CAMBRIAN FOSSILS FROM PIOCHE MOUNTAINS 3c i 



Fig. 2. — Lingulella ella, H. &. W. 



2. View of a well-preserved specimen; twice natural size. Collection Columbia 

 University Museum, No. 20004. 



2a. Elongate specimen; twice natural size. Collection Columbia University 

 Museum, No. 20005. 

 Fig. 3. — Lingulella genei, n. sp. 



3. View of dorsal valve showing distribution of the concentric lines; seven times 

 natural size. Prototype. Collection Columbia University Museum, No. 20006. 



3a. Ventral valve; seven times natural size. Paratype. Collection Columbia 

 University Museum, No. 20006. 



3&. Internal mold of dorsal valve; seven times natural size. Paratype. Col- 

 lection Columbia University Museum, No. 20002, 



PLATE II 



Fig. I. — Kutorgina pannula, White. 



1. View of a large square-shouldered specimen; twice natural size. Collection 

 Columbia University Museum, No. 20009. 



la. Outline drawing of type specimen as figured in Bulletin No. jo, U. S. Geo- 

 logical Survey. 



lb, ic. Outline drawings of specimens as figured in Bulletin No. JO, U. S. Geo- 

 logical Survey. 

 Fig. 2. — Bathyuriscus howelli. Walcott. 



2. Specimen showing the four pairs of pleural grooves extending nearly to the 



margin; natural size. Collection Columbia University Museum, No. 20011. 

 2(1. Specimen tentatively referred to this species; it shows four pairs of glabellar 

 furrows, also well-developed antero-lateral frontal margin; twice natural size. 

 Collection Columbia University Museum, No. 20012. * 



Fig. 3. — Bathyuriscus productus, H. Si W. 



3. View of well-preserved head, natural size. Collection Columbia University 



Museum, No. 20014. 

 3a. View of pygidium showing well-defined, broad, flattened border; no rings 



on axis; natural size. Collection Columbia University Museum, No. 20015. 

 3&. View of pygidium showing rings on axis; border not so flat as in 3a/ natural 



size. Collection Columbia University Museum, No. 20016. 

 Fig. 4. — Ptychoparia piochensis, Walcott. 



4. View of typical specimen; twice natural size. Collection Columbia University 

 Museum, No. 20018. 



4a. View of typical head showing the elevated frontal rim; twice natural size. 



Collection Columbia University Museum, No. 20019. 

 4&. View of free cheek; natural size. Collection Columbia University Museum, 



No. 20020. 

 4c. View of what appears to be an hypostoma with doublure attached; twice 



natural size. Collection Columbia University Museum, No. 20021. 



PLATE III 

 Fig. I. — Ptychoparia kempi, n. sp. 



I. View of prototype showing character of frontal margin and elevations inside 

 eye-lobe; natural size. Collection Columbia University Museum, No. 20023. 



