116 Mr. C. T. Regan o/i //<e 



on the lower part of anterior arch. 164 to 186 scales in a 

 longitudinal series. Dorsal with 8 or 9 branched rays, its 

 origin nearer to the tip of snout than tlie base of caudal, the 

 longest ray about § the length of head. Anal with 7 or 8 

 branched rays. Pectoral | to ^ the length of head, extending 

 ^ to I of the distance from its bise to the base of pelvics. 

 Least depth of caudal peduncle 1^ to 2^ in its length and \ 

 tiie length of head. Back and sides, with dorsal and caudal 

 fins, bluish grey ; belly silvery or orange; orange spots on 

 the sides. 



Uab. Loch of Girlsta, Tingwall, Shetlands. 



Four male specimens, 150 to 200 mm. in total length, 

 three of them recently presented by Mr. J. S. Tuiloch, who 

 tells me that Girlsta is the only char loch in the Slietlands. 



2. Salvelinus t'nframundus, sp. n. 



Depth of body 4^ to 4§ in the length, length of head 4^ to 

 4^. Snout obtuse, with upper profile decurved throughout, 

 a little longer than eye, the diameter of which is 5;^ to 5^ in 

 the length ot head. Interorbital region convex, its width 3.\ to 

 3^ in the length of head. Dentition feeble ; lower jaw shorter 

 than and included within the upper ; maxillary extending 

 nearly to below the posterior margin of eye, its length 2| in 

 the length of head ; lower jaw rounded anteriorly, its length 

 If to 1^ in the length of head. 10 or 11 branchiostegals. 

 13 or 14 rather short gill-rakcrs on the lower part of anterior 

 arch. 178 to 195 scales in a longitudinal series. Dorsal 

 with 9 branched rays, its origin nearer to the tip of snout 

 than the base of caudal, the longest ray § the length of head. 

 Anal with 8 or 9 branched rays. Pectoral a little more than 

 § the length of head, extending ^ of the distance from its 

 base to the base of pelvics. Least depth of caudal peduncle 

 2 in its length and ^ to | the length of head. 59 vertebrae. 

 Colour in spirits : brownish on back and sides, paler below ; 

 some small pale spots on the sides; dorsal and caudal fins 

 dusky. 



This description is based on two male specimens, 185 and 

 195 mm. in total length, from Hellyal Lake, Hoy Island, 

 Orkneys, presented by Dr. Trail in 1862. 



During the last few years Mr. William Cowan has made 

 attempts to get more examples of this interesting form, but 

 Avithout success. I have it on his authority that char are not 

 found in any other lakes in the Orkneys. Mr. T. Middlemore, 

 who owns the lake, has also made unsuccessful efforts to 

 catch some char; none have been captured since h-^ has been 

 the proprietor, and he believes they are extinct. 



