1923 



TYPE AMMOMTES—IV 



CCCXC 



Anaptychus 



PSILOCERAS PLANORBIS 



Aird nah Iolaire, The Wilderness, Ardmeanach, Mull, Scotland 



Lower Lias, dark shales. Bed 13 up ; Geol. Surw Scotland, M 332S/ra] 



Umbil. at 32-5, 41, at 43 and 57, 43-5 ; s, 76, 30, — , 44-5 



PSILOCERAS .EOUABILE, xov. 

 Caloceratan, ceqiiabile ; Holotype. See CCXXIII 



