TABLE IV. — Genealogy of the Arietidae in the Basin of England, after Wright and various Collections. 



NOTE. W. = Wright, nnd B, = Blak 



Vr- M.. !..r.elh ( 



- Ariet, nodotianu- W 



-Amal. '■ W. 



- JKpoc Mgittariun 

 (pars) V 



nm. SmithiSow 



Wgulatus Zone 



= Mftw " W 



-^qc. " W. Same 



Ariet. d iff oralis B 

 | (para) W 



= Ariet. Craaai W. 





= jKroc. laquenlns \Y 



-=JEgoc. " W. ^Ggoc. intermedium 



- Belcheri ipars) W I (pars) W. 



PaU. planorbe w. levc 

 JEgoc W 



-I'sil plannrt.e v;ir plir 



| » See Wright's Plates, pi. 6. flg* 2 and 3. 



— * The linee hiiiihti my i!im Hpi" !■■- "f Arriiijcerua nulicuti 



genetic bondi only En a very general way The true succes 

 sion of the forma is noi given in (hi- pari of thii table 



