ADDENDA 103. URANOSCOPID/E ASTEOSCOPUS. 941 



serrate. Soit dorsal and anal angular behind. D. XIII, 10; A. Ill, 

 17; scales C-42-I7. {G'Jnthcr.) West Indies, north to Florida Keys. 



(L. Syst. Nat.; Giintliei-, ii, 1-2.) 



Page C15. After PQmacanthuH cUlaris add: 

 »64 (ft). P. tricolOB' (Bloch) J. &, G.— Black Angel. 



Head, caudal fin, anterior jiart of trunk, and margins of soft dorsal 

 and anal yellow; rest of body black. Preopercular spine grooved, 

 reaching to posterior margin of opercle. Soft dorsal, anal, and upper 

 ray of caudal, moderately produced. D. XIV, 19; A. Ill, 18; scales 

 8-48-25. {Gllnthe}'.) West Indies, north to Florida Keys. 



{Cliaitodoii tricolor Bloch, Iclitli. xii, 1797, taf. 4"35: Holacanthus tricolor Q. & V. vii, 

 16'2: Holacanthus tricolor Giintlior, ii, 49.) 



Page G17. After Acanthnrus chirurgus add: 

 966 {h). A nig:i>icans (L.) Bloch. 



Closely related to Acanthnrus chirurgus^ difiering in the longer snout, 

 which is more convex in its upper portion. Caudal triangular, scarcely 

 concave behind; vertical bands on the side very narrow, usually dis- 

 appearing after death; fins without oblique stripes. {Pocij.) West In- 

 dies, occasionally northward (said to have been once taken at Xew 

 York). 



{Chatodon tiigricaus Limi. Syst. Nat.: Acanthnrus phleiotomus Cuv. &, Val. x, 176, 

 tab. 2f7, 18:J5: Acanthnrus phlehotomus Vo^j, Anal. Soc. Esp. Hist. Nat. IfcSO, 24.5.) 



966 {c). A. trstctus Poey. 



Distinguished most readily by the length of the caudal lobes, especi- 

 ally the upper, which is notably longer than the lower, its tip ending 

 in a whitish thread; anterior profile moderately curved. Dorsal with 

 faint oblique streaks. Body usually without dark streaks. West In- 

 dies and both coasts of Me iico, occasional northward. 



(Acanihurus chirurgus C. & V. x, 108 (not Chwtodon chirurgus Bloch); Poey, Mem. 

 Cuba, ii, 208, 18G0; Poey, Anal. Soc. Esp. Hist. Nat. 1880, 24G.) 



Page 628. AstroHcnptm y-gncvum and A. anoplm are very closely re- 

 lated. The following distinctive characters may be found useful: 



In A. anoplus the i)ale spots are niu(;h smaller, less sharply defined, 

 and occupy a smaller area than in A. y-grcecum ; the lower part of head 

 has two black blotches in both species; the second dorsal, anal, and 

 ventrals are nearly or quite plain. The naked area behin<I each eye is, 

 in A. anoplus^ lunate, its length barely twice that of the snout; the bony 

 V-shaped plate is short and broad, concave on the median line, and 

 forked for about half its length, the posterior undivided portion broader 



