96 



SALMONIDJE. 



number of pyloric appendages (57) found in the large example is 



constant in this Trout. 



a. Female, 29 inches long. Lough Earne. Presented by the Earl 

 of Enniskillen. Caught in the beginning of November; ova 

 nearly mature, but still attached to the ovary ; Caec. pyl. 57. 



b-f. From 15 to 18 inches long : not in good state. Lough Earne. 

 Presented by the Earl of Enniskillen. 



22, Salmo nigripinnis. 



Specimen a, nat. size. 



D. 14. A. 12. P. 13. V. 9. L. lat. 120-125. L. transv. 30/28. 

 Ca;c. pyl. (36, Ireland -) 40-42. Vert. 57-58 (-59, Ireland). 



Largest specimen observed 16 inches ; female mature at a length 

 of 7 inches. 



Head well proportioned in its shape, and small when compared 

 with the body ; body less stout than in S. fario. The posterior point 

 of junction of operculum and suboperculum is nearer to the lower 

 anterior angle of the suboperculum than to the upper end of the 

 gill-opening. Praeoperculum generally with an indistinct lower 

 limb. Snout short, conical, not much produced in the male sex, in 

 which a mandibular hook has never been observed. Maxillary much 

 longer than the snout, but mi;ch narrower and more feeble than in 

 S. fario ; in specimens 8 inches long it does not extend to below the 

 hind margin of the orbit, aud at no age does it reach much beyond 

 it. Teeth moderately strong. The head of the vomer is triangular, 

 broader than long, with a transverse series of teeth across its base ; 

 the teeth of the body of the vomer form a single series, and only 

 now and then two teeth stand opposite to each other: these teeth 

 are persistent throughout life. Fins well developed, not rounded ; 

 the pectoral is pointed, and its length is nearly always more than 

 one-half of the distance of its base from that of the ventral. The 

 caudal fin has always the lobes pointed, is emarginate, and appears 

 truncate only when stretched to the utmost extent. In specimens 



II 



