Davenpokt. — Budding in Bryozoa. 



PLATE IX. 



ABBREVIATIONS. 



An. Anal side of polypide. In. gm. Lun-en of bud. 



Fig. 72. Longitudinal vertical section through the peripheral part of the corm of 

 Lepralia Pallasiana, showing the margin of the corm and two zooecia, 

 the older of which contains a polypide. X 160. 

 Fig. 73. Longitudinal vertical section through the margin of a corm of Lepralia 

 Pallasiana, showing the two layers of this region and the origin of the 

 polypide. X 410. 



Young regenerating polypide of Flustrella hispida. The section passes 

 through the sagittal plane. X 380. 



Vertical section through margin of corm of Flustrella hispida, to show 

 origin of polypide. X 410. 



Sagittal section tlirough young polypide of Flustrella hispida, to show 

 early stage of development of alimentary tract. X 410. 



Superficial view of young polypide from upper surface of corm of Flus- 

 trella hispida, showing young tentacles and their relation to the anus 

 (at atr.). X 320. 



Bud of polypide of Flustrella hispida at the time of closure of the pore of 

 invagination. X 390. 



Radial section through margin of corm of Flustrella hispida, showing bud 

 of polypide. X 410. 



Young polypide of Flustrella hispida. X 380. 



Bud of Lepralia Pallasiana immediately before the formation of alimen- 

 tary tract, showing relation of tlie rectal pocket (rt.) to the atrio- 

 pharyngeal cavity above. X 410. 

 Fig. 82. Section through polypide, through lately formed brain and circum- 

 oesophageal nerves (n.') growing around oesophagus (ce.). X 410. 



