NO. 3 CAMBRIAN TRILOBITES 2$! 



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Saratogia wisconsensis (Owen) 198 



Fig. S. (Natural size.) Cranidium with occipital spine broken off. 

 5c. (Natural size.) Side outline of fig. 5. 

 5&. (X 2.) Side view of a small cranidium. 

 5c. (Natural size.) Free cheek. 



The specimens represented by figs. 5, SO'-c, are from locality 1516, 

 Upper Cambrian : Gallatin limestone ; Yellowstone National Park, 

 Wyoming. 



These specimens are associated on a slab of limestone (U. S. 

 National Museum, Catalogue No. 35225) and are the same that 

 are illustrated by woodcut prints on plate 64, figs, i, la, Monogr. 32, 

 U. S. Geol. Survey. By error, in making up that plate, a figure of 

 Saratogia hamulus (Owen), fig. ib, and of the pygidium of Ptycho- 

 paria diadcmata (Hall), fig. ic, was included under this species. 



Saratogia calcifera (Walcott) I97 



Figs. 6, 6a. (Natural size.) Dorsal and side views of an imperfect 

 cranidium. U. S. National Museum, Catalogue No. 58554. 

 6b. (Natural size.) Dorsal view of a cranidium, showing the 

 characters of the glabella. U. S. National Museum, Cata- 

 logue No. 58555. 

 6c. (Natural size.) Free cheek. U. S. National Museum, Cata- 

 logue No. 58556. 

 6d, 6e. (X2.) Dorsal view and side outline of pygidium asso- 

 ciated with this species. U. S. National Museum, Catalogue 

 No. 58557. 

 The specimens represented by figs. 6, 6a-e are from locality 76, 

 Upper Cambrian : Hoyt limestone; Hoyts quarry, 4 miles (6.4 km) 

 west of Saratoga Springs, Saratoga County, New York. 



The above illustrations are taken from Smithsonian Miscellaneous 

 Collections, Vol. 57, I9'[4, pi. 43, figs. 7, 7a-ioa. 



Crepicephalus unsia Walcott 217 



Fig. 7, 7'. (X 2.) Dorsal view and side profile of a cranidium. U. S. 

 National Museum, Catalogue No. 61705. 

 ya- (X3.) A small pygidium with front outline restored. U. S. 

 National Museum, Catalogue No. 61706. 

 The specimens represented by figs. 7 and ya are from locality 

 150b, Upper Cambrian : Gallatin limestone ; head of White Creek, 

 Lewis and Clark National Forest, Montana. 



Loiichocephalus minor (Shumard) 192 



Figs. 8, 8a. (X4-) Dorsal view and side outline of a typical cra- 

 nidium. U. S. National Museum, Catalogue No. 61707. 

 86. (X4-) Pencil drawing of specimen represented by photo- 

 graph in fig. 8. 

 From locality 84, Upper Cambrian : Eau Claire formation ; 

 Dresbach, Minnesota. 



Lonchocephalus bunus Walcott 190 



Figs. 9, 9a. (X 3-) Dorsal and side views of typical cranidium. U. S. 

 National Museum, Catalogue No. 61708. 

 The specimen represented by fig. 9 is from locality 99, Upper 

 Cambrian: Franconia formation ; near Winona, Minnesota. Col- 

 lected by Mr. W. A. Finkelnburg, of Winona. 



