NO. 3 CAMBRIAN TRILOBITES 255 



PAGE 



Karlia minor Walcott 224 



Fig. 7. (X4.) Group of specimens on a fragment of shale, and 

 showing characteristics of the species. U. S. National 

 Museum, Catalogue No. 2670^. 

 ja. (X 10.) A young individual with two segments. U. S. 



National Museum, Catalogue No. 26702. 

 yb. (X6.) Dorsal shield with three segments. U. S. National 



Museum, Catalogue No. 61730. 

 yc. (X6.) Hypostoma. A smaller hypostoma is shown on fig. 7. 

 U. S. National Museum, Catalogue No. 26703. 

 The specimens represented by figs. 7, ya-c are from locality i, 

 Middle Cambrian : Manuels River, above Conception Bay, near 

 Topsail Head, Newfoundland. 



Karlia stephenensis Walcott 224 



Fig, 8. (X2.) Nearly entire dorsal shield with the free cheeks 

 restored from other specimens. U. S. National Museum, 

 Catalogue No. 61731. 

 From locality 14s, Middle Cambrian : Stephen formation ; 

 Mount Stephen, British Columbia, Canada. 



Tsinania cleora Walcott 227 



Figs. 9, 9'. (X3-) Top and side view of cranidium. U. S. National 

 Museum, Catalogue No. 6iy2,2. 



ga. (X2.) Associated free cheek. U. S. National Museum, 



Catalogue No. 61733. 



gb. (X2.) Associated thoracic segment. U. S. National Museum, 



Catalogue No. 61734. 

 9c, 9c'. (X2.) Top and side view of an associated pygidium. 



U. S. National Museum, Catalogue No. 61735. 

 The specimens represented by figs. 9, ga-c are from locality sow, 

 Upper Cambrian : Notch Peak limestone ; House Range, Utah. 



Tsinania elongata Walcott 228 



Figs. 10, 100. (X4-) Top and side view of a cranidium. U. S. 

 National Museum, Catalogue No. 61736. 

 The specimen represented by figs. 10 and loa is from locality 

 3466, Upper Cambrian : 2 miles west of Donald Station, on the 

 Canadian Pacific Railway, British Columbia, Canada. 



