y/ rytA\J j ^/,/&Z*.- ? -t -0 j 
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LEriDOSIRENIDJE. 
0~r. 
— / «-> 
(1859), p. 305, pi. xiv. figs. 8-12, pi. xvi. fig. 2; L. C. Miall, 
Palaeont. Indica, [4] vol. i. pt. ii. (1878), p. 16, pi. iv. 
fig. 4 : Ceratodus oblongus, T. Oldham, tom. cit. p. 307, 
pi. xy. figs, i , S.—Kota-Maleri Beds ; Maleri, near Nagpur, 
India. [Indian Museum, Calcutta.] 
Fragments of dental plates of Ceratodus , from the Bhaetic Bone- 
bed of Wiirtemberg, are erroneously described by Plieninger (Meyer 
& Plieninger’s Pal. Wurttembergs, p. 117, pi. x. figs. 14-16) under 
the name of Psammodus porosus. 
The so-called Ceratodus heteromorphus , Agassiz (Poiss. Boss, 
vol. iii. 1838, p. 136, pi. xviii. figs. 32-34), is founded upon a 
cephalic spine of a Hybodont Selachian (supra, Part I. p. 306), a 
much abraded Ceratodont dental plate, and a very doubtful tooth 
from the Muschelkalk. This “species” must, therefore, be re¬ 
moved from the list, as remarked by E. Eraas, Wiirtt. Jahresh. 
vol. xlv. (1889), p. 233. 
Two fossils from the Upper Cretaceous Fort Union Beds of Mon¬ 
tana, as yet not satisfactorily determined, are named Ceratodus 
emiciferus and C. hieroglyphic, E. D. Cope, Proc. Acad. Nat. Sci. ^ 
Philad. 1876, pp. 259, 260. 7J~t'/iArC 
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Family position uncertain. ' J<rT 
Genus GOSFORDIA, A. S. Woodward. 
[Foss. Fishes Hawkesbury Series, Gosford (Mem. Geoh Surv. 
N. S. "Wales, Palaeont. no. iv. 1890), p. 4.] 
Head very small; snout pointed ; trunk elongate, though com¬ 
paratively deep, laterally compressed. Median fin continuous; 
pelvic fins acutely lobate, biserially fringed. Scales very small, 
delicate, overlapping, marked by fine striae. 
Gosfordia trim cat a, A. S. "Woodward. 
1890. Gosfordia truncata , A. S. Woodward, op. cit. p. 5, pi. i., pi. ii, 
figs. 1, 2. 
Type. Head and abdominal region ; Geol. Surv. Museum, Sydney. 
The type and only known species, attaining a length of about 0'6. 
Maximum depth of trunk contained somewhat more than three 
times in the total length. 
Form. Loc. Lower Hawkesbury Beds (Upper Triassic) : Gosford, 
New South Wales. 
Not represented in the Collection. 
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