3G4 CARCHARIIDiE. 



two-tifths of that of the upper ; the second dorsal shorter than the 



anal 16. porosus, p. 365. 



one-loiirth of that of the upper. Gill-openings much wider than orbit. 



17. obscunis, p. 366. 

 two-sevenths of that of the upper. Gill-openings as wide as ojbit. 



18. sorrah, p. 367. 

 two-fifths of that of the upper ; the second dorsal not much smaller than 



anal 19. dussumieri, p. 367. 



/3/3. Snout very short and obtuse. 

 Coloration uniform ; upper teeth with the notch very indistinct. 



20. gangeticus, p. 367. 

 Coloration uniform ; upper teeth distinctly notched. 



21. amblyrhlnchtis, p. 368. 

 Body with uarK transverse spots 22. fasciatus, p. 368. 



bb. Origin of the first dorsal conspicuously distant from the root 

 of the pectorals. 



Fins without ornamental colours 23. brachyurus, p. 369. 



All the fins with black extremities 24. melanopterus, p. 369. 



Pectoral and caudal with black extremities, but no black on the first 



dorsal 25. bleekeri, p. 370. 



Margins of the fins of a pure white 26. albomarginatus, p. 370. 



/3. The lower teeth without serrature. 



The second dorsal entirely bpposite to the anal. 



27. menisorrah, p. 371. 

 The anal fin in advance of the second dorsal. 28. bornccnsis, p. 371. 



b. The upper teeth not conspicuously oblique, serrated, broad, regulai'ly 



triangular. 

 «. The lower teeth like the upper .... 29. amboinensis, p. 372. 

 /3. The lower teeth narrow, on a broad, two-rooted base, serrated. 

 The second dorsal smaller than the anal. ... 30. lamia, p. 372. 

 The second dorsal rather larger than the anal. 



81. glyphis, p. 373. 



c. The upper ceeth erect, rather narrow, on a two-rooted base, serrated; 



the lower of a similar form. 

 The extremities of most of the fins black . . 32. limbatus, p. 373. 

 Fins without black 33. jjleurotcenia, p. 374. 



d. The upper and lower teeth slender, numerous. 



Teeth ^5 34. temminckii, p. 374. 



Teeth JJ^ 35. oxyrhynchus, p. 375. 



14. Carcharias glaucus. 

 Blue Shark. 

 Galeus glaucus. Rondel, p. 378 ; Gesner, De Aquat. p. 009 ; Aldrov. 



p. 394 ; Willvghby, p. 49. 

 Squalus, sp., Artedi, Synon. p. 98. no. 13, and Gen. p. 69. no. 13. 

 Squalus glaucus, L. Syst. Xat, i. p. 401 ; JBl. taf. 86 ; Lac^p. i. p. 213; 



m. Schn. p. 131 ; Kisso, Ichth. Nice, p. 26; Tttrt. Brit. Faun. p. 113 ; 



Jenyns, Man. p. 499 ; lionap. Faun. Ital. Peso. 

 Blue Shark, Watson, Phil. Trans. Ixviii. pt. 2. p. 789, pi. 12 ; Penn. 



Brit. Zool. iii. p. 95, or, ed. 1812, iii. p. 143; ^Couch, Fish. Brit. 



Jsl. i. p. 28, pi. 15. 



