1900.] HAY—VERTEBRATES OF CARBONIFEROUS AGE. 103 
occupied by patch of some size in which the meshwork of the canals 
is very irregular. In Newberry and Worthen’s figure a large 
portion of the scale is occupied by such an irregular meshwork. 
This may have been due to imperfections of the scale or to errors 
of observation. At least, I cannot doubt that the scale before me 
belongs to the same species as that described by the authors 
named. ‘The figures presented by the same authors in volume iv 
of the Geological Survey of Lliinois, Pl. iv, Fig. 1, show a scale 
differing from the other considerably in form and ornamentation, 
yet doubtless belonging to the same species. Here the centrally 
placed irregular meshwork occupies much less space. ‘The radiat- 
ing canals are shown, but are not conspicuous; and the fine strize 
are not shown at all. In fact, the latter are so fine that they could 
be truly represented only in an enlarged view of the surface. A 
very similar scale (Cope’s F, 99) has been identified by Prof. 
Cope (op. cit., p. 77) as S. occidentalis, as well as others less 
perfectly preserved (Cope’s F, 19, 20; not F, 1, 2). In these the 
nutrient canals are present, but represented by very fine lines and 
thus not conspicuous. ‘The fine striz, when looked for under a 
lens, occupy a large portion of the surface of the scale. 
If I am correct in my identification of the scale spoken of above 
as bearing Daniels’ No. 13, then I must regard as a synonym of 
Sagenodus occidentalis the scale described and figured by Prof. Cope 
under the name Sagenodus brownie, as cited above in the 
synonomy. I find nothing to distinguish it from Daniels’ No. 13, 
except size, and this cannot be considered. The form of the scale 
is very much like the original figure published by Newberry and 
Worthen. Prof. Cope mentions S. occidentalis in connection with 
his S. drownt@, but states that the areolation of the latter is coarser 
than in any other species. Prof. Cope’s figure of S. drownie is 
faulty in that it represents the scale too broad. 
SAGENODUS QUADRATUS (Newb.). 
Rhizodus quadratus, Newberry, J. S., Geolog. Surv. Ohio, i, Pt. 2, 
1S 73,3435 El. xxxix, Fig. 83. Fel. fishes IV. Amer., 1800, 
piaoglbesicve|s Eo, Ler, Hoss. Lenn... \, 1890; Pp. Sos 
Woodward, A. S., Cat. Foss. Fishes, Pt. ii, 1891, p. 262 
(Sagenodus suggested). 
Sagenodus quadratus, Cope, E. D., Proc. AMER. PHILOos. Soc., 
EXXVi, 15Q7..pp-, 76, 7'7- 
Dr. Newberry, as above cited, described very briefly and figured 
