1. AlIPENSER. 339 



7ioiie on the aMoinen (?). Skin marked throdghout with Biuall 

 groups of apincs. The greater part of the anal below the dorsal. 

 D. 40. {Lemeur.) 



Great lakes of North America. 



The specimen described was 4 feet long. 



11. Acipenser maculosus. 

 Acipenser maculosus, Lesiieur, Trans. Am. Phil. Soc. new ser. i. 



p. 39.3 ; Fitz. ($• Heck. Ann. Wien. Mtis. i. p. 285 ; Kirtland, Host. 



Journ. Nat. Hist. iv. p. .303, pi. 14. fig. 1. 

 rupertianus, Richards. Faun. Bor.-Amer. iii. p. 311, pi. 97. 



fig. 1. 



carbouarius, Agassiz, Lake Super, p. 271, pi. 5. 



rliyncliiBus, Ar/assiz, I. c. p. 27<3. 



tliompsoni (specimen of Free-Kirk College Museum), Richards. 



in Yarr. Brit. Fish. 3rd edit. ii. p. 456 *. 

 (Huso) maculosus, JDuni^ril, Nouv. Arch. Miis. iii. p. 159 (name 



only). 



( ) rupertianus, Dumeril, I. r. (name only). 



(Antaceus) Cincinnati, Dumeril, I. c. p. 174, pi. 14. fig. 2. 



( ) buffalo, Dumeril, I. c. p. 175, pi. 14. fig. 1. 



Snout with small osseous plates above, pointed, produced, its 

 length being equal to, or not much shorter than, the remaining part 

 of the head, in examples to three feet long ; it is somewhat longer 

 in very young examples. Earbels nearer to the eye than to the ex- 

 tremity of the snoiit. Osseous shields well developed, 13-16 along 

 the back, and 33-38 along the side. Skin rough, sometimes simply 

 prickly, sometimes with more or less numerous irregularly scattered 

 larger stellate ossifications, sometimes with those ossifications scale- 

 like and arranged in more or less regular series. The greater part 

 of the anal fin is below the dorsal. T>. 37-45. Body generally 

 with some irregular blackish spots. 



Coasts and rivers of Arctic and Eastern North America ; ? Scotland. 



a. Twenty-three inches long : stutFed. Gulf of Florida. — Skin 



prickly, with scarcely any stellate ossifications ; dorsal shields 

 13, latei'al 34-36, those on the tail large, deeper than long 

 (this would be a species of Huso according to Dumeril). 



b. Three feet long: stuffed. Ohio. Purchased of Mr. Parnell. — 



Skin with numerous irregularly scattered stellate ossifications ; 

 dorsal shields 14, lateral 38, those on the tail small, deeper 

 than long (this would be a new species of Antaceus according 

 to Dumeril). 



c. Twenty inches long. Montreal. Purchased of Mr. "Wright. — 



Stellate ossifications scale-like, and arranged in obhque series ; 

 dorsal shields 15, lateral 36, those on the tail rather small, 



* Through the kindness of Dr. Duns, of the New College, Edinburgh, I have 

 been enabled to examine this osample, and to convinee myself that it belongs to 

 this American species. Dr. Duns ha.s the very strongest impression that the 

 specimen was obtained from the Firth of Tay. In this case A. maculosus would 

 occasionally occur in Europe ; and A. siurioidcs may be the same fish (see 

 p. 3.3,3). 



z2 



