PLATE XL. 



(The cost of this plate has been defrayed by the Carnegie Trust for the Universities 



of Scotland.) 



Fig. 

 1. Canobius macrocephalus, Traquair ; type specimen, natural size. From the Pum- 



pherston Oil-shale, " Curly Seam," worked in the Broxburn District, West Lothian. 



Specimen in the Collection of the Author. 

 '2. Another specimen from the same horizon and locality, natural size. In the Royal 



Scottish Museum, Edinburgh. 



3. Specimen showing well the bands of scales on the body, natural size. From the 



same horizon and locality. In the Royal Scottish Museum. 



4. Young specimen, natural size. Same horizon and locality; also in the Royal 



Scottish Museum. 



5. Canobius crassus, Traquair ; counterpart, or imprint, of unique specimen, natural 



size. From Glencartholm, Eskdale, in the Collection of the Author. 



