Subject ASC0000dv9
The Intellectual observer.
v.10 (1867), Page 251 (1867)
Harvard University, MCZ, Ernst Mayr Library
BHL Page 39470273
Keywords
shell Mantell lower chalk Sussex School of Mines rim shell-wall lower valve Mant. Lower Chalk outer edge inner edge dischotomous impressions shells structure of shells design fossil ridist Radiolites Mortoni Lower Chalk geology Shell structure