NIAGARA FALLS AND VICINITY IOI 



11 Spirifer radiatus; common but generally crushed ; 



with an extended hinge line and form and proportions 

 similar to the preceding species. The striae are fine and 

 flat on top with very narrow interspaces altogether very 

 similar to those covering the plications of S. nia'garen- 

 s i s . A scarcely defined plication appears on each side 

 of the sinus in some specimens, and in these the sinus is 

 rather sharply defined and angular at the bottom. In others 

 the sinus is shallow rounded and not definitely outlined by 

 incipient plications. In the more elongated specimens the 

 cardinal angle is well defined, but in the shorter specimens 

 it is rounded. 



12 Spirifer crisp us rare 



13 Spirifer sulcatus rare 



14 D a 1 m a n e 1 1 a elegantula; rare and with greater con- 



vexity than that of the specimens in the overlying shale. 



15 Plectambonites transversalis rare 



16 Leptaena rhomboidalis rare 



17 Strop heodonta corrugata rare 



18 Orthothetes subplanus rare 



19 Strop hone 11 a patent a rare 



Gastropoda 



20 Platyostoma niagarensis rare 



Trilobites 



21 Illaenus ioxus; fragments of caudal and cephalic shields 



crowded together into masses sometimes of considerable 

 size. 



22 Calymene blumenbachi rare 



Bryozoa 



23 Lichenalia concentrica; common in very irregular 



and much distorted masses. 



Corals 



24 Enterolasma caliculus common 

 Crinoids 



25 Eucalyptocrinus; fragments of root stem and calyx. 



In the lenses below Lewiston hights the same, species ex- 

 cept nos. 2, 3, 9, 10, 14, 15, 17 to 20 and 25 have been 

 found. Rhynchotreta cuneata a m erica n a has 

 more the features of the same species from the western 

 Niagara than those of the Rochester shale species. 



