PL^TE I. 



rase. 

 Pig. 1. Ol'llILKTA COMPLANATA, lar. NANA 17 



I. All upper view of a Bpecimen, uatural size, as seen lying in tbe matrix. 

 1 a. Tlie same, enlarged. 



1 h. Profile view, enlarged. 



Kig. 2. Raphistoma? hotuliformis 18 



•2. View of upper side, uatural size. 



2 a. Profile view of same. 



2b. Under side of same, magnified. [In the specimen, tlie umbilicus is tilled with rock, 

 though its subangular margins are exposed.] 



I''ig. 3. Kaphistoma ? TKOCHI.SCUS 19 



;!. Upper side, natural size. 

 :!fl. Profile. 



:i 6. Under side, enlarged. [The unibilicus is filhcl with rock in the specimen, but its 

 margin is clearly seen.] 



Fig. 4. CoxocoiiyPHE Kingii. Upper view, natural size 20 



[The specimen is accidentally compressed so as to spread r.ut the posterior extremities of 

 the cephalic shield more than is natural. Broken edges of the crust are also in 

 the figure wrongly made to look like sninll nodes at the ends of the segments of 

 the mesial lobe.] 



Fig. 5. Paradoxidfs ? Nevadensis. Shows upper sideof a part of thorax and pygidium 23 



Fig. (i. Favositks Cundt. sp.) 27 



Fig. 7. AtRVPA liETICULAIilS 38 



7. Dorsal view. 

 7 a. Side view. 



Fig. H. EUMONDIA ? PiNONENSIS 46 



8. Side view of a large specimen, natural size. 

 8a. Opposite view of a smaller specimen. 



Fig. !). SPIRIFER PiNONENSIS 45 



9. Dorsal view, natural size. 

 9 n. Profile view of same. 



9 b. Ventral view of same. 



Fig. 10. I'ntETl S DKNTICULATf.S 49 



lU. The glabella embedded in the matrix (inlarg.d two diameter.^). 

 10(1. Pygidium, enlarged two diameters. 



10 b. Ouo of the thoracic segments seen in luolile (ciilaiged t wo diaiiieleis). 



Fig. 11. Dalmanites (uiidt. sp.) 48 



II. A mould of the pygidinui. 



11 a. Another speciii'.en of saiiu'. 



