16 
ACTIN0PTERYS1I. 
P. 5681. Type specimen, described and figured from the superior 
aspect, he. tit. 1894, pi. xliii. fig. 2, and right mandibular 
ramus figured ibid. fig. 2 a ; Lower Chalk, Burham, Kent- 
Harford CoU. 
P. 1854. lmperlect head and abdominal region, much fractured, 
labelled Aulolepis ti/jpus by Agassiz, and probably utili®® 
by him in his description of that species; Burham. 
right frontal bone is figured he. cit. 1894, pi. xliii. fig- 
and the right maxilla with supramaxillaries ibid, fig- d 11 ' 
Egerton CoU- 
49903. Hoad and opercular apparatus, with remains of pectoral fin 
and squamation, the former figured loc. tit. 1894, pi. *li«- 
fig. 5 ; Lower Chalk, Lewes. Capron CoU- 
Osmeroides gracilis, Davis. 
[Plate II. figs. 1, 2.] 
1887. Osmeroides gracilis, J. \Y. Davis, Trans. Roy. Dublin Soc. [ 2 ' 
vol. iii. p. 559, pi. xxxi. tigs. 2, 3. . j 
1887. Osmeroides lotus , J. W. Davis, ibid. p. 561, pi. xxxi. fig- 1 
[Imperfect distorted fish ; Edinburgh Museum.] . i 
( ? ) 1887 • Osmeroides brevis. J. VV. Davis, ibid. p. 560, pi. xxxii. fig- 
[Ditto.] 
(?) 1887. Osmeroides dubius, J. W. Davis, ibid. p. 565, pi. xxxi. fig- 4 ' 
[Ditto.] 1 
Type. Imperfect fish ; Edinburgh Museum of Science and Art. 
Length of head with opercular apparatus nearly equalling h 
that of the trunk from the pectoral arch to the base of the caudal 
fin. Cranial roof, opercular bones, and upper branchiostegal ra - vS 
smooth and unornamented : a few minute tritoral teeth within the 
mouth. About 40 abdominal and 20 caudal vertebra:. Dorsal h“ 
comprising 20 rays, the distance between its origin and the occip’ 1 
somewhat less than that between its termination and the base of the 
caudal iin ; pelvic fins opposite the hinder half of the dorsal; an » 
fin small, with not more than 8 or 10 rays, arising nearer to t 
caudal than to the pelvic pair. Radiating grooves in overlapl ,e 
portion ot scales especially conspicuous. 
The type specimen of this species is evidently lengthened by 
crushing, and the rotund form of the fish causes the mode 0 
distortion of the different specimens to be very varied. It 1® ^' lU 
difficult to determine the original proportions of the species. 
Form. Loc. Upper Cretaceous: Sahel Alma, Mount Lebanon. 
