PROC. ACAD NAT. SCI. PHILA. 190S 



TuLGUR PERVERSA 



Sycotypus canaliculatus 



5and Beach Rocks 



Watefi 4in.Deej= 

 Oysters 



5and 

 Water 3 ft. Deep 



COLTON HOW FULGUR AND SYCOTYPUS EAT OYSTERS, ETC 



