103 FISHES OF SINAL.OA. 475 



differences between the two are comparatively slight but 

 very persistent, and we believe that the two species are 

 fully distinct from each other. In life Eupomacentrus 

 flavilatus is the most beautiful fish found on the coast of 

 Mexico, showing a most intense shade in the blue of its 

 back and the orange of its sides. Both this species and 

 the preceding were found at Cape San Lucas, but only 

 Eupomacentrus rectifranum has been taken at Panama. 



An irregular line from snout below eye to soft dorsal 

 divides the fish into two parts ; below this line all is bril- 

 liant yellow with an orange shade, deepest on anal; above 

 all is the brightest sky blue. Scales darker, but all edged 

 with sky blue, six sky blue stripes on upper part of head. 

 An indigo spot on base of first soft dorsal and last dorsal 

 spines extending on back, this surrounded by a ring of 

 sky blue; a similar smaller ocellated spot on back of 

 caudal peduncle. 



173. Abudefduf* saxatilis (Linngeus). 



Common in rock pools about Mazatlan, where it was 

 obtained in abundance by Dr. Gilbert and by us. The 

 largest specimens were taken by dynamite off the Vena- 

 dos Islands. 



Careful comparison of these specimens with others 

 from the West Indies shows no difference whatever. 

 Glyphisodon troschcli Gill, the name given to the Pacific 

 Coast form, is therefore fully synonymus with Abudefditf 

 (or Glyphisodon) saxatilis. 



In life, bright greenish yellow above with steel blue 

 bands. Dorsal like back; other fins dusky; axillary spot 

 faint. 



In alcohol, the color is a slaty brown tinged with red- 



* Abudefditf Forskal seems to be identical with Glyphisodon and is en- 

 titled to priority, notwithstanding its barbarous form. 



