1917.] NATURAL SCIENCES OF PHILADELPHIA. 135 



fin otherwise like dorsal. Caudal with hind edge rounded. Pectoral 

 small, first rudimentary ray short and as concealed thorn, fin extend- 

 ing 1| to anal, ^'entral inserted slightly behind pectoral origin, fin 

 reaching half way to vent. 



Color in alcohol largely dull brownish, lower sides and under 

 surfaces paler to whitish. Upper surface of head with slaty tints. 

 Teeth whitish. Iris pale yellowish. An obscure dark brownish 

 lengthwise band from eye to upper caudal base. Below a similar 

 shorter band, parallel, from pectoral axil back to lower caudal base. 

 ^"ertical fins all pale dusky, lower anal edge whitish. Outer pectoral 

 base dusky above, fin pale. Ventral whitish. Scales below lower 

 dark lateral band on each side of median ventral row, each Avith 

 white median spot, and those of lowermost row largest. 



Length, 138 mm. 



Type, 46,960, A. N. S. P. Colon, Panama Canal Zone. 1916. 

 David E. Harrower. 



Only the above known, and evidently allied with CaUyodon tris'pino- 

 sus (Valenciennes), but that species has been described as uniform 

 reddish-brown. Another allied species is CaUyodo7i aracanga (Gun- 

 ther) w^hich is uniform dark violet-purple and with the median fins 

 very dark. The present species differs from these, as Avell as the 

 others in the genus by its dark lengthwise bands and pearly-white 

 abdominal spots. 



(Margarita, a pearl, with reference to the white spots on the 

 abdomen.) 



Chaetodipterus faber (Broussonet). 



Four, 95 to 135 mm. 



Chaetodon ocellatus Bloch. 



One, 98 mm. 

 Chaetodon capistratus Linn6. 



Two, 75 and 80 mm. 

 Angelichthys ciliaris (Linne). 



One, 145 mm. 

 Hepatus hepatus (Linn6). 



Two, 105 and 128 mm. 



Hepatus bahianus (Castelnau). 



One, 132 mm. 

 Alutera punctata Agassiz. 

 One, 195 mm. 



