102 
ICHTHYODORULITES. 
Ctenacanthus (?) Isevis, Davis. 
1883. Ctenacanthus Icevis, J. W. Davis, Trans. Roy. Dublin Soc. [2] 
Yol. i. p. 341, pi. xlv. fig'. 1. 
Type. Bpsfol Museum. 
This species may pertain to Acondylacanthus. 
Form. <Sf Log. Lower Carboniferous Limestone : Armagh. 
P. 2531. Type specimen. Ennislcillen Coll. 
P. 2532-3, P. 2873. Three imperfect spines. Ennislcillen Coll. 
39186. Much crushed imperfect spine. Boiverbank Coll. 
Ctenacanthus (?) pustulatus, Davis. 
1883. Ctenacanthus pustulatus , J. W. Davis, Trans. Roy. Dublin Soc. 
[2] vol. i. p. 344, pi. xlv. fig. 2. 
Type. British Museum. 
This species may pertain to Asteroptychius. 
Form. <Sf Log. Lower Carboniferous Limestone: Armagh. 
P. 2529. Type specimen. Emnislcillen Coll. 
The following species have also been described, but there are no 
examples in the Collection:— 
Ctenacanthus anyulatus, Newberry & Worthen, Pal. Illinois, 
vol. ii. (1866), p. 118, pi. xii. fig. 4.—Chester Limestone ; 
Illinois. 
Ctenacanthus anyustus , J. S. Newberry, Paheoz. Pishes N. America 
(Mon. U.S. Geol. Surv. no. xvi. 1889), p. 181.-—Berea Grit 
(Lower Carboniferous); Berea, Ohio. fV.f-f.j 
Ctenacanthus burlinytonensis , St. John & Worthen, Pal. Illinois, 
vol. vi. (1875), p. 426, pi. xv. figs. 6, 7.—Upper Burlington 
Limestone ; Illinois and Iowa. [? Acondylacantlius .] 
Ctenacanthus buttersi , St. John & Worthen, op. cit. vol. vii. (18$3), 
p. 240, pi. xxii. fig. 2.—Lower Coal-Measures ; Illinois. 
Ctenacanthus cannaliratus, St. John & Worthen, op. cit. vol. vii. 
p. 239, pi. xxi. fig. 3.—Chester Limestone ; Illinois. 
Ctenacanthus darki, J. S. Newberry, Palseoz. Pishes N. America 
(Mon. U.S. Geol. Surv. no. xvi. 1889), p. 168, pi. xxvi. 
figs. 2, 3.—Cleveland Shale (Lower Carboniferous; ; Berea, 
Ohio. [Columbia College, New York.] 
