232 



]\Ir. C. T. Regan — A Prehmmarr/ 



the length of head. 9 to 12 branchiostegals. 12 to 15 gill- 

 rakers on the lower part of anterior arch, the longest i to |^ 

 the diameter of eye. 128 to 162 scales in a longitudinal 

 series. Dorsal 12-15, with 8 to 10 branched rays, its origin 

 nearer to the tip of snout than the base of caudal, the longest 

 ray from | to as long as the head. Anal 11-14, with 7 to 9 

 branched rays. Pectoral § to 1^ the length of head, ex- 

 tending I to j^Q- of the distance from its base to the base of 

 pelvics. Least depth of caudal peduncle 1-^- to 1| in its 

 length and ^ or nearly ^ the length of head. 5y or 60 

 vertebrae. Bluish black above, silvery below, sometimes 

 shaded with orange ; back and sides sometimes with small 

 pale spots ; fins dusky. 



f/ab. Lough Melvin in Fermanagh. 



Here described from twenty-six examples, 210 to 260 mm. 

 in total length. 



Of the sixteen specimens in the British Museum only one 

 is a female ; this has the pectoral fin longer than the head. 



5. Salvelinits Jimhriatus, sp. n. 



Depth of body 4§ in the length, length of head 4|. 

 Snout subconical, with upper profile decurved anteriorly, as 

 long as eye, the diameter of which is 4^ in the length of 

 bead. Literorbital region flat, its width 3f in the length of 

 head. Dentition moderate ; jaws equal anteriorly ; maxillary 



Fig. 5. 



Salvelinus Jivibriatus. Head from above and from the side. 



extending to below the posterior margin of pupil, its length 

 2| in the length of head ; lower jaw pointed anteriorly, its 

 length nearly 1;| in the length of head. 10 branchiostegals. 

 18 or 19 gill-rakers on the lower part of anterior arch, the 



