FISHES. 609 



riiis order consists (»f twenty-two genera, wliicli are divided into three 

 triboa : viz. 



TRIBE I. — SQUALIDES. 



1. Scylliiim ; 2. Cara,charias ; 3. Lainna; 4. Zygaena; 5. Galleus ; 6. Miis. 

 telin ; 7. Notidanus; 8. Selache ; 9. Cestracion ; 10. Spiiiax ; 11. Centriua ; 

 12. Scymnus; 13. Squ;itiua; 14 Pristis. 



TRIBE 11. — PLATY.SOMX. 



15. Rhinobatus; 16. Torpedo; 17. Raia; 18. Trygon; 19. Myliobatu.s j 20. 

 Ceplialoptera. 



TRIBE III. — CHIMiERiE. 



21. Cliiinoera ; 22. Calloryuchus. Of which we have figured, 



ScyUium catulus. — The Spotted Shark, or Dog-Fisli. Plato liiL fig. 3. 

 Described, vol. iii- p. 492. 



Carackarius vulgaris. — The White Shark. Plate liii. 4. Described, vol. 

 iii. p. 491. 



Lavina co7-nubiensis.— The Porbeagle Shark. Plate liii. fig. 5. Blue- 

 black above, silvery-white below ; tail semilunar, carinated ou each side ; 

 caudal lobes nearly equal ; teeth small, with two basal processes. Eight feet 

 long. Inhabits the European seas. 



Zygana vulgaris. — The Hammer- Headed Shark. Plate liii. tig. (i. 

 Body long, dark brown above, and white in the under parts ; upper dorsal 

 fin scythe-shaped, the second one small, and near the tail. Fifteen feet long. 

 Inhabits tlie Mediterranean. 



Selache )ua.iimus .—T^e Basking Shark. Plate liii. fig. 7. Described, 

 vol. iii. p. 491. 



Squatina Itevis.—The Angel Shark. Plate liii. fig. 1. Described, vol. 

 iii. p. 492. 



Pristis antiguorum.—TUe Saw-Fish. Plate liv. fig. 2. Horny beak, 

 provided with 21 large teeth on eaili side ; body dusky above, pale gray be- 

 low. Fifteen feet long. Inhabits the European seas. 



Torpedo vulgaris.— The Torpedo. Plate liv. fig. 3. Described, vol. iii. 

 p. 492. 



Cephaloptera diaOoli.i.— The Devil Ray. Plate liv. tig. 4. Black ; tail 

 very acute ; a dorsal fin at the commencement of the tail. Four feet broad. 

 IiUiabits the Indian seas. 



Chimcera monstroso. — The Northern Chimsera. Plate liv. fig. 5. Body 

 compressed, silvery-white , marbled with deep chestnut-brown ; head large, 

 with two incisory teeth in each jaw. Four feet long. Inhabits the North 

 seas. 



Callort/nclius Austrulis. — The Southern Calloryuchus. Plate liv. fig. 6. 

 Silvery ; the back pale reddjsh fawn-colour, and the tins of the sumo colour 

 I' our feet long. Inhabits the South seas. 



ORDEll III.— STURIONES. 



BranchlrB free, their openings greatly (left, with an operculum; hvl lUa 

 membrane devoid of rays. 



IV. 3 F 



