XVU1 



EXPLANATION OP THE FIQUEES. 



Fig. 



a pedicle ; h, i, separation into 

 segments; da segment become 

 free; k, form of the adult. 



[Sars 



367 Portion of a horny sheathed 



polyp (Campanularia) : a, 

 cup, which bears tentaculae ; 

 fc, the female cell, containing 

 eggs ; c, the cells in which the 

 young are nursed, and from 

 which they issue . Steenstrup 



368 The young of the same, with 



its ciliated margin, magnified. 



369 Transformations of the canker 



worm (Geometra vemalis) : 

 a, the canker worm ; b, its 

 crysalis; c, female moth; 

 d, male moth. . Agassiz 



370 Metamorphoses of the Duck- 



barnacle (Anatifa); a, eggs 

 magnified ; b, the animal as 

 it escapes from the egg ; c, 

 the stem and eye appearing, 

 and the shell enclosing them ; 

 d, animal removed from the 

 shell, and further magnified ; 

 e,f, the mature barnacle af- 

 fixed by its pedicle . Ibid. 



371 Metamorphoses of a star-fish 



(Eckinaster sangidnolentus), 

 showing the changes of the 

 yolk, e ; the formation of the 

 pedicle, p ; and the gradual 

 change into the pentagonal 

 and rayed form . . Ibid. 



372 Comatula, a West Indian spe- 



cies, ia its early stage attached 

 w a ivsoi . . Agassiz 



i Fig. 



I 373 The same, detached and swim- 

 ming free . . . Ibid. 



374 Longitudinal section of the stur- 



geon, to show its cartilaginous 

 vertebral column . Ibid. 



375 Amphioxus, natural size, show- 



ing its imperfect organiza- 

 tion .... Ibid. 



376 Section of the earth's crust, 



showing the relative position 

 of the rocks composing it. 



[Agassiz 



377 Fossils of the Palaeozoic age. 



[Murchison. 



378 Homalonotus delphinocephalus. 



[Konig 



379 Pterichthys . . Miller 



380 Coccosteus cuspidatus . Ibid. 



381 The Flora of the coal period. 



[Richardson 



382 Foot-prints of birds . Ibid. 



383 Plesiosaurus rugosus . Owen 



384 Pterodactylus crassirostris. 



[Goldfuss 



385 Jaw of the Thylacotheriwn, 



magnified. . Richardson 



386 Fossils, shells, and Hemicidaris 

 \ from the oolitic rocks. 



[Phillips 



387, 388 Fossil shells from the 

 greensand strata of the Isle of 

 Wight . . . Mantell 



389 Fossil shells, and Mammalian 



remains, from the locustrine 

 tertiary strata of the Isle of 

 Wight, to illustrate the fauna 

 of that period . . Ibid. 



390 The Megatherium. 



[Pander and D'Alton 



