1. ALIP£NSEK. 339 



none on the ab'IomenC?). Skin marked throughout with siaaU 

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

 D. 40. (Lesneur.) 



Great lakes of North America. 



The specimen described Avas 4 feet long. 



11. Acipenser maculosus. 

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



p. 39.'3 ; Fitz. Si- Heck. Ann. Wien. Mns. i. p. 285 ; Kirtland, Host. 



Joiirn. Nat. Hid. iv. p. .".03, pi. 14. fig. 1. 

 rupertiauus, Ricliards. Faun. Bor.-Amcr. iii. p. 311, pi. 97. 



carbonarius, A(/asf:iz, Lake Super, p. 271, pi. 5. 



rhynclueus, Arjassiz, I. c. p. 27* '> 



tliompsoni (specimen of Free- Ivirk College Museum), J2tc/iarcfe. 



in Yarr. Brit. Fish. 3rd edit. ii. p. 4oG *. 

 (Huso) maculosus, Dum&ril, Nouv. Arch. Mns. iii. p. 159 (name 



only). 



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



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



( ) buti'alo, 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. Barbels nearer to the eye than to the ex- 

 tremity of the snout. 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. D. 37-45. Body generally 

 with some irregular blackish spots. 



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



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

 prickly, with scarcely any stellate ossifications ; dorsal shields 

 13, lateral 34-36, those on the tail large, deeper than long 

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



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

 Skin with numerous irregularly scattered stellate ossifications ; 

 dorsal shields 14, lateral 38, those on th ; 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 oblique series ; 

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



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

 been enabled to examine this example, and to convince myself that it belongs to 

 this American species. Dr. Duns has 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. sturioides may be the same fish (seo 

 p. 3.33). 



z2 



