388 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



DESCRIPTION OF PLATE 27 



PAGE 

 Callaz'ia broggeri (Walcott) (See pi. 44) 279 



Fig. I. Restoration of the dorsal shield of this species, based on a 

 large number of partially preserved fragments in the limestone 

 and numerous nearly entire specimens compressed in the shale. 

 The specimens in the limestone show the convexity and those 

 in the shale the general proportion and number of segments. 

 Two-thirds natural size. Locality (41), Conception Bay, New- 

 foundland. U. S. National Museum, Catalogue No. 18331. 



2. Hypostoma in shale attached to the doublure. Natural size. 



Locality (41), Conception Bay, Newfoundland. U. S. National 

 Museum, Catalogue No. 18331a. 



3. Portion of a cheek in limestone with the genal and intergenal 



spines. Natural size. Locahty (42), Conception Bay, New- 

 foundland. U. S. National Museum, Catalogue No. 18331&. 



4. A small, imperfectly preserved convex cephalon in shale. 



Natural size. Same locality as tig. 2. U. S. National Museum, 

 Catalogue No. 18331c 



5. Fragments of the posterior four thoracic segments and py- 



gidium compressed in the shale. Natural size. Same locality 

 as fig. 2. U. S. National Museum, Catalogue No. 18331^. 



6. Falcate extension of the pleural lobe of a thoracic segment. X 2. 



Same locality as fig. 2. U. S. National Museum, Catalogue 

 No. 18331^. 



Figures i to 6 are reproduced from drawings illustrating 

 this species in the Tenth Ann. Report U. S. Geol. Survey. 

 [Walcott, 1891] as follows : fig. i = pi. 91, fig. i ; fig. 2 = pi. 92, 

 fig. le; fig. 3 = pl- 92, fig. ih; fig. 4 = pl- 92, fig. ig; fig. 5 = 

 pi. 92, fig. ic; fig. 6^ pi. 92, fig. id. 



Holinia kjerulfi (Linnarsson) (See pi. 44) 288 



Fig. 7. An entire adult dorsal shield with the glabella cut away so 

 as to show the outline of the hypostoma. X 2. 

 Figure 7 is copied from Holm, 1887, pi. 14, fig. 2. 



