CYTHERELLA. 



67 



3. Elliptical (broad); with pit. Cytherella Muensteri, Roemer, 1838; 



Bosquet, 1852. (The published figures vary) 



4. Elliptical (broad); with pit. Cytherella nitida, G. S. Brady, 1869 



5. Elliptical and oblong; with pit. Cytherella Beyrichi, Reuss, 1851 ; 



Bornemann, 1855; Speyer, 1863; G. S. Brady, 1866. (The 

 published figures vary) . 



6. Elliptical ; with anterior border. Cytherella ? grossefoveolata, 



Giimbel, 1871 



7. Oblong; with pit. Cytherella punctata, G. S. Brady, 1866 



8. Oblong (broad), but tapering. Cytherella intermedia, Bornemani 



1855 ..... 



9. Oblong (broad). Cytherella compressa, 1 Miinster, 1838; and 



varieties Beyrichi and intermedia, Jones, 1856. (The pub 

 lished figures vary) .... 



10. Oblong. Cytherella semitalis, G. S. Brady, 1868 



11. Oblong. Cytherella ? aciculata, Roemer, 1838 



12. Oblong (narrow). Cytherella? asperula, Reuss, 1S45 . 



13. Oblong, pinched; with faint pit. Cytherella transversa, Speyer 



1863 ..... 



Tertiary. 

 Recent. 



Recent and 

 Tertiary. 



Trias. 

 Recent. 



Tertiary. 



Tertiary. 

 Recent. 

 Tertiary. 

 Cretaceous. 



Tertiary. 



I. Surface even. C. Surface reticulate and foveolate. 

 Outline subovate or sub-oblong ; profile cuneiform. 

 1. Oblong. Reticulate. Cytherella venusta, G. S. Brady, 1880 . Recent. 



2. Oblong. Foveolate. Cytherella cribrosa, G. S. Brady, 18 SO 



Recent. 



1. 



2. 

 3. 



4. 

 5. 

 6. 



7. 

 8. 

 9. 



10. 



II. Surface uneven. A. Smooth. 



1869 



Suboblong. Cytherella cingulata, G. S. Brady 

 Suboblong. Cytherella crepidula, Blake, 1876 

 Oblong (broad). Cytherella Williamsoniana, Jones 1848 (=? ser 



rata, Wills.) .... 



Oblong. Cytherella auricularis, Bosquet, 1847 and 1854 

 Oblong. Cytherella cavernosa, G. S. Brady, 1868 

 Oblong. Cytherella leioptycha, Reuss, 1850 

 Oblong. Cytherella Ulmensis, Giimbel, 1871 

 Oblong; with pit. Cytherella hieroglyphica, Bosquet, 1852 

 Oblong; with pit. Cytherella denticulata, Bosquet, 1854 

 Oblong; slightly uneven. Cytherella truncata, G. S. Brady, 1869 

 1 See note on this species in the ' Geol. Mag.,' vol. vii, 1870, p. 15! 



Recent. 

 Lias. 



Cretaceous. 



Cretaceous. 



Recent. 



Cretaceous. 



Jurassic. 



Tertiary. 



Cretaceous. 



Recent. 



