478 
ACTIXOPTERYGTT. 
Pholidophorus roemeri, K. Martin, Zeitsehr. deutsch. geol. Ges. 
vol. xxvi. (1874), p. 816, pi. xxix. figs. 1, 2.—Rhaetic; 
Hildesheim, Hanover. 
Pholidophorus taramellii , A. de Zigno, loc. cit. (1891), p. 57, 
pi. ii. figs. 7, 8.—Upper Iveuper; Lumezzane, Lombardy. 
[University Museum, Padua.] 
Fragmentary examples of Pholidophorus have also been recorded 
from the Rhaetic of Scania by B. Lundgren, Minneskr. Kongl. 
Fysiogr. Sallsk. Lund, no. v. (1878), p. 32, pi. ii. figs. 63, 72. 
A generically indeterminable mandibular ramus from the Lower 
Ivimmeridgian of Nusplingen, Wiirtemberg, now in the Tubingen 
University Museum, is named Pholidophorus dentatus by F. A. 
Quenstedt, Der Jura (1858), p. 810, pi. c. fig. 13.' Z7/9&- 
K.ii(p. /SO. 
The specimens described as follows, and illustrated by beautiful 
figures, appear to the present writer to differ from the typical 
Pholidophorus solely in the remote position of the dorsal fin, which 
is situated as in the so-called P. maacki (p. 477). Hone of the fins, 
except the caudal, exhibit more than a few basal fulcra (with the 
possible exception of the anal fin of “ Lepidotus sibiricus ”) ; but in 
most examples even of the typical P. bechei, the minute fringe of 
fulcra is lost. In the diagnosis of the so-called Baleiichthys, Rohon 
does not mention any distinctive generic characters :— 
Lepidotus sibiricus , J. V. Rohon, Mem. Acad. Imp. Sci. St. Peters- 
bourg, [7] vol. xxxviii. no. 1 (1890), p. 9, pi. i. fig. 12, 
pi. ii. figs. 23, 24.—Jurassic ; Ust-Balei, Government of 
Irkutsk, Siberia. [Nearly complete fish; Imperial Academy 
of Sciences, St. Petersburg.] ? / cAAhyo Aen / zv—a Q**? 
Baleiichthys graciosa , J. Y. Rohon, ibid. p. 12, pi. i. fig. 8, pi. ii. 
fig. 15.—Ibid. [Ditto. Type species of Baleiichthys.'] 
Baleiichthys lata , J. Y. Rohon, ibid. p. 13, pi. ii. fig. 14.—Ibid. 
[Ditto.] 
The so-called Pholidophorus stabianus (0. G. Costa, Atti Accad. 
Pontan. vol. v. 1850, p. 309, pi. vii. figs. 3, 4), from the Upper 
Jurassic of Castellamare, near Naples, is probably referable to the 
Leptolepidse. 
Genus THORACOPTERUS, Broun. 
[Heues Jahrb. 1858, p. 21.] 
Head, trunk, and squamation as in Pholidophorus. Pectoral fins 
excessively enlarged ; pelvic fins comparatively small; dorsal fin 
small, opposed to the anal fin; caudal fin deeply forked. 
Ts 7/o-ZvZ /J*.pp 
