Dave-nport. — Buddiug in Bryozoa. 



PLATE IX. 

 ABBREVIATIONS. 



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 tiie two layers of this region and the origin of the 

 polypide. X 410. 



Young regenerating polypide of Flustrella kispida. The section passes 

 through the sagittal plane. X 380. 



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

 origin of polypide. X 410. 



Sagittal section through 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 tlieir 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 tiie rectal pocket (rt.) to the atrio- 

 pliaryngeal cavity above. X 410. 

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

 cesophageal nerves («.') growing around oesophagus (as.). X 410. 



