414 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



DESCRIPTION OF PLATE 40 



PAGE 



Olenellus gigas Peach 2)-2> 



Fig. I. The type specimen. Natural size. From the northern slope of 

 Meal a' Ghubhais, above Loch Maree, Ross-shire, Scotland. 

 Specimen in Royal Scottish Museum, Edinburgh, Scotland. 

 Cast in U. S. National Museum, Catalogue No. 56824a. 



Figure i is drawn from the specimen represented by Peach, 

 1894, p. 667, fig. I. 



Olenelloides annatits Peach , 347 



Fig. 2. Cephalon 2.5 mm. in length (X6) from the same locality as 

 Olenellus gigas. .r.r = intergenal spines. aa = genal spines. 

 Specimen in the Royal Scottish Museum, Edinburgh, Scotland, 

 Catalogue No. M262i6e. Cast in U. S. National Museum, Cata- 

 logue No. 56839a. 



3. Natural matrix of an entire specimen 5 mm. in length (XS) 

 from the same locality as Olenellus gigas. Specimen in the 

 Royal Scottish Museum, Edinburgh, Scotland, Catalogue No. 

 M420id. Cast in L^. S. National Museum, Catalogue No. 



56839^^- 



A matrix of a small dorsal shield of Olenellus lapivorthi 

 occurs on the same piece of shale and is shown on the left 

 side. 



Holmia lundgreni Moberg 290 



Figs. 4 and 4a. Drawn from a plaster cast of the cephalon represented by 

 Moberg, 1899, pi. 14, figs. 2a-b. Natural size. Original in the 

 collection of the Geologic Institution of the University of 

 Lund, Sweden. Cast in the U. S. National Museum, Cata- 

 logue No. 24630a. 



5. Central portions of a cephalon showing glabella very distinctly. 



Natural size. U. S. National Museum, Catalogue No. 246305. 



6. An hypostoma illustrated from a cast taken in a natural 



mould. Natural size. U. S. National Museum, Catalogue No. 

 2463or. 



7. Pygidium. X 3- The test is exfoliated. U. S. National 



Museum, Catalogue No. 24630^. 



The specimens represented by figs. 4 to 7 are from locality 

 (390^). near Tunbyholm, Sweden. 



Olenellus gilbert i var 33^ 



Fig. 8. Fragment of a cephalon (X4) associated with Olenellus caua- 

 denis and O. gilberti. Locality (35/), Ptarmigan Pass, Alberta. 

 U. S. National Museum, Catalogue No. 56830a. 



