396 Bulletin Atnerican Museum of Natural History. [Vol. XIX, 



between 2500 and 3000 feet. In both places there are clear 

 evidences of faulting by which the fish-bearing strata have 

 been let down into the midst of older strata. Those at Hakel 

 have been let down to the level of the hippurite limestone of 

 Lebanon, being above the Trigonia sandstone. Professor Day- 

 thinks that the Hajula beds are an extension of those at 

 Hakel. This study of the fishes appears to show that the 

 horizon of the beds at Hajula is some what higher than that of 

 the beds at Hakel. Professor Day says that one notable differ- 

 ence is found in the great abundance of crustaceans at Hajula. 



According to Professor Day, the fish-bearing strata at 

 Hakel are exposed over a space of half an acre or more on 

 the side of a valley, which slopes about 30° to the northeast, 

 the dip of the strata corresponding nearly with the slope. The 

 outcrop at Hajula is similar, but more broken up and irregu- 

 lar. At both localities the slabs of rock which lie on the sur- 

 face are more easily and perfectly split than are those which 

 are dug up from some depth. 



Professor Day was not permitted to work at Sahel Alma. 



Much credit is due to the Rev. D. Stuart Dodge, at whose 

 suggestion and expense this collection was made, and to Pro- 

 fessor Day, who has displayed great industry and good judg- 

 ment in gathering the materials. 



At the close of this paper the writer will add a few words 

 on the age of the strata. 



In the following pages most of the specimens are recorded 

 under two numbers, of which the second is enclosed within 

 parentheses. The first number is the one given to the speci- 

 men in the Department of Geology, while the number in 

 parentheses is the one which it bears in the general catalogue 

 of fishes. This catalogue belongs to the Department of Ver- 

 tebrate PalcBontology. 



Figure 2, Plate xxvi; figures 3 and 4, Plate xxxvi; and 

 figures 4-6, Plate xxxvii, have been reproduced from photo- 

 graphs made by Mr. A. E. Anderson. Figures 3 and 4, Plate 

 XXVI, are from drawings made by Mrs. L. M. Sterling. All 

 the other figures are from photographs made by Mr. Rudolph 

 Weber. 



