BUTFALO SOCIETY OE NATURAL SCIENCES 101 



E 2024 Antero-ventrolateral lacking the lateral spine, shown in 

 inner view (PI. 30, fig. 2), 



Genundewa limestone (Genesee) ; Eighteen Mile Creek, 

 North Evans, near Buffalo, N. Y. Collected by W. L. 

 Bryant. 



Fig. 36. Acanthaspis sp. Distal Half of a Spine, X 2 

 A, side view; B, cross-section at about middle of spine. E 2029. 



E 2029 Distal half of a small spine (fig. 36), apparently a lateral 

 appendage of Acanthaspis, on a piece of shale. The 

 ornamentation consists of tubercles, some of them elon- 

 gated or tear-shaped and pointing downward. Length 

 as far as preserved, 32 mm.; greatest width, 6; width 

 near apex, 3. 



Rhinestreet shale (Portage) ; Shore of Lake Erie, near 

 Sturgeon Point. Collected by Dr. H. U. Williams. 



INCERT^ SEDIS 



The genera and species following are known only by isolated armor 

 plates whose relationships are at present unknown. Some of them — 

 for instance, Holonema — seem to be Arthrodira, but concerning the 

 others no positive statement can at present be made. 



Eczematolepis fragilis (Newberry)^* 



(PL 29, fig. 2; PL 30, fig. i) 



This species has already been recorded from the Onondaga of 

 western New York.^^ It is interesting to note that it, or a very closely 



■5' However undesirous we may be of using a name like Eczematolepis, the rule of priority leaves us 

 no choice in the matter, since the earlier and more euphonious name, Acantholepis, is clearly pre- 

 occupied. See O. P. Hay: Bibl. and Catal. of the Fos. Vert. N. Amer., p. 332. Bull. 179, U. 5. 

 Geol. Survey, igos. 



*' Eastman, C. R.: Devonic fishes of the N. Y. formations, p. 79. IV. Y. Slate Mus., Mem. 10, 1907 . 



