eight nephridia to each somite (41), one corresponding to each 
seta; and another species where there are two alternating series 
of nephridia (42). Beddard also describes Ac. capensis 
(40) where the setz are in four couples anteriorly, but separated 
posteriorly ; he here, for the first time in this genus, finds 
the ovary in somite x11, and the oviduct with its pore in somite 
XIII. 
