884 



MEMOIRS OF THE CARNEGIE MUSEUM. 



representatives of this species are contained in the collections of the Carnegie 



Museum, one having a length of 17 cm. and the other of 28 cm. These bear the 



catalog numbers 4303 and 4432 respectively. The former of these displays the 



undigested remains of a small vertebrate, probably a lizard-like reptile, within the 



abdominal cavity. Either the vertebral column of the enclosed prey has been 



flexed upon itself, or there are two small creatures to be seen within the body of the 



fish. 



25. CEonoscopus elongatus Eastman. (Plate LVI, figs. 2 and 3). 



1912. CEonoscopus elongatus C. R. Eastman. 



Ann. Carnegie Mus., Vol. VIII, p. 185, pi. XL 



Type. — Nearly complete fish in counterpart: Carnegie Museum Catalogue 

 No. 4079+4079a. 



A small-sized species, attaining a length of about 20 cm. and distinguished 

 from all others belonging to the same genus by its slender and elongated form of 

 body, and by the more forward position of the dorsal fin, which arises opposite the 

 pelvics, and does not extend back of a point midway between them and the origin 

 of the anal. Length of the head with opercular apparatus exceeding the maximum 

 depth of trunk, and contained about five times in the total length of the fish. 

 Vertebrae about 50 in number, with strong neural and hsemal spines. A single 

 large ridge-scale at the upper and lower borders of the caudal pedicle. Teeth small 

 and conical. All fins relatively small, caudal lobes not much expanded. 



The holotype of this species is a nearly complete fish preserved in counterpart, 

 cataloged as No. 4079-|-4079a. It has a total length of 19 cm., and is interesting 

 for containing apparently a small Rhynchocephalian reptile within the abdominal 

 cavity. Another example, cataloged as No. 4088, is about one-third smaller 

 than the type and is complete except for the anterior margin of the head, which is 

 wanting. Three small specimens of Leptolepis are preserved in the same slab, 

 one either superimposed over the body of the large fish in a longitudinal direction, 

 or contained inside. 



Family LEPTOLEPID^. 



" Trunk elegantly fusiform. Head with delicate membrane-bones, the sub- 

 orbital and circumorbital plates almost or completely covering the cheek, more or less 

 enamelled ; parietal bones meeting in the middle line ; snout not produced ; mandibular 

 suspensorium nearly vertical or inclined forwards, but gape of mouth wide; pre- 

 maxilla very small; maxilla large, loosely attached and with two well-developed 

 supramaxillary plates; teeth small and conical. Opercular apparatus complete. 

 Vertebral centra well ossified, but always pierced by the notochord; ribs delicate; 



