338 ACIPENSERIDiE. 



p. 177; Gesner, Aquat. p. 57; Aldrov. p. 56G: Jonston, Pine. 



tab. 25. fig. 4; Wmuf//tb>/, -p. 24i. 

 Huso, Albert. Magn. i)e Anim. lib. .xxiv. ; Gesner, Aquat. p. 50 ; 



Aldrov. p. 534 ; WiUuyhbi/, p. 24.",, tab. P 7. fig. 1 ; JoTV^tm, IHsr. 



p. 116, tab. 25. fig, 13 ; 3iarsil. Danub. Pan. Miju. iv. p. 31, tab. 10. 



dg.l. 

 Antaceus borysthenis, Rondel. Be Pisc.fluv. p. 187; Gesner, Aquat. 



p. 66 ; Aldrov. p. 564. 

 Acipenser, sp., Artedi, Syn. p. 92. no. 2 ; Gen: p. 65. no. 2 ; Klein, 



Pise. Miss. iv. p. 14. 

 huso, L. Si/sf. Nat. xii. p. ■104; Gilldenst. Nov. Comm. Petrop. 



xvi. p. 532; Lepechin, lieise im Rin^a. Reich, i. p. 158, tab. 11. 



figs. 1 & 2 ; PL i. p. 70, tab. 1 2!) ; PL Sclm. p. 348 ; Lacep. i. p. 422 ; 



Pallas, Reise, i. p. 131, ii. p. 330 ; Zoor/r. Ross. -As. iii. p. 86, tab. 13 ; 



Meidinger, tab. 49; Prandt 8f Rntzcb. ii. p. .3, taf. 1. fio-. 1, taf. la.- 



fig. 1 ; Lovetzky, Nouv. M6m. Hoc. Nat. Mosc. iii. p. 258, tab. 15. 



fig. 1 ; Fitz. ^- Heck. Ann. Wicn. Mxs. i. p. 320, tab. 27. fig. 7, 



tab. 28. figs. 1 & 2 ; Heck. ^- Kner, p. 365. 

 Beluga, Gmel. Reise Russ. iii. p. 240. 

 Acipenser beluga, Forst. Phil. Trans. Ivii. p. 532. 



Snout without osseous shields above, pointed, of moderate length, 

 much shorter than thf remaining part of the head. Barbels flattened, 

 nearer to the eye than to the end of the snout. Parietal plates 

 much smaller than temporals. Dorsal shields 12-13 (-15), lateral 

 40-45 (-60 ?), very small. Skin with very small rough points. 

 D. 14/49. 



Black Sea and Sea of Azow, with their rivers. Occasionallv in 

 the Mediterranean. 



9. Acipenser sinensis. 



Acipenser sinensis. Gray, HI. Ind. Zool. c. fig., & Proc. Zool. Soc. 



1834, p. 122. 

 ?? Acipenser mantschuricus, Pasil. Noiiv. Mem. Soc. Nat. Mosc. x. 



1855, p. 250. 



Snout pointed, long, its length being considerably more than that 

 of the remaining part of the head (in an example 12^ inches long). 

 Barbels short and thin, much nearer to the eye than to the ex- 

 tremity of the snout. Osseous shields well developed, 17 along 

 the back, and 40-41 along the side. Shin entirely naJced. A ver- 

 tical line of minute ossifications between proeoperculum and oper- 

 culum. About one-half of the anal fin is below the dorsal. D. 50. 



China. 

 a, h. Types of the species. Presented by J. R. Reeves, Esq. 



10. Acipenser rubicundus. 



Ijcsiieur, Trans. Am. Phil. Soc. i. 1818. p. 388, pi. 12 (cop. by Dekay, 

 New York Faun. Fish. p. 344, pi. 58. fig. 191) ; Richards. Fatin. 

 Bor.-Amer. iii. p. 284 ; P'itz. 1^- Heck. Ann. Wien. Mus. i. p. 316. 



U Snout short, somewhat roundish, much shorter than the remain- 

 ing portion of the head. Barbels nearer to the extremity of the 

 snout than to the eye. Osseous shields very small ; 9-12 on the 

 back, distant from one another; 34-35 along the side, also distant; 



