Memoirs Carnegie Museum, Vol. VII. 



Plate XLIV. 



sg..^->«;K^gp»iii^«^^ {i'^.-w 







*_?J^«» "£t» 



r-*."^ 



'/^,« 



Scleronema, Hatcheria, Pygidium, and Pseudostegophilus. 

 (For detailed explanation see opposite page.) 



