358 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



The plane of division tends to pass through at least one 

 siphonoglyph. There is no apparent relation between the 

 process of division and the number and position of the 

 mesenteries. 



Laceration may be due to unfavorable environmental con- 

 ditions. It may occur in dividing polyps. 



Buds arise from the oesophageal and foot regions. An 

 oesophageal bud may occupy any position relatively to the 

 siphonoglyph of the parent, and its siphonoglyph may be 

 independent of that of the parent. 



Both budding and fission may occur in the same colony. 



Variation in the number of siphonoglyphs is not corre- 

 lated with asexual reproduction. The monoglyphic and 

 diglyphic types are not of the value of varieties. 



That identical structures arise from quite different sources 

 by different processes is significant. 



It is hoped in a future paper to extend these observations 

 and add others on the origin and histogenesis of the bud. 

 rate of fission and bud formation, relation of budding to 

 fission, etc. 



This investigation was undertaken at the suggestion of 

 Professor W: E. Ritter, to whom I am further indebted for 

 many helpful counsels. 



Zoological Laboratory, University of California, 

 Berkeley, California, 

 July 1, 1898. 



