242 
SIKEXOHmi. 
1. %yrf, A XV 
'6jO S 3 1 , p. V- '[•? - 
The following species have also been founded upon det ached :e ;*tl 
of which the majority may belong to this genus. They ajo not 
represented in the Collection. 
Dipterus {Ctenodus) flabelliformis, J, S. Newberry, Pabeoz, Tishes 
IT. America (Mon. II. S. Geol. Surv. no. xvi, 1889), ]>. 90, 
pl. xxvii. fig. 21.—Chemung Group; Warren, Pennsylvania. 
[Columbia College, New York,] 
Dipterus glaber , C. H. Pander, Ctenodipt. devon. Syst. (1 858' 
p. 29, pl. vii. fig. 10 (named Dip ter us ( Cheirodus ?) . laber 
on plate).—Devonian; Ssjass, Govt, of St. Petersburg. 
[School of Mines, St. Petersburg.] 
—Dipterus ( Ctenodus ) lev is, J. S. Newberry, op.cit I p. 90, pl. xxvii. 
figs. 22, 23.—Chemung Group; Warren, Pa. [Columbia 
College, New York.] 
Dipterus ( Ctenodus ) minutus , J. S. Newberry, ibid ; p. 91, pl. xxvii. 
fig. 26.—Chemung Conglomerate ; Warren, Pa. 
Dipterus murchisoni , C. E. Pander, op. cit. p. 23, pl. vii. figs. 2-4.. 
—Devonian; Eussia, [School of Mines, St. Petersburg.] 
Dipterus ( Ctenodus) nelsoni , J. S. Newberry, op. cit . p. 89, 
pl. xxvii. figs. 19, 20.—Chemung Group; Warren, Pa. 
[Columbia College, New York.] Jp ; ffT f W I 
Dipterus parvulus , L. Agassiz, Poiss. Foss. v. G. ft. (1845), p. 12 x, 
pl. xxfiii. a. fig. 23 ( Ctenodus); E. von Eichwald, Let’- 
Eossica, vol. i. (1860), p. 1537 : Dipterus tuberodatus, 
C. H. Pander, op. cit. p. 22, pl. v. figs. 20-22.—Devonian ; 
Eussia. 
w--r._._£ 5 uS - Dipterus ( Ctenodus) vadiatus , J. 8. Newberry («<m Eichw ald & 
Pander), op. ciL p. 119, pl. xxvii. fig. 33.—Gatskill 
Group ; Tioga Co., Pa, 
Dipterus sherwoocli , J. 8. Newberry, Eep. Geol. Surv. Ohio, vol. ii. 
pt. ii. (1875), p. 61, pl. lviii. fig. 17, and op. cit. < 1889), 
p. 118, pl. xxvii. fig. 3.—Catskili Group j Tioga Co., Pa. 
[Columbia College, New York,] 
Dipterus verneuiUi , C. H. Pander, op. cit. p. 21, pl. v. figs. 1-9 ; 
E. vbn Eichwald, Leth. Eossica, vol. i. (1860), p. 1538.— 
Devonian ; Eussia. [School of Mines, St. Petersburg.] 
Indeterminable scales from the Devonian of the neighbourhood oi 
St. Petersburg have also been named Dipterus arenaceus, E. von 
Eichwald, Bull. Soc. Imp. Nat. Moseou, vol. xvii. (1844), p. 831, 
and ibid. vol. xix. (1846), p. 308, pl. x. figs. 31, 32, and Leth. 
Eossica, vol. i. (i860), p. 1540, pl. lvii. fig. 17. 
An undetermined and imperfectly• described iaw, from the Lower 
Jb 1*3 ” 
jA |ofs^ X’e.c -* ! 
vA-f, Dh. 
v* ‘ 
", Y&C tit 
Qici 
