BUFFALO SOCIETY OF NATURAL SCIENCES 29 



New York State Museum referred to above. It shows 

 the ornamental tubercles well. They are pointed, and 

 stellate at their bases; in the center of the plate they are 

 crowded and very small, while near the periphery they 

 are much larger, fewer, and more widely spaced. A 

 lateral line is present on this plate, as in some other 

 examples of this element in various species of Coccosteus. 

 It begins near the inner side at about one-third the 

 length of the element from the front margin, extends 

 inward as a straight shallow groove to about the middle 

 of the plate, then turns upward in a curve; this latter 

 portion being indicated in this specimen only by a 

 double arrangement of the ornamentel tubercles and not 

 by a groove. 



Length, as far as preserved, 75 mm. 



Width, at level of horizontal arm of lateral line, 61. 



Lateral (L). — Only the lower limb of one lateral plate 

 is preserved. It is shown in inner view. 



There are also the extremities of two other plates pre- 

 served, near the edge of the specimen; shown in inner 

 view. 



Upper Devonic; Scaumenac Bay, near village of 

 Migouasha, Quebec, Canada. Collected by W. L. 

 Bryant, August, 1915. 



Coccosteus parvulus, n. sp. 



(PL 4, figs. 1-3. PI. 70, fig. i) 



E 2371 Cotypes. — (i) Impressioa in shale of three cranial plates — a 

 median occipital, shown in inner view, and, on either 

 side of it, a plate shown in outer view (PI. 4, figs, i, 3). 



E 2372 (2) Impression of outer face of a postero-ventromedian 



(PL 4, fig. 2). 



Formation and Locality. — Rhinestreet shale (Portage) ; Lower fork 

 of Eighteen Mile Creek, near Hamburg, Erie County, N. Y. Col- 

 lected by W. L. Bryant. 



