4l6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



DESCRIPTION OF PLATE 41 



PAGE 



Olenellus cf. gilberti (See pi. 36).' 

 Fig. I. A large cephalon showing the cast of the inner surface of the 

 cheek and with the left side restored beyond the broken line. 

 Natural size. Compare with figs. 3 and 16, pi. 36; also with 

 fig. 2, pi. 3g. Cast in U. S. National Museum, Catalogue No. 

 56833a- 



2. A small cephalon. X 2. Cast in U. S. National Museum, Cata- 



logue No. 56833^. 



3. A broken cephalon preserving the left palpebral lobe. Natural 



size. Cast in U. S. National Museum, Catalogue No. 56833c. 



4. A telson referred to this species. X 3- Cast in U. S. National 



Museum, Catalogue No. 56833c?. 



The four specimens represented by figs. 1-4 are from the 

 conglomerate limestone at Bic, and are now in the Museum of 

 the Geological Survey of Canada. 



Olenellus logani, new species 333 



Figs. 5, 5a, and 5&. Top, side, and front views of a small and very per- 

 fect cephalon. Top view X 6, other views X 2.5. Cast in U. 

 S. National Museum, Catalogue No. 568320. 

 6. A cephalon X 2, with right side restored in outline. Cast in 

 U. S. National Museum, Catalogue No. 56832^. 

 (See note under fig. 7.) 



Pcudcuiiiias transitaiis, new genus and new species (See pis. 24, 25, 32, s;^, 



34, and 44) 305 



Fig. 7. Top and side views of a large cephalon. Natural size. Cast in 

 U. S. National Museum, Catalogue No. 56842a. 



The specimens represented by figs. 5, 6, and 7 are from 

 I'Anse au Loup, Labrador, and are now in the Museum of the 

 Geological Survey of Canada (5 = catalogue No. 4^4d; 6 = 

 414^'; and 7 = 416). 



Olenellus frcmonti, new species (See pi. 37) 320 



Fig. 8. Enlargement of the specimen represented by fig. 9, pi. 2)7^ to 

 show surface, glabellar lobes, and union of palpebral ridges 

 with glabella. X 6. U. S. National Museum, Catalogue No. 

 56819?. 



Callavia biccnsis, new species 277 



Figs. 9 and ga. Top and side views (X 1-5) of a cephalon and 5 thoracic 

 segments from locality (2r), 2 miles west of Bic, Quebec, 

 Canada. U. S. National Museum, Catalogue No. 5679417. 



Callaz'ia, sp. undt 279 



Figs, id and loa. Ends of pleurae (X2) associated with the specimen 

 represented by figs. 9 and ga. U. S. National Museum, Cata- 

 logue Nos. 56843a and 56843^7. respectively. 



^ No reference to this form occurs in the te.xt. 



