462 Davis—On the Fossil Fishes of the Chalk of Mount Lebanon. 
mentioned above. They are— 
Beryx niger: Sahel Alma. 
Omosoma sahel-alme : Sahel Alma. 
Imogaster auratus: Sahel Alma. 
Rhamphornimia rhinelloides. 
The last-named genus was probably an aggregate of fragments, not necessarily 
of fishes, because Messrs. Pictet and Humbert had reason to believe that they 
could distinguish the carapace of a crustacean in the specimen figured by M. Costa. 
In 1866, M. F. J. Pictet, in conjunction with M. Alois Humbert, published’ 
“Nouvelles recherches sur les poissons fossiles du Mont Liban.” The work 
was undertaken in consequence of the acquisition of a number of fossil fishes 
by M. Humbert during a visit to the two fish-bearing localities of Mount Lebanon. 
Many of these M. Pictet found to be new species, and some of them afforded 
information on undetermined characters in the species already described. He 
had also the opportunity to include in his description the examples deposited 
in the Museum of Natural History at Paris by M. Gaudry, as well as those 
preserved in the Paleontological Museum of the Academy of Sciences at Munich 
in the charge of Dr. Oppel. The work of Messrs. Pictet and Humbert, at the 
time it was written, was thoroughly comprehensive, and has to some extent 
served as the basis on which the superstructure of the present memoir is erected. 
It will be often necessary in the following pages to refer to it, and it is 
consequently not proposed to enter into a detailed analysis of the work at the 
present moment. The stratigraphical and paleontological relationship of the 
two fish-bearing beds of Hakel and Sahel Alma are discussed, and nine new 
species are added from the former locality and eight from the latter, besides 
transferring Mesogaster gracilis, Pictet, to Opistopteryx gracilis P. and H., and 
Beryx niger, Costa, to Pycnosterinx niger P. and H. 
The following is a tabulated list of the new species described by MM. Pictet 
and Humbert :— 
Beryx syriacus : Sahel Alma. = Pseudoberyx syriacus : Hakel. 
Cheirothrix libanicus: 55 P. botte: - 
Solenognathus lineolatus : os Clupea gaudryi: ‘ 
Leptosomus macrourus : in C. botte : 2 
L. crassicostatus : 9 Scombroclupea macrophthalma: __,, 
Spaniodon brevis : i Cheirocentrites libanicus : = 
Scyllium sahel-almee : 5 Leptotrachelus hakelensis : . 
Pycnosterinx elongatus : 3 Aspidopleurus cataphractus : a 
Rhinobatus maronita: si 
Including the species given above, the total number described was fifty-one ; 
