i.i.i 



TUl oi.ii K> 7"'.t 



001 ITYfllnni.r. Angelin. ls:,|. 



I'M' llnl'V.h I I.KICIII. H. gp. 



This species is represented in the material liefore me by seven more or less com- 

 plete pygidia: one small and entire. _'! mm. in length and :::. mm. in greatest width; 

 another, a part of a very large one. fully 1-Jii iitm. in \\idthacrossthetop. The general 

 form of the tir-t i- -emi-oval except alxnit the margins which are broadly concave. 



Kitf. \-'. An nitir.- i.yjfi.lluin ,,f Ptyehnpyge ulrichi, Cannon Falls. 



The location is clearly defined, tin- axis Keing relatively narrow, slightly more than 



one-fifth the entire length of the -liield, and extending for somewhat more than 



'liinls the length of the pygidium, ending in a blunt, not elevated extremity. 



i j - 



11 Fragment of a laiv pyiliuni of 



ulrichi. wit! ,n ..f <.ut;.ii<-. ( .1 



It I >ears eight or nine annulations, only the first three or four being well defined. 

 The pleura* are convex and rather short on account of the broad, concave margin. 

 Besides the articulating segment there are five rids, \\-ith a trace of a sixth; and on 

 the internal cast seven or eight ribs may l>e discerned. Of these the fir*t is the 



