PI. II. 



Oxycephalus. 

 Tullbergella. 

 Calamorhynchus . 

 Dorycephalus. 



Oxycephalus Clausi, 0. tuberculatus, 0, pectinatus, 0, ]atirostris, Tullbergella 

 cuspidata, Calamorhynchus pellucidus and Dorycephalus Lindstroemi. 



