[MATTHEW] 



STUDIES ON CAMBRIAN FAUNAS 



191 



mostly by varieties (" v") or by representative, nearly allied species (" r "). 

 The Olenellus Fauna referred to here is the restricted grouping associated 

 with Olenellus Thompsoni. Identical species are indicated by "x." 



PQ 



2<î 





3 cS 





Acrotreta sp 



Aerothele Matthewi, Hartt, mut. multicostata. 



Linnarssonia Belli, Dav. mut. ma^na . . . 



Obolella ? sp 



Protorthis, or Orthis, sp 



Orthotheca, sp 



Hyolithes, sp 



Agnostus Xathorsti, Briig. mut 



A. tissus, Lungr 



A. punctuosus, Ang. var 



A. parvifrons, Linrs 



A. c.f. var. nepos, Brog 



A. umbo, mut 



A. la^vigatus, Dalra. var 



Microdiscus pulchellus, Hartt ? 



Conocoryphe pustulosa, n. sp 



Paradoxides Abenacus, mut 



Agraulos cepticephalus, Barr. var. carinatus. . . 



A. holoceplialus 



A. Roberti, n. sp 



A. (?) nanus, n. sp 



A. (?l pusillus, n. sp 



Liostracus validus, n. sp , 



Ptychoparia limbata, n. sp 



P. Adamsi, Bill, var 



Solenopleura arenosa Bill. var. angilimbata, 



•S. Robbii, mut. parva 



Anomocare magnum, Brcig. (?) var 



Dolichoinetopus Acadicus, n. sp 



Dorypyge Wasatchensis, H. & W. var. Acadicus . 



D. quadriceps, H. & W. var. valida 



D. horrida, n. sp 



Elements Contained in this Sub-fauna. 



One feature apparent at tirst glance in this sub-fauna is the great 

 abundance of trilobites ; other orders and classes seem insigniticant in 



