312 THE AMERICAN NATURALIST. . (VOL XXXVI. 
somite unprovided with parapodia of the usual form was dis- 
covered. A recent study of S. ramosa by Oka! has brought 
out the interesting fact that the paired buds arise, not from 
one of the original somites, but from a newly developed, inter- 
calated somite, which differs from all the others in lacking para- 
podia. Oka is doubtless right in regarding it as non-homologous 
with the other somites, 
While the stolons of Autolytus and of syllidians generally 
are distinct and complete individuals provided not only with 






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sexual, sensory, and locomotor organs, but with those subserv- 
ing nutrition, circulation, and excretion, the sexual buds of 
T. ingens, and even more ‘strikingly 7. gemmipara, exhibit a 
higher degree of specialization in lacking functionally developed 
vegetative organs. The zooid is therefore quite as incapable 
of leading a prolonged independent existence as the famed 
Palolo of the South Seas. It is no more than a living engine 
for the dissemination of the genital products which it carries, 
t Oka, Asajiro. Ueber die pierce bei ees ramosa, Zoilogical 
Magazine, Tokyo, vol. vii (1895), p. 117. 

