Mr. A. S. Woodward—Paleichthyological Notes. 287 
The genus as thus defined is evidently to be placed in the 
group of Paleoniscidee comprising Acrolepis, Hlonichthys, 
Gyrolepis, and their allies *. 
Ganolepis gracilis, sp.n. (Pl. X. figs. 7-9.) 
The type and only known species, of diminutive size, 
apparently not exceeding 0°05 metre in length. Length of 
head with opercular apparatus about equal to the maximum 
depth of the trunk and one fourth of the total length of the 
fish; external ornament very conspicuous. Dorsal fin arising 
slightly in advance of the middle point of the back and much 
larger than the anal fin. Scales marked by fine parallel 
horizontal or oblique ridges, terminating in serrations at the 
hinder border and often flexed upwards in front parallel to 
‘ the anterior border. 
The least fragmentary and distorted specimen of this species 
is shown of the natural size in fig. 7. It exhibits apparently 
the original form of the trunk, the attenuated upper caudal 
lobe, the thick squamation, the prominent lateral line, and 
parts of the median fins. The form, proportions, and orna- 
ment of the maxilla are well seen ina detached specimen, 
enlarged twice, in fig 8, and the characters of the scale- 
ornament are indicated in fig. 9. 
EXPLANATION OF PLATE X. 
Fig. 1. Ceratodus levissimus, Miall; left upper tooth, oral aspect. Lower 
Keuper, Coten End, Warwick. Collection of Rev. P. B. 
Brodie, M.A., F.G.S8., Rowington. 
Fig. 1a. Ditto; outer aspect of a “ horn ” or denticle. 
Figs. 2-4. Phabodus Brodie, sp. n.; teeth in series from the anterior 
aspect, twice nat. size (2), one imperfect tooth viewed from 
above, twice nat. size (3), and restored tooth from the anterior 
aspect, thrice nat. size (4). Upper Keuper, Shrewley, Warwick- 
shire. Coll. of Rev. P. B. Brodie. 
Fig. 5. Wybodont fin-spine (“ Hybodus keuperinus, Murch. and Strickl.”), 
lateral aspect. bid. Coll. of Rey. P. B. Brodie. 
Fig. 5a, Ditto; posterior view of extremity of spine. 
Figs. 5b, ec. Ditto; transverse sections of spine. 
Fig. 6. Nemacanthus monilifer, Ag.; dorsal fin-spine, lateral aspect. 
Rhetic, Aust Clitf, British Museum, No. P. 2854. 
Figs. 7-9. Ganolepis gracilis, gen. et sp. n.; lateral view of fish (7), right 
maxilla, twice nat. size (8), and scale of flank, thrice nat. size (9). 
Permian (?), Medwiesko, near Atjinsk, Government of Jenissei, 
Siberia. Royal State Museum, Stockholm, 
Figs. 10-12. Gyrolepis dubius, sp. n.; internal impression of squamation 
of flank (10), an imperfect scale (11), and portion of dorsal tin- 
rays (12). Rhvetic, Scania. Museum of Swedish Geological 
Survey, Sweden. 
[ Unless otherwise stated, all the figures are of the natural size. | 
* Cat. Foss. Fishes Brit. Mus. pt. ii. (1891) p. 429. 
rp 
