8ILUKIAX SVS'l KM 



157 



Fig. 40. GROUP OF LLASDOVERV FOSSILS. 



. Ati \i>a ln'iiiisplici ic;i. il. Stricklandia lens. 



b. Merist<>l!a angustifrons. e. Pentameru.s oblongus. 



c. Orthis reversa. /. Chiton (iritlitlii. 



g. Cyrtoceras approxtmatuin. 



Fig. 47. SILURIAN OBAPTOLITES. 



a. Monograptus spiralis. 

 6. Rastrites peregrinus. 

 c. Monograptus gregarius. 



</. Monogrmptusexi. 

 r. Monogniptus ttodgwicki. 

 /. HonograptuB priodon. 



