[MATTHEW] STUDIES ON CAMBRIAN FAUNAS 95 



composed of four segments ; the lateral lobes are marked by four moder- 

 ately well defined ribs." 



Closely allied to E. breviceps is Carausia Menevensis of Hicks. Accord- 

 ing to Dr. Hicks this species may be distinguished from Salter's species 

 above named by "its shorter glabella, smaller number of body segments 

 and shorter spines in the hindermost pleursB." He found 15 body seg- 

 ments and thinks this nearly the full number. The only specimen he 

 found, and which is figured, is about half of the length of a full sized 

 Erinnys. 



