34 



ZOOLOGY. 



List of sjyecimens. 



69. ACIPENSER ACUTIROSTRIS, Ayres. 



Body subfusiform. Head slender and depressed ; snout tapering and acute. Eleven dorsal 

 shields from the occiput to the anterior margin of the dorsal fin ; twenty-seven shields in the 

 lateral series, and nine between the pectorals and the ventral fins. Greyish black above ; 

 yellowish white beneath. 



List of specimens. 



70. ACIPENSER MEDIKOSTBIS, Ayres. 



Body fusiform. Head stoutish ; snout rounded anteriorly, and abbreviated. Eleven dorsal 

 shields from the occiput to the anterior margin of the dorsal fin ; thirty-seven shields in the 

 lateral series, and nine between the pectorals and ventral fins. Reddish brown above ; yel 

 lowish beneath. 



List of specimens. 



