STUDIES ON EARTHWORMS. 233 
Horst (81) has described a Pericheta from Java. Length 
120 mm., consisting of 100 somites. The spermathece are 
four pairs in somites vi, VII, vitI, and 1x, with their pores ante- 
riorly. ach consists of a large ovoid sac with a neck, into 
which opens the duct of a much smaller, rather conical sac. 
The male pores are situated on papille, but no other 
papille are present. In other respects, it has the usual Peri- 
chetal structure; but in somite x (in three individuals) there 
was, on the left side, an unpaired blood-vessel passing from 
the dorsal to the ventral trunk. 
In 1883 Horst described (34) nine Earthworms belonging to 
Schmarda’s genus Pericheta, but he uses Templeton’s name 
of Megascolex as having a priority. As they all appear to 
have a continuous ring of sete in each somite, and no 
deficiency in the dorsal mesial line, mentioned by Templeton 
for his worm (20), it seems confusing to change the names: 
accordingly, in the list at the end of this section I have placed 
them in the genus Pericheta. 
M. indicus, from Sumatra, may, according to the author, 
be the same as Schmarda’s Pericheta cingulata. 
M. sumatranus has the male pore, as usual in this genus, 
on somite xvi1I, but here placed in a slight pit surrounded by 
a plicated wall. 
M. Hasseltii, from Sumatra, has the sete on each side of 
the ventral mid-line placed closer together than elsewhere in 
the ring of sete. 
M. Sieboldii, from Japan, and M. musicus, from Java, 
have six pairs of intestinal czeca in somite xxvi. Horst further 
describes M. capensis, from the Cape of Good Hope, and 
M. annulatus, from the Malayan Archipelago. 
Hutton has described (385) two species of Baird’s Megas- 
colex (that is, Schmarda’s Perichzta) with a continuous 
ring of setz in each somite, from New Zealand. 
M. sylvestris differs from all other species of the genus in 
having the male pores on somite xx; there are sixty sete 
round each somite, which are arranged in thirty couples. 
M. lineatus has a continuous ring of sete in each 
