POMACENTRIDAE. 135 



Nine specimens, Nos. 3226, 3262, 3263, M. C. Z. 29672, and 3272-77, 5 to 7 

 inches long from Wreck Bay, Chatham Island. No. 3262, M. C. Z. 29637, No. 

 3272, M. C. Z. 29691, No. 3274, M. C. Z. 29668, No. 3275, M. C. Z. 29682, No. 

 3276, M. C. Z. 29629, No. 3277, M. C. Z. 29688. 



Twenty-nine specimens, 1? to 4; inches long among coral in two fathoms of 

 water and one specimen, No. 3133, 75 inches long, all from Toboguilla Island, 

 Panama Bay. 



Thirty-two specimens, 1 to 4* inches long from Perico Island, Panama Bay, 

 in tidal pools and among coral in two fathoms of water. 



Twenty-one specimens, 2i to 4? inches long, and two specimens, Nos. 3369- 

 70, 4| and 7 inches long, all from Acapulco. 



Abudefduf declivifrons (Gill). 



Jordan, Proc. Cal. Acad. Sci., 1895, ser. 2, 5, p. 476. 



Etischistodus declivifrons Gill, Proc. Acad. Nat. Sci., Phil., 1862, p. 146. 



Two specimens 2? to 3? inches long from Toboguilla Island, Panama Bay, 

 among coral in two fathoms of water. Al. C. Z. 29562 (1 specimen). 



Seventeen specimens 5 to I4 inches long, Perico Island, October 26, 1904, 

 in pool. 



Three specimens 42 to 6j inches long, Nos. 3371-3, Acapulco, February 28, 

 1905. No. 3373, M. C. Z. 29632 (1 specimen). 



The 6i inch specimen had head 3.02 in length; depth 1.65; eye 3.72 in head; 

 suborbital 5.85; interorbital 2.73; dorsal XIII, 13 (12); anal II, 11 (10). In 

 another specimen the dorsal was XIII, 13 (12); anal II, 12 (11); another had 

 dorsal XIII, 14 (13); anal II, 11 (10). 



The young are easily distinguished from the young of A. saxatalis by the 

 direction of two of the bands; in A. saxatalis the band from about the middle 

 of the spinous dorsal runs downward and slightly forward to the belly, somewhat 

 in front of anal; and the band from posterior part of spinous dorsal extends 

 downward and forward, nearly parallel with other toward front of anal. In A. 

 declivifrons the band from spinous dorsal extends downward and backward to 

 front of anal. The band from the posterior part of spinous dorsal extends down- 

 ward and backward to about the middle of anal ; each band is of about uniform 

 width; in A. declivifrons they are broader dorsally, becoming narrower ventrally, 

 making them appear divergent. In A. declivifrons the bands above the lateral 

 line are much darker, making the pale interspaces appear more distinct (spot- 

 like). 



