360 Dr. W. T. Caiman — The Appendages of Trilobites. 



Fig. 1. — Neolenus serratus (Kominger). 



Eestoration of the ventral aspect with appendages. Burgess Shale (Middle 



Cambrian), British Columbia. (From Walcott.) hy. hypostome ; a.antennules; 



an. anus ; c.r. caudal rami ; ep. epipodite ; ex. exopodite ; pr. gnathobasic 



process of protopodite ; v.i. ventral integument. 



