24 



BULLETIN 214, UNITED STATES NATIONAL MUSEUM 



This species is characterized by having about 9 to 13 + 21 to 28 

 gill rakers; usually 5 median predorsal scales; in large specimens the 

 forehead becomes enlarged and fleshy so that the first and second 

 median anterior scales may become embedded; 2 rows of scales on 

 the cheek; usually ii,12, rarely ii,13 pectoral rays; teeth probably 

 green in adult and body with a plain dark ohve green coloration. The 

 young have 2 or 3 brown bars across under side of head, and the side 







Figure 3. — a, Adult Scarops perrico, modified after Osborn and Nichols ('=Callyodon mi- 

 crops, type) large adult, dark spots on head were green when alive; b, young after Hilda- 

 brand {'=Scarus hildebrandi Kanazawa). 



of body is indistinctly barred. The tail is rounded in young and 

 becomes truncate or slightly forked in large adults. A specimen 430 

 mm in standard length (lent by Dr. Walker) has dark blue-green 

 median fins, and green paired fins. 



In addition to the types I have studied 4 lots from Panama, one from 

 Chatham Bay, Cocos Island, and 6 from the Gulf of California, the 

 latter loaned by Dr. Boyd Walker, University of California at Los 

 Angeles. 



