6. OSMERTTS. 167 



Salmo (Osmems) spirinchiis, Pall. Zaof/r. lioss.-As. iii. p. 387. 

 Eperlanus vulgaris, Gaimard, Voy. Isl. Sf Grcenl. Poiss. pi. 18. fig. 2 

 Osmems spii-inclius, Cm: 4'- ' '«/. xxi. p. 387. 



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

 L. transv. 7/11. dec. 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 ; youug 

 examples have the eje comj^aratively larger. Vomerine teeth and 

 anterior lingual teeth large, fang-like ; 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 silveiy. 



Coasts and numerous freshwaters of northern and central Eu- 

 rope. 



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



b. Adult : skin. Scotland. From Mr. ParneU's Collection. 

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

 e. Adult. Fifeshire. Museum Leach. 



f-h. 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. 



lu-x. Adult. Gefle. From Mr. Wheelwright's Collection. 



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



/3-f". Young. Bohuslan. Presented by Hr. A. W. Malm. 



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

 of Bjewsersk (jS^orth llussia). Cajc. pyl. 5 ; Vert. 60. 



ij. 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, .Vifch. Lit. ^' Phil Trans. Knv York, i. p. 435. 

 Osmems viridescens, Lcsueur, Jmirn. Acad. Xat. Sci. Phi/ad. i. p. 230 ; 



Del-a;/, Xeiv York Fauna, Fishes, p. 243, pi. 39. fig. 124 (bad); Cuv. 



cy Val. xxi. p. 388. 

 Osmems, sp., Thad. Norris, in Proc. Acad. Nut. Sci. Phil. 1861, p. 58. 



Scarcely distinct from 0. operlanus, but with a little smaller scales, 



* The pyloric appendages are so short that some of them frequently become 

 quite inconspicuous. 



