;5-5i) ACiPi;.\si;i;ii).i;. 



Acipenser nucliventriji, Lovetzlii, Nov. Maij. Jestveiin. ii. im. ], and 

 Nouv. Mem. Sor. Xat. .}fosc. "iii. p. 2(50, tab. 15. fig. l>. 



marsiglii, Bnindi *.V liutzeh. ii. p. .'}")2. 



scliipa, Lvvcfzki/, I. c. p. 2rtO, tab. 17. Hg.s. H \- 4 (young). 



Snout rather short, rouiulcd ; botlt halves of the lower lip coii- 

 ti2:uous ; barbels slightly fringed. Dorsal shields well develnjted. 

 I'2'IG; lateral sliields small, numerous, GO. Skin densely eovered 

 with small denticulated ossifications. D. 4.'i. 



Black Sea and Sea of Azow, with their rivers. 



3. Acipenser braudtii. 



Acipen.ser schvpa, liraitdt ^- liatzeh. ii. p. ;'>5(), tab. 1«. iig. 2, F-]\. 

 (not p. 20, tab. 1. fig. :'>). 



Snout rather pointed, the barbels, which are simple, being iieaivr 

 to the mouth than to tlie extremity of the snout ; the halves of tlie 

 lower lip separated by an interspace. iJorsal shields rather small, 

 13 ; lateral shields small, 4l'-51. The upper part of the siiout with 

 small, not contiguous, shields. Skin with numerous very small di'ii- 

 tieidated ossifications. {B. tj- R.) 



Black and Caspian Seas, with their rivers. 



Golowatschof believes that this is a hybrid lietween A. Jim^a and 

 A. scliiipa (Bull. Soc. Nat. ]\[osc. 1857, ii. p. 541 ). 



4. Acipenser transmontanus. 



Acipenser transmontanus, Riehardf:. Faini. Bdr.-Aincr. iii. p. 27>^, 

 pi. 97. 



Snout osseous above, pointed, of moderate length, much shorter 

 than the remaining part of the head. ]^arbcls not flattened, mucli 

 nearer to the end of the snout than to the mouth. The halves of 

 the lower lip separated by a wide intereijace. The parietal aiul 

 temporal plates subcqnal in size. Dorsal sliields 12-14, lateral 

 42-47, small. Skin studded with small, scattered, stellated tu- 

 bercles of various forms and sizes. The greater part of the anal 

 below the dorsal. D. 45-52. 



Columbia Kiver ; California. 



a-b. Seventeen and thirteen inches long. CaHfornia- From the 

 Godeffroy Museum. 



5. Acipenser naccarii. 



Acipenser huso, Naccari, lit. Adr. p. 2;3 ; ^ardo, Vrodr. Adr. Ichfh. 



sp. 36. 

 ^ naccarii, Bonap. Faun. Ital. Fesc. c. fig. ; Ilcckil, Siizgsher. Ah. 



Wiss. Witn, vii. \fio\, p. 555, taf. 24. fig. 1 ; Ileckeli^- Kner, AV/.s-.v- 



wasserjischc, p. 353. 

 nardoi, Meckel, I. c. p. 557, fig. 2 ; Ileckel ^- Kner, I. c. p; .•'.55. 



Snout osseous above, rather obtuse, of moderate length, its length 

 being more than one-third of the length of the head. Barbels not 

 flattened, simple, rather long, nearer to the extremity of thi' snout 



