xin EXTENSIONS OF DARWINISM 269 



105), while others, as Professor Judd remarks (in a letter), 

 " before finally disappearing, twisted and untwisted them- 

 selves, and as it were wriggled themselves into extraordinary 



FIG. 103. MACROSCAPHITES IVANII. Cretaceous. 



FIG. 104. HAMITES ROTUNDUS. Cretaceous. 



FIG. 105. PTYCHOCERAS EMERICIANUM. Cretaceous. 



FIG. 106. ANCYLOCERAS MATHERONIANUM. Gault. 

 Late Ammonites. (From Nicholson's Palaeontology.) 



shapes, in the last throes of dissolution." These strange 

 forms (Figs. 96-106) are reproduced from Nicholson's 

 Palaeontology, and there are many others. 



