2-t WEALDEN AND PURBECK FOSSIL FISHES. 



known from the Jurassic of Talbragar, New South Wales (Cocrolejn.s anstraJis, 

 A. S. Woodward, Meui. Geol. Surv. New South Wales, Palteont. no. 9, 1895, p. 5, 

 pi. i ; pi. ii, fig. 4; pi. v, fig. 1). 



1. Coccolepis andrewsi, A. S. Woodward. Plate IV, figs. 2, 8. 



1890. Coccolejns amlrrwai. Woodward aud Slierboni {ex Traquair, MS.), Cat. Brit. Foss. Vertebrata, 

 p. 37 (name only). 



1891. Coccohpis andreiriti, A. S. Woodward, Catal. Foss. Fishes, B. M.. pt. ii, p. 524. 

 1895. Coccolepis andrewsi, A. S. Woodward, G-eol. Mag. [4], vol. ii, p. 145, pi. vii, fig. 1. 



Tijpe. — Fish, wanting pectoral fins; Museum of Practical Geology, London. 



SjJcciJic Characters. — A small species attaining a length of about 6 cm. : maxi- 

 mum depth of trunk contained about six times in the total length ; upper caudal 

 lobe excessively elongated and slender. Fin-rays smooth, with distant articulations. 

 Dorsal fin arising somewhat in advance of the middle point of the back, partly 

 opposed to the hinder portion of the pelvic fins, at least as deep as long, and its 

 maximum depth nearly equalling that of the trunk at its point of origin ; anal fin 

 scarcely deeper than long, about two-thirds as extended as the dorsal, arising com- 

 pletely behind the latter and situated close to the caudal fin. Scales very coarsely 

 granulated ; fulcra of upper caudal lobe slender, much elongated, and very 

 numerous. 



Descrij)Hon of Specimens.- — This species is known only by two specimens dis- 

 covered by the Rev. W. R. Andrews, F.G.S., the one nearly complete (PL IV, 

 fig. 2), the other showing the posterior abdominal and caudal regions (PI. IV, 

 figs. 3, 3 a). 



The head of the type specimen appears to be typically PaljBoniscid, l)ut it is too 

 imperfect for description. The only noteworthy features are a few slender conical 

 teeth in the mandible, and traces of delicate broad branchiostegal rays below. 

 Tlie axial skeleton of the trunk is well exhibited through the thin squamation in 

 both specimens, and is also typically Palseoniscid. Tiie neural and haemal arches, 

 which bound the vacant space for the persistent notochord throughout the length 

 of the fish, are only sfli)erficially ossified, appearing hollow in the fossilised state 

 when broken. Their total number to the base of the caudal fin is ahout forty, atid 

 of these fifteen or sixteen may l)e reckoned as caudal. The neural spines in the 

 abdominal region are stout and relatively large, not fused with their supporting 

 arches; but both these and the hsemal spines are firmly fixed to their arches in 

 the tail. There are no ribs, the hgenuxl arches in the abdominal region being merely 

 a series of diminutive cartilages, best seen in the counterpart of the type specimen. 

 At the beginning of the caudal region the hgemal arches suddenly become elongated, 

 and five are distinct in advance of the anal fin in l)oth specimens. Behind these 



