PLATE XII. 



PAGB 



Fig. 60. Ostrea Tatloriana. Natural size. 34 



60 a. Side view. 



Fig. 62. Terkbratki.la Whitnkyi. Natural size. 35 



62 a. Side view. 



Notk. — This species was originally supposed to be Tertiary; but investigations 

 since the text was printed, develop the fact that it belongs to the Lower Cretaceous. 



Fig 63. Morrisia Hornii. Highly magnified. 36 



Fig. 64. Clypeaster Gabbii. Natural size. 36 



64 a. Longitudinal section. 



Fie;. 65. Kchinarachnius Brewertanus. 36 



Very slightly magnified. 



65 a. Longitudinal section. 



