Homalonotus (Schizopyge) parana Clarke 



Fig. I Pygidium and a fcAv thoracic segments 



- -^ pygidium apparently lacking one segment 

 Locality: Tybagy, Sao Paulo, Brazil 



Homalonotus herscheli Murchi 



IS on 



Fig. 3 A small head with apiculus and scattered tubercles 



4 A series of strongly pustulose thoracic segments 



5 -^ pygidium with a few tubercles 



6 A large cephalon, nearly entire, of characteristic form, 



w^th spinous tubercles at the genal angles and traces of 

 others on the glabella 

 LocaUty: the calc-nodules of Pebble island, West Falkland 



146 



