SIROMATEIDiE. 
421 
Omosoma pulchellum (Davis). 
1887. Microdon (?) pidchellus, J. W. Davis, Trans. Roy. Dublin Soc. 
[2] vol. iii. p. oOl, pi. xxiv. fig. 3. 
Type. Small distorted fish; Edinburgh lluseum of Science and 
Art. 
A deep-bodied species, attaining a length of about 0’07. Maxi¬ 
mum depth of trunk equal to its length from pectoral arch to base 
of caudal fin. Fins as in the type species. 
Form. Log. Epper Cretaceous : Sahel Alma, Mt. Lebanon. 
48115. Fine specimen, originally about 0’065 in length. 
Lewis Coll. 
48119-a, 49575. Three imperfect and distorted specimens. 
Lewis Coll. 
The generic determination of the following species is uncertain:— 
Omosoma rnonasteri^ "W. von der March, Palaeontogr. vol. xxxi. 
(1885), p. 245, pi. xxii. fig. 1.—UjDper Cretaceous; Baum- 
berg, Westphalia. [Imperfectfish ; Academy of Miinster.] 
Genus PLATYCORMUS, W. von der March. ^ ' V 
[Zeitschr. deutsch. geol. Ges. vol. x. 1858, p. 251.] 
Cleft of mouth oblique, and jaws with very minute teeth. Yer- 
tehrae about 14 in the abdominal, 20 in the caudal region. Post¬ 
clavicle much elongated and slender, reaching ventral border; 
pelvic fins with small spine, not directly below but somewhat 
behind the pectoral pair; dorsal and anal fins acuminate in front, 
each with a few very stout anterior spines, gradually lengthening 
and closely pressed together; caudal fin deeply forked. Scales 
ctenoid, of moderate size, more or less ornamented with granula¬ 
tions, and extending over the opercular apparatus, head, and base 
of the median fins; no enlarged or thickened scales even on the 
ventral border of the trunk. 
Platycormus germanus (Agassiz). 
1837-39. Beryx germanus, L. Agassiz, Poiss. Foss. vol. iv. p. 121, 
pi. xiv e. 
1858. Platycormus germanus, W. von der Marck, Zeitschr. deutsch. 
geol. Ges. vol. x. p. 251. 
1863. Platycormus germanus, W^. von der Marck, Palaeontogr. vol. xi. 
p. 20, pi. i. figs. 1-3. 
