120 ^'EW YORK ZOOLOGICAL SOCIETY 



the large tanks of the Xew York and Bermuda Aquariums, and 

 the specimens were not tested in the photograpliic tank. 



Queen Trigger-fish, (Balistcs vctula). This wonderfully 

 marked fish has three phases of coloration : one dark, another pale 

 and a third with the fins almost black. The usual blue markings 

 persist in all three without change, except in intensity. In the 

 dark phase, wdiich is the customary dress, the head, below the blue 

 lines, is rich golden yellow, all blue markings are brilliant, the 

 body and fins dusky olive, especially above. 



The pale phase is quite a change from this, the whole body 

 becoming yellowish, white, the blue markings still persisting 

 faintly. 



The coloration shown on plate 39. Pishes of Porto Rico, is that 

 of a dead and half-faded specimen. 



Live specimens observed in Bermuda frequently showed the fins 

 black, tlie lower part of the body rich pur])lish blue. 



Cow Fish, (LocfopJirys tricornis). Phase i : A uniformly pale 

 or yellowish olive phase, with purplish blue reticulations very 

 distinct. 



Phase 2: Large, very dark blotches spread over body and tail, 

 blue reticulations scarcely apparent. 



Phase 3: Whole body light brown, blue reticulations becoming 

 dusky. 



Blue-Head, (Clilorichfhys bifasciafits) . Phase i: Hinder 

 half of body indigo blue, like the head, the black-bordered whitish 

 band between, taking a bluish cast. 



Phase 2 : A sudden change from this leaves the hinder half of 

 body pale greenish yellow, upper and lower rays of tail bluish 

 black and the white band showing pure white. 



"Cluck," (The Bermuda name) [Pqiics acinniiiatiis). Pale 

 phase: Pale silvery, the longitudinal rich brown stripes of body 

 very distinct; first half of spinous dorsal rich brown. 



Dark phase: I'niformly dusky brown on body and fins. Two 

 or three darker vertical bloiches occasionally ap})earing. 



Note. — Mr. L. 15. S])encer has kindly furnished phoiograi^hs of 

 vellow-fin gr()U])er, lidgfislL red-jiarrol and trigger-hsh. 



