ICHTHYOPORTTLITES. 
110 
Acondylacanthus tenuistriatus, St. John & Worthen (non Davis), 
op. cit. vol. vi. p. 433 : Gladodus tenuistriatus , H. Boma- 
nowsky, Bull. Soc. Imp. Hat. Moscou, 1864, pt. ii. p. 167, 
pi. iv. fig. 33.—Carboniferous Limestone : Govt, of Toula. 
Acondylacanthus tuberculatus, J. W . Davis, Trans. Boy. Dublin 
Soc. [2] vol. i. (1883), p. 348, pi. xlvi. fig. 4.—Lower 
Carboniferous Limestone; Armagh. [ Olim Enniskillen 
Collection; see Introduction.] 
Doubtful spines are also named Acondylacanthus ? mudgianus , 
St. John & Worthen (op. cit. vol. vii. p. 244, pi. xxiv. fig. 3), from 
the Upper Coal-Measures of Kansas : A. nuperus, St. John & Worthen 
(op. cit. vol. vii. p. 242, pi. xxvi. fig. 3), from the Upper Coal- 
Measures of Illinois ; and A. ? xiphias , St. John & Worthen (op. cit. 
vol. vii. p. 244, pi. xxvi. fig. 1), from the Keokuk Limestone of 
Iowa. 
Genus ASTEROPTYCHIUS, M‘Coy (ex Agassiz, MS.). 
[Ann. Mag. Hat. Hist. [2] vol. ii. 1848, p. 118.] 
Dorsal fin-spines slender, much laterally compressed, gradually 
tapering distally; sides of exserted portion ornamented with few 
thread-like, longitudinal ridges, with broad striated interspaces, in 
which are scattered smooth tubercles ; posterior face concave, each 
margin having a series of large denticles in part directed upwards c 
Asteroptychius ornatus, M‘Coy (ex Agassiz, MS.). 
1843. Aster op ty chius ornatus , L. Agassiz, Poiss. Foss. vol. iii. p. 176 
(name only). 
(?) 1843. Asteroptychiusportlockii, L. Agassiz, ibid. p. 176 (name only). 
1848. Aster opty chius semiornatus, F. MUoy, Ann. Mag. Hat. Hist, [2] 
vol. ii. p. 118. [Woodwardian Museum, Cambridge.] 
1855. Aster opty chius ornatus, F. M‘Coy, Brit, Pakeoz. Foss. p. 615, 
pi. iii. k. figs. 23, 24. 
1855. Asteroptychius semiornatus . F. M‘Coy, ibid. p. 616, pi. iii. k. fig. 22. 
1883. Asteroptychius ornatus , J. W. Davis, Trans. Boy. Dublin Soc. [2] 
vol. i. p. 353, pi. xlvi. figs. 7-9. 
Type. YVoodwardian Museum, Cambridge. 
The type species. 
Form. Sf Loc. Lower Carboniferous Limestone; Armagh, Ireland . 
a, he. 
P. 2541-2.' Twelve imperfect specimens. 
Fnnishillen Coll. 
