buddtnct in pekophora 



George Lefevre , 



Although the phenomenon of budding in the group of 

 Tunicata has received the attention of numerous observers for 

 a long time, during the past twelve or fifteen years investi- 

 gation has been largely confined to the study of the process 

 in the pelagic forms, Salpa , Doli olMm, and Py rosom a . In the 

 Ascidians, hov/ever, our knowledge of the budding, until re- 

 cently, has been based almost entirely on the observations 

 of earlier workers. Among the latter, Kowalewsky, (12 and 

 IS) who studied the bud-development in Peroph ora, Didemnum , 

 and Amaroucium , Delia Valle (4) in Didemnum , Distaplia , and 

 Botry llus , and finally Seeliger (29) in Glavelina are espe- 

 cially prominent. 



Within the last two or three years, hov/ever, our 

 knowledge has been greatly enriched by the researches of Pi- 

 zon (22) and Hjort (8) on Botr yllus, and of Salensky (27) on 

 Distaplia . 



Although the observations of these investigators 



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