﻿LKL'IDOSIRENID.TS. - , -> 



(1859), p. 305, pi. xiv. figs. 8 12, pi. xvi. fig. 2 ; L. C. Miall, 

 Palaeont. Indica, [4 J vol. i. pt. ii. (1878), p. 16, pi. iv. 

 fig. 4 : Ceratodus oblongus, T. Oldham, torn. cit. p. 307, 

 pi. xv. figs. 7, 8. — Kota-Maleri Beds ; Maleri, near Nagpur, 

 India. [Indian Museum, Calcutta.] 



Fragments of dental plates of Ceratodus, from the Rhaetic Bone- 

 bed of Wiirtemberg, are erroneously described by Plieninger (Meyer 

 & Plieninger's Pal. Wiirttembergs, p. 117, pi. x. figs. 14-16) under 

 the name of Psammodus porosus. 



The so-called Ceratodus heteromorphus, Agassiz (Poiss. Foss. 

 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. Fraas, Wiirtfc. 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 

 eruciferm and C. hieroglyphics, E. D. Cope, Proc. Acad. Nat. Sci. 

 Philad. 1876, pp. 259, 260. 



Family position uncertain. 



Genus GOSFORDIA, A. S. Woodward. 



[Foss. Fishes Hawkesbury Series, Gosford (Mem. Geoh Surv. 



N*. S. Wales, Palaaont. 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 truncata, A. S. Woodward. 

 1S90. Gosfordia tritncata, A. S. Woodward, op. cit. p. 5, pi. i., pi, ii. 



figs, i, 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. <Sf Loc. Lower Hawkesbury Beds (Upper Triassic) : Gosford, 

 New South Wales. 



Not represented in the Collection. 



t2 



