BUFFALO SOCIETY OF NATURAL SCIENCES 23 



I. Antiarchi 

 Genus Bothriolepis Eichwald 



This is the best known genu's among the Antiarchi, exquisitely pre- 

 served specimens showing the entire creature — with the unarmored 

 part of the body, tail and two dorsal fins — having been found. These 

 specimens come from the fine-grained Upper Devonic sandstone 

 exposed on the north shore of Scaumenac Bay, Quebec, and were dis- 

 covered and first made known by Prof. William Patten.* 



In addition to Bothriolepis canadensis, there are three other species 

 of the genus in North America — B. nitida and B. minor, from the 

 Chemung and CatskiU of New York and Pennsylvania; and B. 

 coloradensis from the Upper Devonic of Colorado. 



In the Buffalo Museimi there are a large number of specimens of 

 Bothriolepis representing two species. 



Bothriolepis canadensis (Whiteaves) 



E 2576 Specimen little crushed but lacking head, showing the 

 greatest depth of the animal to have been about half 

 its greatest width. The trunk of Bothriolepis was, there- 

 fore, deeper than indicated by current restorations. 



Upper Devonic: Scaumenac Bay, Quebec. This and 

 the following specimens collected by W. L. Bryant, 1915. 



E 2352 Complete head and trunk, dorsal view. 



E 2353 Head and trunk of large individual in dorsal view, showing 

 sensory canals and well-preserved lateral appendages. 



E 2354 Head and trunk of very large specimen, in dorsal view. 



E 2355 Head and trunk, in dorsal view. 



E 2356 Very young individual, in counterpart, showing complete 

 head and trimk 1 2 mm. in length. 



E 2357 Impression of visceral surface of anterior half of ventral 

 armor. 



E 2358 Anterior dorsomedian plate, in visceral view, showing 

 median keel. 



8 New facts concerning Bothriolepis. Biol. Bull., vii, iqo4. The evolution of the vertebrates 

 and their kin. Philadelphia, 1912; passim. 



