6. OSMERTJS. 107 



Salmo (Osmerus) spirinchus, Pall. Zoogr. Moss.- As. iii. p. 387. 

 Eperlanus vulgaris, Gaimard, Voy. Isl. 8f Gi'oenl, Poiss. pi. 18. fig. 2. 

 Osmerus spirinchus, Cuv. 8f Val, xxi. p. 387. 



B. 8. D. 11. A. 13-16. P. 11. V. 8. L. lat. 60-62. 

 L. transv. 7/11. C^ec. pyl. 2-6*. Vert. 60-62. 

 The height of the body is much less than the length of the head, 



which is one-fourth or two-ninths of the total (without caudal). 



Snout produced, much longer than the diameter of the eye ; young 



examples have the eye comparatively larger. Vomerine teeth and 



anterior lingual teeth large, fang-Uke ; posterior mandibulary teeth 



larger than the anterior ones, which form a double series, the 



inner series containing stronger teeth than the outer one. The 



maxillary extends to, or nearly to, the vertical from the hind margin 



of the orbit. Back transparent greenish, sides silvery. 



Coasts and numerous freshwaters of northern aad central Eu- 

 rope. 



a. Adult. Scotland. Presented by Dr. Johnston. 



h. Adult : skin. Scotland. From Mr. Parnell's Collection. 



c-d. Young. Firth of Forth. From Mr. ParneU's Collection. 



e. Adult. Fifeshire. Museum Leach. 



/-A. Fine specimens, from 8 to 10 inches long. Conway. Presented 

 by T. C. Eyton, Esq. 



i, Jc-l. Adult. British. 



m-r. Adult and young. Lake Wenern. 



s-u. From 8 to 12 inches long. Lake Wenern. From Mr. Wheel- 

 wright's Collection. — These specimens from Lake Wenern are 

 very lean in general appearance, and have the eye comparatively 

 a little larger. Vert. 60. 



V. Adult. Coasts of Gestrickland, Sweden. From Mr. Wheel- 

 wright's Collection. 



w~x. Adult. Gefle. From Mr. Wheelwright's Collection. 



y-a. Adult : bad state. Gulf of Finland. 



fi-c. Young. Bohuslan. Presented by Hr. A. W. Malm. 



e. Several specimens, 3 inches long, sexually fuUy developed. Lake 

 of Bjewsersk (North Russia). Caec. pyl. 5 ; Vert. 60. 



T). Half-grown. Haarlem. Purchased of M. Parzudaki. 



^. Adult female: skeleton. Gestrickland. From Mr. Wheel- 

 wright's Collection. 



V. Adult: skeleton. Berlin. From Dr. A. Giinther's Collection. 

 Vert. 62. 



2. Osmerus viridescens. 



Salmo eperlanus, Mitch. Lit. i^ Phil. Trans. New York, i. p. 435. 

 Osmerus viridescens, Lesueur, Journ. Acad. Nat. Sci. Philad. i. p. 230 ; 



Dekay, Neiv York Fauna, Fishes, p. 243, pi. 39. fig. 124 (bad); Cuv. 



8f Val. xxi. p. 388. 

 Osmerus, sp., Thad. Norris, in Proc. Acad. Nat. Sci. Phil. 1861, p. 58. 



Scarcely distinct from 0. f^erlanus, but with a Little smaller scales, 



* Tho pyloric appendages are so short ihat some of tliem frequently become 

 quite inconspicuous. 



