62 



examples of this class. Among blossom-diagrams we draw attention 

 . - . ^ to the corolla of Campanula medium, and of 

 Platycodon grandiflorus , both in fig. 69. 

 Other instances are the diagrams of Carduus 



Fig. 67. 



I 'Fruit of 







Ceiba pentandra. 



Fig. 68. 

 Fruit of Adansonia Baobab. 



crispus, of Cucurbita pepo, of Hedera helix, etc. 

 Among the lower animals the most beau- 

 tiful instances of this symmetry-class are 



found in the Blastoidea, some of which are reproduced in fig. 6 p 



on Table 7 (p. 65). The lime-armour of 



Orophocrinus stelliformis (fig. p), of Pen- 



tremites orbignyanus, (fig. 8) of Phaeno- 



schisma acutum (fig. 7), and that of 



Fig. 69. Blossom-diagrams of 

 Campanula medium and 

 Platycodon grandiflorus. 



Asteroblastus stellatus (fig. 6) are, accor- 

 ding to Haeckel's drawings, splendid 

 illustrations of this kind. Finally we must 

 not forget the wellknown forms of the 

 starfishes, e. g., Asterias ruber (fig. 70), as they are found along 

 our sea-shores. 



The symmetry of the group C V 6 is also met with very often in 



Fig. 70. 



Asterias ruber. 



