Figure 49 Silurian fossils. (Pteropod, A; cephalopods, B-D ; 

 trilobites, E-I ; eurypterid, /; ostracod, K) . A Tentaculites 

 gyracanthus, x2. B Kionoceras darwini, yS/ 2 . C Trochoceras 

 costatum, x]/2- D Phragmoceras parvuni, xJ/2. E Bwmastus 

 (Illaenus) ioxus, x^. F. Homalonotus delphinocephalus, yJ/z. 

 G Calymene niagarensis, xl. H Dalmanites limulurus, x^. / 

 Arctinurus {Lichas) boltoni, x l / 2 . J Ewypterus remipes, x%. 

 K Leperditia scalaris, x2. 



