84 SALMONID.'K. 



rays are nearly half as long as the outer ones. There are fifteen 

 scales ill a transverse series descending from behind the adipose fin 

 forwards to the lateral line. 



Bright silvery, greenish on the back ; more or less numerous X- 

 sliaped black spots on the sides ; smallish round spots on the gill- 

 covers and the dorsal fin ; the other fins blackish towards the ex- 

 tremity. 



Lake of Constance and lakes of Upper Austria. 



a. Fine female specimen, 18 inches long. Lake of Constance. From 

 the Stuttgart Museum. Ovaries and ova fully developed*. 



h-c. Fine sterile specimens, 23 to 18 inches long. Lake of Constance. 

 Presented by Prof. W. vou Rapp. 



d. Fine sterile specimen, 19 inches long. Lake of Constance. From 



the Stuttgart Museum. 



e. Sterile female specimen, 14 inches long. Lake of Constance. 



Presented by Prof. v. Siebold. 

 /. Skeleton. Lake of Constance. From Dr. A. Giinther's Collection. 



13. Salmo marsilii. 



Lax, Marsil. Danub. Pannon.-Mys. iv. p. 10, tab. 22. 

 Lachs-Forelle, Heckel, in Sitzgsher. Acad. Wiss. Wien, 1852, viii. p. 348. 

 Fario marsiglii, Heckel, I. c. taf. 7. figs. 6-8 ; Knet; ibid. 1851, vi. 



p. 244, and 1852, viii. p. 215; Heckel <^ Kjier, S'dsswasserfische, 



p. 267, fig. 149 (not good). 

 Trutta lacustris, part., Siebold, SUsswasserfische, p. 301. 



B. 10-11. D. 13. A. 11. L. lat. 120. CiEc. pyl. 90-100. 



Attaining to a length of 36 inches and more. Head of proportionate 

 size ; body stout. Prseoperculum crescent-shaped, with a very indi- 

 stinct lower limb ; posterior opercular margin rather angular ; the 

 posterior point of junction of operculum and suboperculum is midway 

 between the lower anterior angle of the suboperculum and the upper 

 end of the gill-opening. Snout moderately produced ; maxillary 

 rather narrow, moderately dilated behind, extending to behind the 

 orbit in adult examples. Teeth strong ; vomerine teeth in a single 

 series, alternately bent towards the right and left, and frequently 

 somewhat irregularly placed. Fins well developed ; caudal sub- 

 truncate or shghtly emarginate in adult examples. 



Sides with numerous brownish spots, roundish on the opercles and 

 on the trunk, more X-shaped towards the taU. 



Mountain-lakes of Upper Austria. 



* Prof. v. Eapp informs me, that he also has found the abdominal cavity full 

 of ova as large as hemp-seed, in a specimen weighing four pounds and obtained 

 in December. 



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