4l8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



DESCRIPTION OF PLATE 42 



PAGE 



Callavia caUavci Lapworth 282 



Fig. I. The right hand side of this figure is a photograph of a speci- 

 men natural size. The left side is a photograph of the same 

 specimen reversed and joined to the other with great care 

 from measurements of the glabella. The central part of the 

 cheek was broken out and has been recemented, as also the 

 posterior of the two cracks across the margin. The cheek is 

 slightly bent downwards along a line running about midway 

 between the glabella and lateral margin; when this is allowed 

 for, the head is 3 to 4 mm. wider. The very oblique lighting 

 gives a false impression of strength to the 3d and 4th glabellar 

 furrows. 



Original in the collection of the University Museum, Birm- 

 ingham, England. Cast in the U. S. National Museum, Cata- 

 logue No. 56796(7, to which it was presented by Mr. Frank 

 Raw. 



This specimen was collected in Comley quarry, on Little 

 Caradoc, near Church Stretton, Central Shropshire, England. 

 2. Side view of cephalon represented in fig. i showing the con- 

 vexity, form of the glabella, cheek, border, and intergenal 

 spine. Natural size. 



Callavia carllandi Raw ( MS. ) 282 



Fig. 3. The type specimen 



4. Side view of the specimen represented by fig. 3. Natural size. 

 The specimen represented by figs. 3 and 4 was collected at 

 tlie same locality as the specimen oi Callavia caUavci repre- 

 sented in figs. I and 2. Original in the collection of the Uni- 

 versity Museum, Birmingham, England. Cast in the U. S. 

 National Museum, Catalogue No. 56797a, to which it was pre- 

 sented bv Mr. Frank Raw. 



