388 



SNODGRASS AND HELLER 



red ; sides bluish-black ; belly bluish-gray ; tip of snout dark blue ; 

 chin like belly; cheeks coppery; opercle black-bordered; iris silvery- 

 dusky with an inner red ring; spinous dorsal with spines cardinal, 

 membrane dusky ; rays of soft dorsal blackish, purple spot at base, 

 membrane black ; a large ocellus on side of soft dorsal with red margin 

 and dark blue center; pectorals, ventrals and anal dark, the last with 

 blue spots at the base posteriorly ; caudal lighter dusky, peduncle 

 very light; pectoral with light olive spot at tip. 



The young of different ages show the following changes : 



I. (Specimen 54 mm. long.) General color like that of adult. 

 Posterior part of caudal peduncle pale yellowish ; a large round black 

 spot on base of anterior part of soft dorsal ; a large quadrate white 

 spot (orange in life?) at tip of pectoral, ventrally dark color extending 

 between white spot and edge of fin. 



II. (Specimen 38 mm. long.) Color same as last with exception 

 of white on pectoral, which here forms a large oval spot, having 

 longer diameter longitudinal, very slightly in front of tip of fin. 



III. (Specimen 31 mm. long.) White spot on pectoral very small, 

 considerably in front of tip of fin, same shape as in last ; spot on base 

 of anterior part of soft dorsal conspicuously ocelliform, having a wide 

 pale border around the dark center (this character, however, probably, 

 simply faded from others), the whole encroaching much on the side 

 of the back. 



MEASUREMENTS, FIN RAYS AND SCALES OF PomacentruS Icu- 



corus. 



No. Stanford University Museum 



Length in mm 



Depth 



Head 



Pectoral 



Ventral 



Eje 



Interorbital 



Preorbital 



Number of dorsal spines 



Number of second dorsal rays 



Number of second anal rays 



Scale rows 



Scales on lateral line 



12272 



103 



52 



31 

 27 



32 

 27 

 30 

 14 



XII 



15 

 13 

 26 



Description of adult examples. — Almost identical in every respect, 

 except color, with Pomacentrus redeviptus^ the only differences 

 between specimens of equal length being as follows : Upper profile of 



