EASTMAN: CATALOG OF FOSSIL FISHES IN CARNEGIE MUSEUM. 375 



comparatively slender pedicle; its depth little, if at all, exceeding one-third the 

 maximum depth of the abdominal region. Teeth large, with very slender apex, and 

 about forty in total number in the dentary; depth of operculum somewhat ex- 

 ceeding its maximum breadth; branchiostegal rays about twenty-four. Dorsal 

 fin with about twenty rays, deeper than long, its depth equalling about one-half 

 that of the trunk at its origin; this fin arising in advance of the middle of the back, 

 the distance from the occiput to its origin being about equal to that from its hinder 

 border to the base of the caudal fin. Pelvic fins arising opposite the front half of 

 the dorsal fin; anal fin smaller than the dorsal, with from twelve to fourteen rays. 

 Scales smooth, or in part marked with a few feeble, short, transverse striae." (A. 

 S. Woodward, I. c, Pt. Ill, p. 333). 



The specimens listed below agree with those from Cerin, which are assigned 

 to this species by Thiolliere, but the identity of which with the type-species is 

 regarded by Dr. A. S. Woodward as somewhat uncertain: Nos. 4062, 4064, 4074, 

 4074a, 4097, 4300, 4301, 4302, 5108. 



17. Catunis driani Thiolliere. 



18. Caturus velifer Thiolliere. 



The two foregoing are large species, occurring in the lithographic stone of 

 Cerin, France, known only by a few examples, and not represented in the collection 

 of the Carnegie Museum, except by one or two obscure fragments (Cat. No. 4089). 

 It may be remarked here that the genus Callopterus, two species of which have been 

 described from the Lower Kimmeridgian of Ain, France, is very closely related to 

 Caturus, differing only in the more remote position of the dorsal fin, which is almost 

 completely opposed to the anal. No examples of Callopterus are preserved in either 

 the British or the Carnegie Museums. 



Suborder ^THEOSPONDYLI. 

 " Notochord varying in persistence, but pleurocentra and hypocentra usually 

 fused, never forming alternating discs or rings; tail abbreviate-heterocercal or 

 homocercal. Mandible complex, with well-developed splenial rising into a coronoid 

 process, which is completed by a distinct coronoid bone. Infra-clavicular plates 

 wanting in the pectoral arch; pectoral fin with more than five basals. Scales 

 ganoid." (A. S. Woodward, I. c, Pt. Ill, p. 415). 



Family ASPIDORHYNCHID^. 

 " Head and trunk much elongated, the snout produced, and the abdominal 

 much longer than the caudal region; tail homocercal. Cranial and facial bones 



