DISCUSSION OF SPECIES AND THEIR DISTRIBUTION. 285 



of the pectoral of the right side {.'24:4). The length of the operculum to end of flap (.11) is 

 ^ of total length. The length of the upper jaw (.15) eiiuals i the heiglit of the body at the 

 ventrals, and is contained 2i 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 rcacli 

 the perpendicular through the middle of the orbit; the length of the labial ai)pendage is 

 slightly more than half the long diameter of the orbit and one-third the length of the first 

 pectoral ray. The length of the mandible (. 1.j(>) 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 

 Gi times in the length of tlie head. The operculum and preopercnlum are scaly; the latter 

 is finely denticulated on its posterior margin. The distance of the posterior 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 sui)i)lied with an outer 

 series of about lit canine teeth, and behind these a band of villiform tec-th, widest at the sym- 

 physis. The mandible has a few large canines and an inner series of small conical teeth 

 continued from a patch of similar teeth at the symphysis; vomer and palatines toothless. 



The distance of the adipose dorsal from the snout (.200) 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 ven- 

 tral from the snout (.347); its length of base (.144) equals the length of the caudal peduncle. 

 The first spinels imperfect — what remains of it is one-third as long as the third spine (.09). 

 The second spine (.082) is about equal to the width of the interorbital area. The fourth and 

 the sixth spine are equal in length (.097) and equal the distance from the end of the snout 

 to the posterior nostril. The fifth spine (.095) is a little shorter than the sixth. The last 

 spine, seventh, 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 tlie snout. 

 The thirteenth 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 thirteenth. The thirteenth ray of the soft 

 dorsal extends to the origin of the external 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 first anal spine (.04) is half as long as the second dorsal spine. 

 The second anal spine (.075) is half as long as the upper Jaw. The first ray of the anal (.102) 

 is as long as the last spine of the dorsal. The eleventh and longest anal ray (.134) is con- 

 tained 7i times in the total length, and nearly e(iuals the length of the middle caudal rays. 

 The last anal ray (.078) is half as long as the mandible. The eleventh ray of the anal 

 extends almost to the perpendicular through the origin of the middle caudal rays. 



The caudal is emarginate, the external rays being only l.i times as long as the middle 

 rays. The length of the superior external rays (.210), measured from the origin of the mid- 

 dle rays, equals li times the length of the spinous dorsal base. 



The distance of the pectoral fi-om the snout (.32) very slightly exceeds the length of 

 the anal base. The length of the pectoral of the right side (.244) equals twice that of the 

 snout. The pectoral of the left side is probably imperfect, its length (.210) being equal to 

 that of the superior external caudal rays. The right pectoral can be made to reach the vent ; 

 in its natirral position it extends to the perpendicular let fall from the fourth ray of the 

 second dorsal. 



The distance of the ventral from the snout (.347) equals 4 times the least height of 

 the tail. The length of the ventral (.183) equals twice that of the third dorsal spine, and 

 it extends to a point under the third dorsal ray. The distance from the tip of the ventral 

 to the vent ecpials half the length of the middle caudal rays. The vent is under the inter- 

 val between the fourth and fifth dorsal rays. 



Color. — The following notes upon color were taken from a fresh specimen. The colors 

 are very beautiful, and in general appearance when taken from the water it is one of the 

 loveliest fishes we have ever seen, no excei>tion being made in favor of the brilliant parrot, 

 fishes or angel-fishes of the West Indian coral groves. 



