124 
TCHTHYODOKULITES. 
(1878), p. 3, pi. i. fig. 19: (?) Ichthyodorulites, F. A. Roemer, 
Palaeontogr. vol. iii. (1852), p. 75, pi. xi. fig. 26.—Lower 
Devonian; Harz Mts. 
Machceracanthus archicici: Machcerius orchiaci , M. Rouault, 
Comptes Rendus, vol. xlvii. (1858), p. 103.—Lower De¬ 
vonian; Brittany. 
Machceracanthus bohemicus, 0. Novak, Sitzungsb. k. bohm. Gesell. 
Wiss. 1886 (1887), p. 663, pi. i. fig. 14: Ctencccanthus 
bohemicus , J. Barrande, Syst. Silur. Boheme, Suppl. to 
vol. i. (1872), p. 641, pis. xxviii., xxx., xxxiv.: Machcera¬ 
canthus , E. Kayser, Neues Jahrb. 1884, vol. ii. p. 82.— 
Lower Devonian; Bohemia. [Royal Bohemian Museum, 
Prague.] 
L £> ev- CX'f'l vt*- . cf. C nfhc* ^ c ^>) 
Machceracanthus Icirteti : Machcerius larteti, M. Rouault, tom. cit. 
(1858), p. 102.—Lower Devonian; Brittany. [Type 
species of Mcichcerius.\ 
Machceracanthus major, J. 8. Newberry, Bull. Nat. Inst. (1857), 
u p* 6, and Rep. Geol. Surv. Ohio, vol. i. pt. ii. (1873), 
304, pl- xxv. fig. 2, and Palaeoz. Fishes N. America 
Jffr. (1889), p. 39, pl. xxix, fig. 4.—Lower Devonian (Corni- 
ferous Limestone) ; Ohio. [Columbia College, New York.] 
hceracanthusperacutus, J. S. Newberry, torn. cit. (1857), p. 6, 
and tom. cit. (1873), pp. 303, 305, pl. xxix. fig. 6, and 
r / tV-' woodc., and tom. cit. (1889), pp. 38, 40, pl. xxix. fig. 6, 
and woodc.—Corniferous Limestone ; Ohio. [The type 
species. Columbia College, New York.] 
c/ u. d3/Vy Cfern . nu. au. v £e. 
U 7 . fit- 7a / 
- its’ ‘tSTf a ^ a ■ats’B 
j/. 
./ 
Genus HAFLACANTHUS, Agassiz. 
[Poiss. Foss. Y. G. R. 1845, p. 114.] <^,^r^>cq2b c . uT. 
- & 
? V-* 
Spines of small size, elongated, tapering, more or less curved and 3 
laterally compressed, apparently without posterior denticles; a deep 
longitudinal groove separating a narrow anterior rim from the rest 
of the spine, which has smooth sides or exhibits faint longitudinal 
striae. 
As remarked by von Eichwald, spines of this form may be com¬ 
pared with those of Cheiracanthus and allied Acanthodian genera. 
Haplacantlms marginally Agassiz. 
1845. Haplacanthus marginalis, L. Agassiz, Poiss. Foss. V. G. R. p. 114, 
pl. xxxiii. figs. 4-6. 
1846. Onchus tenuisulcatus, E. von Eichwald, Bull. Soc. Imp. Nat. 
Moscou, vol. xix. pt. ii. p. 292, pl. x. figs. 6, 7. 
