206 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



(.11) is ^ of total length. The length of the upper jaw (.15) equals ^ 

 the height of the body at the ventrals, and is contained 2^ times in the 

 length of the head. The maxilla extends to the perpendicular through 

 the anterior margin of the orbit ; the mandible does not quite reach the 

 perpendicular through the middle of the orbit ; the length of the labial 

 appendage is slightly more than half the long diameter of the orbit and 

 ^ the length of th^ 1st pectoral ray. The length of the mandible (.156) 

 slightly exceeds the distance from the snout to the orbit (.15), and equals 

 3 times the long diameter of the eye (.052), which is contained 6i times 

 in the length of the head. The operculum and preoperculum are scaly ; 

 the latter is finely denticulated on its posterior margin. The distance 

 of the j)osterior nostril from the eye equals the length of the first anal 

 spine ; the distance between the anterior nostril and the end of the 

 snout is twice as great. The intermaxillaries are supplied with an outer 

 series of about 19 canine teeth, and behind these a band of villiform 

 teeth widest at the symphysis. The mandible has a few large canines 

 and an inner series of small conical teeth continued from a patch of simi- 

 lar teeth at the symphysis ; vomer and palatines toothless. 



The distance of the adipose dorsal from the snout (.206) equals nearly 

 3 times its height (.07) ; its length of base (.123) equals the length of 

 the snout. The height of the adipose dorsal equals the distance from 

 the tip of the ventral to the vent. 



The distance of the spinous dorsal from the snout (.347) equals the 

 distance of the ventral from the snout (.347); its length of base (.144) 

 equals the length of the caudal peduncle. The 1st spine is imp&rfect — 

 what remains of it is ^ as long as the 3d spine (.09). The 2d spine 

 (.082) is about equal to the width of the interorbital area. The 4th 

 and the 6th spine are equal in length (.097) and equal the distance fi-om 

 the end of the snout to the posterior nostril. The 5th spine (.095) 

 is a little shorter than the 6th. The last spine (7th) is contained 10 

 times in the total length. The length of the first ray of the soft dorsal 

 (.094) equals the distance between the anterior nostril and the end of 

 the snout. The 13th, and longest ray (.147), about equals the length of 

 the base of the spinous dorsal. The last ray (.07) is half as long as the 

 13th. The 13th ray of the soft dorsal extends to the origin of the ex- 

 ternal caudal rays. 



The distance of the anal from the snout (.60) is about equal to twice 

 the height of the body at the ventrals. The length of the anal base 

 (.318) is slightly more than twice the length of the mandible. The 1st 

 anal spine (.04) is half as long as the second dorsal spine. The 2d 

 anal spine (.075) is half as long as the upper jaw. The 1st ray of the 

 anal (.102) is as long as the last spine of the dorsal. The 11th, and 

 longest anal ray (.134), is contained 7i times in the total length, and 

 nearly equals the lengtli of the middle caudal rays. The last anal ray 

 (.078) is half as long as the mandible. The 11th ray of the anal extends 

 almost to tlie perpendicular through the origin of the middle caudal 

 rays. 



