Vol. 5] Jordan. — The Fossil Fishes of California. 



129 



The genus Bogenio is characterized by the large head, sub- 

 equal and elongate jaws, slender vertebra 3 , and by the fact that 

 the dorsal and anal fins are equally developed, opposite each 



Fig. 23. Bogenio solitudinis Jordan. Miocene of Soledad Pass. Type 

 specimen. 



other, the front of each fin being near the middle of the length of 

 the body. 



In Bogenio solitudinis the head is about three and three- 

 fourths times in length to base of caudal; the greatest depth is 

 five. The month is elongate, oblique, the jaws subeqnal, appar- 

 ently extending to below the eye ; there are traces of small teeth 

 in the jaws ; the snout is pointed. The head is rather depressed 

 abov the eyes ; the vertebrae are forty to forty-two, small, about 

 twenty-two behind the vent ; no ribs are visible in any specimen. 

 The dorsal and anal are inserted a little behind the middle of 

 body. Each has about ten rays, or at least stand opposite eight 

 to ten vertebra 3 . The caudal peduncle behind the dorsal is about 

 equal to the length of the fins; the height of the dorsal and anal 

 is about three-fourths the length of the base. The caudal fin is a 

 little shorter than the head, and widely forked. I find no trace of 

 pectorals or ventrals in any specimen. The ventrals are probably 

 abdominal. No trace of scales is found in any specimen. 



The type example is one and one-fourth inches in length, very 

 slender and fragile, imbedded in white marl of Miocene Age. 

 There are twenty-nine specimens in Dr. Bowers' collection from 

 Soledad Pass, none of them very perfect, but most of them show- 

 ing the characteristic form, the opposite dorsal and anal, the 

 slender, almost eel-like, the depth ten times in length, the head 

 and body is vertically flattened. These range in length from one 

 to two inches. 



