SHORE FISHES OF GALAPAGOS ISLANDS 399 



tral side whitish ; on the sides and rump vertical areas of white spots 

 and short bars form wide vertical bands much broken into by the 

 black ground color ; the first of these stripes begins beneath the third 

 and fourth spines and ends over the ventral fin ; the second runs from 

 the last 3 dorsal spines to the anus and the beginning of the anal 

 fin ; the third extends from the middle of the soft dorsal to the middle 

 of the anal ; the fourth, smaller than the others, surrounds the caudal 

 peduncle just in front of the caudal fin ; the fins in part have a pale 

 ground color spotted with black, and in part a dusky ground color 

 spotted with white." (Sitz. Akad. Wiss. Wien, LVI, 8). 



It is evident from the preceding that the pale vertical bands broken 

 with black of Kner's type represent the yellow (white in alcohol) in- 

 terspaces between the black bands of our specimens I and II, which 

 in III are invaded by secondary developments of black in the form of 

 broken bars. During growth from the age of the type to that of the 

 evenly spotted adult, the spreading process of the black must continue 

 until there is nothing left of the original yellow ground color but small 

 spots ; but also the yellow must invade the original black stripes form- 

 ing in them also similar spots ; so that, what was the pervading color 

 of the young, in the adult appears as punctate markings on a ground 

 color that appeared as striate markings in the young. 



A young example of Oplegnathus fasciatus from Japan in the 

 Stanford University collection agrees in coloration with our specimen 

 I, as far as the fifth stripe. The fifth stripe, however, extends from 

 the middle of the soft dorsal to the middle of the anal, thus having the 

 position of the broken interpolated stripe that appears in our specimen 

 III, between stripes 4 and 5. Stripe 5 on the anterior end of the cau- 

 dal peduncle and stripe 6 on the base of the caudal fin are lacking in 

 the specimen of O. faciatus, but on it there is present a continuous 

 band around the middle of the caudal peduncle on the position of the 

 lateral peduncle spots of our specimen III of O. insignis. 



The American species apparently differs from the species of the 

 western Pacific in having only 1 1 dorsal spines. Our largest speci- 

 men is 450 mm. in length. 



Family CH^ETODONTIDJE. 

 126. FORCIPIGER LONGIROSTRIS (Broussonet) . 



Chtztodon longirostris BROUSSONET, Dec. Ichthyol, i, 23, pi. 7, 1782, Society 



and Sandwich islands. 

 Chelmon longirostris, CUVIER VALENCIENNES, Hist. Nat. Poiss., vu, 89, 



pi. 175, 1831- 

 Chelmo longirostris, GUNTHER, Cat., n, 38. 



