378 MEMOIRS OF THE CARNEGIE MUSEUM. 



1837. Belonostomus tenuirostris L. Agassiz. 



Bericht Versamml. deutsch. Naturf., Jena, 1836, p. 127. 

 1837. Belonostomus tabulatus L. Agassiz. 



Ibid., p. 127 (name only). 

 1844. Belonostomus tenuirostris L. Agassiz. 



Poiss. Foss., Vol. II, Pt. II, pp. 143, 297. 

 1844. Belonostomus suhulatus L. Agassiz. 



Ihid., pp. 143, 297. 

 1863. Belonostomus tenuirostris A. Wagner. 



Abh. K. Bay Akad. Wiss., Math.-Phys., CI., Vol. IX, p. 691. 

 1863. Belonostomus tenuirostris var. brevivertebralis A. Wagner. 



Ibid., p. 691. 

 1873. Belonostomus tenuirostris V. ThioUiere, ed. P. Gervais. 



Poiss. Foss. Bugey, Pt. II, p. 24. 

 1881. Belonostomus tenuirostris B. Vetter. 



Mittheil. K. Mineral-geol. Mus. Dresden, Pt. IV, p. 85. 

 895. Belonostomus tenuirostris A. S. Woodward. 



Cat. Foss. Fishes Brit. Mus., Pt. Ill, p. 431. 

 1912. Belonostomus tenuirostris juv. C. R. Eastman. 



Ann. Carnegie Mus., Vol. VIII, p. 184, pi. X. 



Type. — Incomplete fish; present location unknown. 



"A species of very slender proportions attaining a length of about 30 cm. 

 Head with opercular apparatus occupying one-third of the total length; maximum 

 depth of trunk contained fourteen times in the total length. Cranium about nine 

 times as long as its maximum depth, having the snout excessively elongated and 

 projecting to some extent in advance of the anterior extremity of the mandible; the 

 pointed front end of the dentary bones suturally united with a deep re-entering 

 angle in the pre-symphysial bone; superficial ornament consisting of delicate rugse. 

 Vertebrae in the form of separated narrow rings, much deeper than broad. Scales 

 smooth or feebly tuberculated and rugose; those of the lateral line not much ex- 

 ceeding in depth the series below." (A. S. Woodward, I. c, Pt. Ill, p. 431-2). 



ThioUiere's recognition of this species in the paleichthyic fauna of Cerin is 

 stated to have been based upon two specimens showing the head, in which the 

 rostrum projects considerably in advance of the anterior extremity of the mandible. 

 A single specimen in the Carnegie Museum, catalogued as No. 4080, seems referable 

 to this species, judging from the characters of the head, proportions of the anterior 

 part of the trunk (which lacks the caudal region), and depth of the vertebral rings. 



