388 CD. Walcott — Position of the Olenellus Fauna. 



Billings, Pleurotomaria {Raphistomd) Attleborensis (n. sp.), 

 HyoMthes quadricostatus (n. sp.), H. communis, var. Emmonsi 

 Ford, H. Americanus Billings, II. princeps Billings, II Bil- 

 lingsi Walcott?, Hyolithellus micans Billings, Salter ella cur- 

 vatus (n. sp.), Paradoxides f Walcoiti, n. sp., Ptychoparia 

 mucronatus (n. sp.), P. Attleborensis (n. sp.). Of these, two 

 genera — Pleurotomaria and Paradoxides — have not before been 

 found in a strongly marked Olenellus zone fauna ; and eight 

 of the species and two varieties were unknown in 1886. 



It is doubtful if the genus Paradoxides occurs in this lower 

 Olenellus zone fauna. P. Walcotti is founded on a small 

 head that appears to be generically identical with similarly 

 sized heads of Olenellus asaphoides that are associated with a 

 similar fauna at Troy, N. Y . 



In Newfoundland I have found 14 genera and 23 species 

 and 5 varieties in the Olenellus zone, as follows : Obolella At- 

 lantica, n. sp., Kutorgino; Labradorica, Hyolithellus micans 

 Billings, II. micans, var. rugosa Walcott, Hyolithellus ?, n. sp., 

 HyolUhes princeps Billings, H. impar Ford, H. quadricostatus 

 S. and F., H, 2 n. sp., Pteropodf, n. gen., n. sp., Scenella reti- 

 culata Billings, Stenotheca rugosa, var. acuta-costa Walcott, 

 Stenotheca rugosa, var. erecta Walcott, Stenotheca rugosa, var. 

 levis Walcott, Stenotheca rugosa, var. paupera Billings, Pla- 

 tyceras primcevum Billings, Microdiscus Helena, u. sp., M. 

 speciosus Ford, Microdiscus sp. ?, Olenellus Broggeri Walcott, 

 Avalonia Manuelensis, n. sp., Ptychoparia Morrisi, n. sp., 

 Agraulos (S.) strenuus Billings, A. (S.) strenuus var. nasutus, 

 n. var., Agraulos n. sp., Solenopleura hombifrons Matthew, 

 Solenopleura, n. sp. Of these, 2 genera, 14 species and 4 varie- 

 ties were not previously known in the fauna. 



A list of all the genera and species now known to me from 

 America, gives a total of 55 genera, 127 species and 9 varieties, 

 as follows : 



Spongice. Crinoidea. 



Leptomitus Zitteli, Walcott. Eocystites '? sp. ? 



Girvanella ? sp. ? Trails, burrows and tracks. 



Protospougia sp ? Planolites incipiens, Billings. 



Eydrozoa sp. ? congregatus, Billings. 



Phyllograptus? simplex, Emmons. annularius, n. sp. 



Climacograptus?? Emmonsi, Walcott. Helminthoidichnites marinus, Em- 



Corals. mons. 



Protopharetra, sp. ? Scolithus linearis, Haldeman. 



Spirocyathus A tlanticus, Billings. Cruziana sp. ? 



Coscinocyathus Billingsi, Walcott. JBrachiopoda. 



Archseocyathus profundus, Billings. Lingulella cselata, Hall (sp.) 



y (A) rarum, Ford. Ella, H. and W. 



■ (A) Bensselaericum, Ford. Granvillensis, Walcott. 



Dwighti, n. sp. Linnarssonia Taconica, Walcott. 



Ethmophyllum Whitneyi, Meek. Kutorgina cingulata, Billings. 



Meeki. n. sp. Labradorica, Billings. 



