BUFFALO SOCIETY OF NATURAL SCIENCES 25 



Bothriolepis nitida Leidy 



E 2502 Articular plate of pectoral appendage. On the same piece 

 of rock is a scale of Holoptychius giganteus? Ag. 



Catskill; Seeley Creek, branch of Lambs Creek, Mans- 

 field, Tioga County, Pa. Collected by W. L. Bryant, 



E 2504 Fine impression of ventromedian plate, in external view. 

 Other data same as preceding. 



E 2501 Impression of imperfect right anterior ventrolateral plate. 

 Catskill; Troy, Bradford County, Pa. Carll Coll. 



E 2503 Cast of postero-dorsolateral, showing the sensory canal. 

 Original in Philadelphia Academy of Sciences. Catskill; 

 Bradford County, Pa. Sherwood Coll. 



II. Macropetalichthyida 

 Macropetalichthys rapheidolabis Norwood and Owen 



The genus Macropetalichthys is known only by head shields; and 

 the structure of these is not yet entirely understood. Three species 

 are recognized, two from Europe and one from America. The last, 

 M. rapheidolabis, is the best known one of the three, being represented 

 by more or less well-preserved cranial shields in various collections, 

 the best of them from the Delaware limestone (Onondaga) of Ohio. 

 The crania have not been found associated with other remains in such 

 a way as to make it certain that they belong together; and although 

 a number of new specimens have been obtained in recent years, 

 nothing of importance can be added to what is already known regarding 

 this form. The structure of the head shield was discussed by Eastman 

 in 1897 ;3 and the interesting history of the discovery and study of this 

 genus was given by the same author in 1908." 



In the Buffalo museum there are several specimens, but none of 

 them throws any additional light on the structure of this form. 



E 1865 Fragment of a cranium ornamented with stellate tubercles. 

 Onondaga limestone; Cement Quarry, Buffalo, N. Y. 

 Collected by W. L. Bryant. 



' Eastman, C. R. On the cha.Ta,cteTSoi Macropetalichthys. Am. Naturalist, xsxi, 4gs-4QQ, i&g-j. 

 10 Mem. N. Y. Acad. Sciences, x, lOo, 1908. 



