SOME ABNORMAL ANNELIDS. 451 
the ventral terminal will often produce active crawling or even 
swimming, such a touch often causes the dorsal terminal merely 
to shrink without setting up any locomotion in the entire 
animal. 
Sections show that there is a complete bifurcation of the 
digestive tract, so that the small ventral terminal has an anal 
opening that communicates with the main intestine, while the 
dorsal terminal is also provided with a branch of the intestine 
proceeding towards the wanting anal piece. 
The large dorsal terminal contains much sperm or masses of 
nearly ripe sperms, and the trunk as well as the small terminal 
contains male cells. The nerve-cord continues from the main 
trunk directly down into the ventral terminal, and so out to its 
anal tip. A normally developed nerve-cord is present in the 
dorsal terminal, but there it ends abruptly without any trace- 
able connection with the nerve-cord of the trunk. 
We meet here again the same peculiar condition found in A, 
B, and C, and have an explanation for the differences observed 
in stimulating one or the other of the terminals: the dorsal 
one has an interruption in its nervous connection with the 
anterior part of the body, and hence when stimulated does not 
readily set up movement in that part of the body. 
Sections of this region show the same anatomical relations 
as are indicated in fig. 12. 
The individual X was a large ripe female, found among 
several hundred adults taken at different times in July. Being full 
of ripe eggs the body readily ruptured, and was not studied alive. 
An examination by section showed that the eggs and ovaries 
fill not only the main trunk, but also both terminals. 
Of the two terminals the smaller one arises as a lateral out- 
growth from the right, much as in fig. 13. It is, however, 
much larger than in that specimen, though shorter and 
narrower than the main terminal. 
It springs from the right side between the parapodia of the 
29th and 380th somites, which it forces widely apart. At first 
turned outward, it then bends backward, so as to lie more 
nearly parallel with and dorsal to the main terminal. It is 
VOL. 36, PART 4,—NEW SER. HH 
