82 SALMONIJ)^. 



h. Skin, 10 inches long. Lago Maggiore. Presented by T. C. 

 Eyton, Esq. 

 Agassiz and Sicbold confound this species with the Sahno lacustris 

 from tlie Lake of Constance, which has a different number of vertebrte 

 and pyloric appendages. /S. lemanus is more nearly allied to 8. fario 

 and aS. riqypii than to S. lacustris. The figures given by Agassiz 

 and by Valenciennes convey a very good idea of the characters of 

 this fish. 



11. Salmo rappii. 



Grund-ForeUe of the Lake of Constance. 

 Sefahrin, etc., Mmigolt, Fischbuch, p. 15. 

 Salmo illanca, Wartmann, Schrift. Berl. Gesellsch. ntrf. Frttmd. iv. 



178.3, p. 55 ; cop. by Block, iii. p. 180 {S. lacustris). 

 trutta, Schrank, Ntrhist. Briefe, i. p. 312, and Faun, boica, i. 



p. 319 ; Hmimann, Bcschreib. Bodensee s, pp. 146, 147. 



lacustris, Ilarfuxniii, Jlc/vet. Ichthyol. p. 101. 



Salmo trutta, Ai/ass. Pois.<;. d'eau douce, pi. 6, 7, 7^. 



Fario ti'utta, Ra^)}), Fische des Bodettsee's, p. 29, taf. 4 (fig. optima). 



Trutta lacustris, part., Siebold, S'dssivasserfische, p. 301. 



B. 11. D.13. A. 12. P. 13. V.IO. L.lat.l20. L. transv. 27/35. 

 Ca3c. pyl. 48-54. Vert. 59-60. 



Attaining to a length of 36 inches. 



Head somewhat depressed, proportionate in size, nearly two-ninths 

 of the total length (without caudal) ; body stout, Prseopercidum 

 crescent-shaped, with a very distinct lower limb ; posterior opercular 

 margin obtusely rounded, the opercidum being short. Snout pro- 

 duced in very large males only, generally rather obtuse ; male with 

 a sliort mandibidary hook. MaxiUary strong, dilated in its hinder 

 portion, extending beyond the orbit in adult examples. Teeth stro)ig ; 

 vomerine teeth in a single series, but fi'equently irregularly placed, 

 persistent throughout life. Fins well developed ; caudal truncate in 

 mature examples. There are about sixteen scales in a transverse 

 series descending from behind the adipose fin forwards to the lateral 

 line. 



Sides with a reddish hue, and with numerous X-shaped brownish 

 spots. Opercles with roundish spots. 



Lake of Constance. 



a. Male, 24 inches long. Presented by Professor W. von Eapp. 

 Obtained in the month of December, after spawning ; mandi- 

 bulary hook slightly developed. Cicc. pyl. 54, 



h. Female, 17 inches long. Presented by Prof. W, von Eapp, Ob- 

 tained at the same time ; ovaries not developed, ova minute. 

 Caec. pyl. 54. 



c. Male, 32 inches long : skeleton. Presented by Prof. W. von Eapp. 



Obtained with the former specimens ; mandibulary hook well 

 developed. 



d. Intestines of specimen c. Caec. pyl. 54. 





