PLATE XIII. 



BUDDING. 



Figs. i6i — 1 8 1. — C. dodccalophus. 

 Figs. 182 — 185. — C. sibogae. 



Ficrs. 161 — 163. C. dodecalophiis. — Consecutive sections through the base of an old stalk, transverse to 

 its long axis, with a young bud {b.). 



Fig. 164. — Sagittal section through base of an old stalk, shewing a very young bud (/;.') and the base 

 [br) of the bud shewn in fig. 165. 



Fig. 165. — More median sagittal section of b? in fig. 164. 



Ficrs. 166 — 172 are from an obliquely sagittal section of an old stalk, and are all drawn in the same 

 relative position. Figs. 169, 172 shew the stalk, with its much wrinkled epidermis, and parts of 

 the two buds b.\ b}. The younger bud (1^.') is further shewn in figs. 166 — 168; and the older 

 one in figs. 170, 171. 



Figs. 166 — 168 are frontal sections of the bud b} in figs. 169, 172. Fig. 166 is through the proboscis; 

 fig. 167 is through the proboscis and collar; and fig. 168 is through the metasome. Fig. 172 

 shews the metasomatic cavities passing through the epidermis of the parent-stalk. 



Fig. 169. — Obliquely sagittal section of old stalk, with the two buds {b}, b.-). The section of /?.' is 

 between fig. 168 and fig. 172: that of b.^ is between fig. 170 and fig. 172. 



Figs. 170, 171 are frontal sections of the bud /;.- in figs. 169, 172. Fig. 170 is at the bend of the alimentary 

 canal; fig. 171 is nearer the dorsal side: — inf., intestinal limb of alimentary canal. 



Fig. 172 is through the edge of the basal sucker (d.) of the stalk, and it follows fig. 169. 



Figs. 173, 174. — Two sagittal sections of a moderately old bud. 



Figs. 175 — 177. — Three sagittal sections of a young bud, with part of the parent stalk. 



P'igs. 178 — 180. — Three obliquely sagittal sections of an older bud, which has just begun to develop its 

 first pair of arms. 



Fig. 181. — Median sagittal section of an advanced bud. 



Figs. 182 — 185. C. sibogae. — Obliquely sagittal sections of an advanced neuter bud. 



Fig. 182. — The pleurochordal groove (//.), the histological characters of whose walls are not yet fully 

 differentiated, appears to be separated from the rest of the pharyngeal cavity by one of the dorso- 

 lateral epithelial ridges seen in PI. VIII, figs. 90—92. In the sections before this one is reached, 

 the right gill-slit communicates with the anterior end (g.s.) of this groove. The cells lining the 

 pharyngeal diverticulum {dn'.) are much vacuolated: — b.c.'r., right collar-cavity. 



Fig. 183. — Through the other dorsal half of the collar-cavity [b.crl.]: — p.p. internal opening of left 

 proboscis-pore. 



Fig. 1 84. — Passing to the left of the mouth, hut shewing the right gonad-rudiment (g.). 



Fig. 185. — Through the external opening of the left gill-slit {g.s.e.) and collar-canal [c.c.e.). The rectum 

 (;-.) already contains faeces. The beginning of the wall of the stomach (st.) is cut tangentially. 



[The figures iverc all draiun zvitk ZEISS, DD Obj. and reduced -j^]. 



