122 EXPLANATION OF 



Pigs. 48-57. The Development of the Campanulate 

 Polype, — Campanularia geniculata. 



N.B. All the figures (except fig. 48) are taken 

 from the celebrated memoir of Loven on this sub- 

 ject. (Wiegmann's Archiv für Naturgeschichte, 1837. 

 Tab. VI.) 



Fig. 48. A specimen of Camjpanularia geniculata slightly 

 magnified. It constitutes a whole colony of indi- 

 viduals, of somewhat different aspects, and consisting 

 of several generations ; first appear individuals of 

 the form a aa; they occupy the summits of the 

 branches, and ehcit afterwards the larger individuals 

 of the form b b b, which are always situated in the 

 axillae of the branches. Within, the second form 

 (the " nurses'') is hatched the third and more perfect 

 form ccc, which is smaller and globular, and which 

 in a short time is to be seen placed upon the indi- 

 viduals bbb, whilst the young proceeding from their 

 ova, make their escape. 



Figs. 49-57. Highly magnified, show the relatione between 

 the various forms (generations) of the individuals. 



Fig. 49. A magnified full-grown individual of the first 

 generation — a "parent-nurse" {grossamme) as I term 

 it — with a branch growing out of it. 



Figs. 50, 51. Represent two periods of the successive de- 

 velopment of a polype of the same generation, at 

 the extremity of the branch, or of the stem. 



Fig. 52. A highly magnified individual of the second 

 generation (" nurses," ammen) ; on one side of the 



