1922 



TYPE A MMOM TES—I I 



CCCXLIIIa 



Ammonites giganteus 



Barrel Hill, Long Crendon, Bucks ; Portl. ; S.B. Coll. 3224 



S. 3bo, ^2, 2q, 45 ; Oij. 31. 27, 4b ; 52 ribs ; max. c. 620 



Body-chamber with part of mouth. Li, c. 50 ; L2, c. 36 per cent, at 114 



TROPHOXITES IMPERATOR, nov. 

 Gigantitan, Trophonitcs ; Holotvpe. See CCCXXV 



