NO. 5 CAMBRIAN TRILOBITES 423 



Dolichometopus suecicus Angelin — Continued. page 



3a. (Natural size.) Dorsal view of a cranidium from which the 

 outer surface has been exfoliated. U. S. National Mu- 

 seum, Catalogue No. 62683. 

 3^- (X3-) Dorsal view of a pygidium associated with the cra- 

 nidium of this species. U. S. National Museum, Catalogue 

 No. 62684. 



The specimens represented by figs. 3, 3', 3a-b', are from locality 

 8w, Middle Cambrian: Limestones of Paradoxidcs forchhammcri 

 zone at Andrarum, Sweden. 



4, 4a. (Natural size.) Reproduction of figures by Matthew, 

 which were drawn from Angelin's type specimen now in 

 the Museum at Stockholm. (Trans. Roy. Soc. Canada. 2d 

 ser.. Vol. 3, 1897, Sec. 4, pi. 3, figs. Ja, yb.) 



