300 
ACTIXOPTERYGII. 
P. 3594. Type specimen, wanting the head and dorsal margin, and 
not exhibiting the “lateral line ” so conspicuously as 
indicated in the drawing published by Agassiz; Barrow- 
on-Soar. Enniskillen Coll. 
P. 887 a. Another less imperfect specimen, shown of the natural 
size in PI. VII. fig. 1 ; locality unknown, but probably 
from Barrow-on-Soar. The definition of the species given 
above is based upon this specimen. The teeth are very 
imperfectly displayed. Impressions of the neural arches 
above the notochord are distinct, and there are also traces 
of ribs besides the robust haemal arches at the base of the 
caudal fin. Eger ton Coll. 
P. 888. Another larger specimen about 0*1 in length ; Barrow-on- 
Soar. The opercular and branchiostegal apparatus is 
especially well shown, and all the fins are preserved. 
Egerton Coll. 
P. 6096. Remains of head, opercular apparatus, and pectoral arch, 
probably of this species; Lower Lias, Wilmcote, near 
Stratford-on- Avon. 
Presented by the Eev. H. E. Lowe , 1889. 
Eugnathus microlepidotus^ Agassiz. 
1833. TJrceus microlepidotus , L. Agassiz, Poiss. Foss. vol. ii. pt. i. p. 12. 
1839. Eugnathus microlepidotus , L. Agassiz, Neues Jahrb. p. 118. 
1844. Eugnathus microlepidotus , L. Agassiz, Poiss. Foss. vol. ii. pt. ii. 
p. 104. 
1863. Eugnathus microlepidotus , A. Wagner, Sitzungsb. k. bay. Akad. 
Wiss., math.-phys. Cl. vol. ix. p. 673. 
Type. Imperfect fish ; Palaeontological Museum, Munich. 
A species of moderate size, attaining a length of about 0’4. 
Length of head with opercular apparatus much exceeding the 
maximum depth of the trunk, and contained about four times in 
the total length of the fish. Head elongated and the external bones 
conspicuously ornamented with tubercles and delicate rugae; teeth 
on the dentary bone large and very robust. Fins apparently as in 
the type species. Principal scales completely covered on their 
exposed face with a delicate striate ornament. 
A fish from the Lithographic Stone of Cirin, Ain, France, not 
readily distinguished from this species, is named Eugnathus prce- 
longus by V. Thiolliere, Ann. Sci. Phys. & Hat. Lyon, [2] vol. iii. 
