co!ori', pticii prrmagnis roluiidiiti-s toidliiue (iihi 



aniici) ohl'ujui utidatd, plicis urea dur.wUn podica- 



■siin-iiiii diverffeiUidiis, costd umbunali tiulld, luiiuld 



pnrcd ; vmboiiibus satis emiue/itibjis, nali/ms obliquis. 



margnrild iilbd, arillce aulem salijinrpn 



ridesn-Hle , 



dciitlhns ctirdiiiuUhM magiiis, hiciiiinth. piiriimidiiJihim. 

 TllK BLACK-KIBBED UnIO. Slldl luigr, toliii, sub- 



rliombic, especially inequilateral, veiitricosc. of an 

 uniform olive colour, everywhere (except in front) 

 obliquely waved by a few very big rounded folds, 

 of which those on the rimbonal slope diverge up- 

 wards, with no umbonal ridge, a small lunule ; 

 uud)oes moderately projecting, beaks slanting, naen- 



white (becoming however iridr 



tinged with purple nnteriurly) ; 



jagged, jjyramidal. 

 Lea, Trans. Amer. Phil, «oc. ser. 2. 



Obs. vol. iv. ]). 44. 

 Uah. Alabama and Louisiana, X. Am. 



This is not the species eiToneoush 

 Plate IV., which seems merely lieroi 

 closer to the plicr/l lis of Plate \' . It i 

 from the perplicaiiis as represented ii 

 considered by Conrad to be a syiion 

 (Proe. Philad". vol. i. p. 17). 



slightl.N 

 eth big. 



so designated in 

 ,• it comes much 

 perfectly distinct 

 Plate LX., but is 

 m of his species 



