1 . SALMO. 07 



ee-jy/j. Male and female, 14 and 15 inches long. Brenz, tribntary 

 of the Upper Danube. From the Stuttgart Museum. Yert. 57. 



dd. Female, 8 inches long. Erms tributary of the Neekar. From 

 the Stuttgart Museum. Yert. 57. 



41^. Seven inches long. Frankstadt in Miihren. From Mr. Jeitteles's 

 Collection. Yevt. 58. 



u*. Female, 15 inches long. Lake of Constance. Presented by 

 Prof. V. Siebold. 



i;k. Adult female. Col de Tende (Maritime Alps). From Dr. Deakin's 

 Collection. Yert. 57 ; ceec. pyl. 47. 



XX-fjifjL. Young. San Martino, river Yar. From Dr. Deakin's Collec- 

 tion. 



Deformed examples. 



vv. Nine inches long. Bankeud River. Purchased of Mr, Wright. 

 il. Eight inches long. Caldbeck River. Purchased of Mr. Wright. 



In both these examples the caudal portion of the vertebral 



column is curved in the shape of an S. 



Description of a large male Thames-Trout caught in the 



month of May. inches. 



Total length 28^ 



Greatest depth of the body 6^ 



Length of the head 7-|^ 



Girth of biggest part of the body 16 



Least depth of the tail 2^ 



Distance between end of snout and eye 3 



Diameter of the eye ^ 



Length of the maxillary bone 3Jr 



Distance between eye and angle of praeoperculum . . 2| 



Greatest ■^•idth of operculum 1^ 



Greatest depth of operculum 2f 



Distance between occiput and origin of dorsal fin . . . 9 



Distance between end of dorsal and root of caudal . . 9i 



Length of base of dorsal 2-^ 



Greatest height of dorsal Sy'^ 



Length of pectoral 4 



* This specimen is one to which some interest is attached ; it has been sent to 

 lis by Prof. v. Siebold with the name of" Trutfa lacusfris, fem., with the sexnal 

 organs developed," and is said to be from the Lake of Constance. It is, in my 

 opinion, nothing but a Salmo fario, a species not mentioned by Eapp or Siebold 

 as an inhabitant of that lake ; it differs scarcely from other sjjecimens obtained 

 in Southern Germany ; and, to remove every doubt of its being S. Jario, and not 

 the lake-species as believed by Siebold, I may fvu'ther mention that it has 57 

 vertebra?, and not GO ; the number of its pyloric appendages is 43, a niunber 

 more frequently found in 8. fario than in the other lake-species. 



Thus it appears that S. fario inhabits the Lake of Constance ; probably it 

 has often been confounded with Salmo ra23pii {8. f ruff a. Rapp); and this may 

 account for a number of divergent statements as regards the number of pyloric 

 e.a'ca, their habits, etc. ; thus we suppose that the specimen, the pvloric appendages 

 of wliich have been examined by Kner (Sitzgsbcr. Akad. Wiss. Wien, IS.Vi, viii. 

 p. 208), belongs to tlais variety of S. fario rather than to 8. /an/sf,-is; likewise 

 tlie specimen the vomerine tcf'th of which have been figured bv Heckol (ibid. 

 p. 353. taf. 7. figs. 4, 5). 



