PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 27 



less than ^ its height. The distance between the eyes equals ^ of their 

 long diameter. The maxilla extends to the vertical through the end of 

 the anterior third of the orbit. The preoperculum has a short, broad, 

 rather blunt spine at its angle and a much smaller one on its lower limb ; 

 between these two the margin in some specimens is creuulated, some- 

 times forming an additional blunt spine. The preopercular spines are 

 all hidden under the skin. 



The distance of the first dorsal from the snout is contained 2§ times 

 in length of body without caudal; its longest spine is ^ as long as the 

 head ; the length of its base is contained 5 times in length of body with- 

 out caudal, 6 times in total length; the length of the second dorsal base 

 is ^ of total length. The length of the anal base is ^ of length without 

 caudal. The length of the ventral is contained from 6 to Ci times in the 

 total length. The length of the pectoral is ^ of length of body without 

 caudal. 



The colors have faded, but the ground color seems to be plumbeous, 

 with occasional blotches of darker. The fins are more or less distinctly 

 puhctulated. The first dorsal is darker than the body and has a distinct 

 white margin. • 



Potamocottus Bendirei, n. s. 



The type of this species, catalogue Ko. 24190, was collected by Capt. 

 Charles Bendire, U. S. A., in Eattlesnake Creek, near Camx) Harney, 

 Oregon, May 2, 1878. I take pleasure in dedicating the species to this 

 excellent collector and observer, who has contributed so much to the 

 Museum. 



Description. — The length of the type is 2.7 inches (09'^^'^) to base of 

 caudal. The greatest height of the body at the origin of the dorsal 

 equals its greatest width over the base of the pectorals, and is con- 

 tained nearly 4 times in its length without caudal. The least height of 

 the tail is ^^ of the length without caudal. The length of the middle 

 caudal rays is contained 4.J times in length of body.* Width of the 

 mouth equals ^ the length of the head. 



The maxillary extends a little Dehind the front margin of the eye. The 

 snout is as long as the eye. The distance between the eyes is less than 

 their diameter, and is contained 5 times in the length of the head; the 

 diameter of the eye 4 times. The length of the lower jaw equals ^ the 

 length of the head. Preoperculum armed with 4 spines; the largest 

 is at the angle, and is about ^ as long as the eye ; the 3 anterior ones 

 are very small and hidden by the skin. The distance ot the spinous 

 dorsal from the snout is ^ of the length of the body ; the length of the 

 longest spine of the first dorsal is about ^ of that of the head and about 

 I of the longest dorsal ray. The longest dorsal and anal rays are equal. 

 The length of the anal base almost equals the length of the liead. 

 The length of the second dorsal base is a little greater than the length 

 of the head. 



* Lengtli of body here means length without caudal. 



