402 FISHES. ABDOMINALES. 



cond is adipose and without rays ; branchial membrane with 

 seven or eight rays; teeth small, scarcely perceptible, and 

 often wanting on the palate, tongue, and lower jaw. 



C. thymallus, Cuv. The Grayling. Body elongated, gray, with longi- 

 tudinal dusky blue lines crossing each row of scales ; central late- 

 ral row of scales with black points ; back rounded, greenish- 

 black ; belly white j first dorsal fin long and high, violet-colour- 

 ed, barred with brown ; pectoral fins white, ventral and caudal 

 ones reddish. 18 inches long. Inhabits mountainous Rivers in 

 Europe. B. Shaw, v. pi. 105. 



C. marcenula, Cuv. (S. albula, Bloch.) Body sub-elongated, silvery 

 white, with a tinge of blue on the back ; head somewhat taper ; 

 under jaw longer than the upper ; scales large ; fins pale-yellow ; 

 tail forked and bluish towards the tip. 6 inches long. Inhabits 

 European Lakes Block, pi. 28, fig. 3. 



C. lavaretus, Cuv. The Gwiniad. Head small and very taper in 

 front ; upper lip produced very considerably beyond the lower in 

 the form of a blackish soft snout ; mouth small, without teeth ; 

 scales broad ; back bluish-gray ; sides bluish ; belly silvery. 10 

 to 12 inches long. Inhabits Alpine Lakes of Europe. B. Penn. 

 Brit. Zool iii. pi. 73. 



C. rostratus. (S. rostratus, Shaw.) Broad Gwiniad. Body dusky 

 bluish, with longitudinal dusky lines on the sides ; scales round- 

 ed ; mouth large ; snout as in the preceding. Inhabits Rivers 

 of Germany and Sweden, &c. Block, pi. 26. 



Gen. 4. ARGENTINA, Lin. 



Mouth small, depressed horizontally ; tongue armed with hook- 

 ed teeth, and a transverse row of small ones on the vomer ; 

 six rays in the branchial membrane. 



A. sphyrcena, Lin. Inhabits the Mediterranean sea. Cuv. Mem. du 

 Mus.lyl. 11. 



The swimming-bladder of this species abounds in the silvery substance so remark- 

 able in fishes, and employed to form imitation pearls. Its stomach is singular from 

 its black colour. 



Gen. 5. CURIMATA, Cuv. Salmo, Lin. Characinus, Artedi. 



Mouth at the extremity of the snout, small ; head depressed ; 

 scales distinct ; first dorsal fin above the ventral fins ; the 

 second adipose and without rays ; teeth various ; four rays 

 in the branchial membrane. 



C. edetitula, Cuv. Toothless Salmon. Body silvery, with a slight 

 greenish tinge ; back olive-brown ; head yellowish, sinking in 

 above the eyes ; snout obtuse ; mouth small and toothless. 1 2 

 inches long. Inhabits Surinam. Bloch, pi. 380. 



C. unimaculata, Cuv. Body brownish above ; back and belly al- 

 most round ; belly silvery ; fins gray ; a black round spot on the 



