Corrections 



Certain corrections have to be made, as follow : 



Index, Vol. vi. From this index the following items were 

 accidentally omitted : — 



i. Page 53. Ammonites baculatus . . dlxxxi 

 2. ,, 54. Baculatoceras . . . . dlxxxi 

 baculatum 

 baculatum dlxxxi 



Plate Legends. The following are revised readings : 



3. Vol. hi, PL CXXXIXa 



Ammonites biplex, Homceomorph of 



Cf. Perisp. sp., Siemiradzki, 1899, 256 ; [Shotover], " near Oxford " 



Kimmeridge Clay [=Ampthill Clay] ; J. W. Tutcher Coll. 



S. 90, 32, 30, 41 ; 146, 32 (30), 28 (26), 48 



DICHOTOMOCERAS DICHOTOMUM, S. Buckman, 1919 



Prionodoceratan, dichotomum ; Genotype, Holotype 



4. Vol. hi, PI. CXXXIXb 



Ammonites biplex, Homceomorph of 



Fig. 1, Left side of CXXXIXa, with much test, showing stout ribs 



bordering constrictions ; body-chamber from x complete ? 



Fig. 2, Peripheral view, ribs strong 



DICHOTOMOCERAS DICHOTOMUM, S. Buckman, 1919 



Prionodoceratan, dichotomum ; Genotype, Holotype 



5. Vol. iii, PI. CXXXIXc 



Ammonites biplex, Homceomorph of 



Fig. 1, Inner whorls of CXXXIXb, fine prorsicostae and constrictions 



Fig. 2, Periphery, 2 ribs not divided ; Figs. 3, 4, suture-line, nahtlobe 



short 



DICHOTOMOCERAS DICHOTOMUM, S. Buckman, 1919 



Prionodoceratan, dichotomum ; Genotype, Holotype 



6. Vol. iii, PI. CXXXIXd 



DICHOTOMOCERAS DICHOTOMUM, S. Buckman, 1919 



Prionodoceratan, dichotomum ; Paratype 



7. Vol. iii, PI. CXXXIXe 



DICHOTOMOCERAS DICHOTOMUM, S. Buckman, 1919 



Prionodoceratan, dichotomum, Paratype 



S. Vol. iii, PI. CLXXXIV 



DICHOTOMOSPHINCTES INGENS, Young & Bird sp. 

 Perisphinctean, antecedens (ingens). Cf. CXXXIX 



