154 CRETACEOUS PALEONTOLOGY. 



Anchura pennata. 

 Pyrifusus mullicaensis. 

 Pyropsis trochiformis. 

 Callianassa mortoni. 



Among the conspicuous members of the Tinton fauna are the 

 crustacean claws belonging to the genus Callianassa. Examples 

 of these claws can usually be found at exposures of the formation, 

 even though the outcrop is highly weathered. In the Mount 

 Laurel-Navesink faunas the same form of claws are usually 

 present in the more southwestern localities, although they have 

 not been commonly observed in Monmouth County. 



Only a small proportion of the members of the Tinton fauna 

 are restricted to the formation, 21 per cent, in all, but among 

 these species is Sphenodiscus lobatus, an ammonite distinctly 

 different from any which have been present in preceding faunas, 

 but which is so widely distributed in the Tinton beds that it may 

 be taken as one of the most characteristic members of the fauna. 



