FAMILY AIUR^NID^ 

 J. Z. Gilbert 



Dcprandns Lcstcs. (Jordan & Gilbert, new genus and species. 

 Widi Plate. 



The type of this muray (201 A) from El Modena, diatomaceous 

 shale, was sent to me by Dr. Gilbert, a lower-jaw, ZlA inches 

 long. It is slender, straight, curved upwards toward the tip, and 

 shows a single row^ of strong, conical sharp teeth, somewhat 

 thickened at base, rather close-set, the interval being a little more 

 than half the length of a tooth. The teeth on the middle of the 

 jaw are a little larger than the others, those in the posterior third 

 of the length are more slender, close-set and apparently in a 

 band, rather than a single row, all the teeth directed more oi 

 less backward. There is no trace of lancet-like teeth or of 

 canines. Tip of the lower jaw apparently turned upwards. On 



the fossil are traces of the teeth of the other or right side of 

 the jaw, indicating that the mouth was narrow as well as long. 



Another half of a lower jaw (200A) also from El ^lodena, 

 retained by Dr. Gilbert, is slightly larger, but shows no differ- 

 ence. 



The type specimen was obtained from the fossil collection of 

 Mr. E. E. Hadley. 



Another lower jaw from a much larger fish (No. 571) sent 

 to me from Alhambra, Los Angeles County, by Mr. E. E. Had- 



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