4. ANGCILLA. 25 



Angle of the mouth below the eye ; lips rather narrcjw. 



9. bostoniensis, p. 31. 

 Angle of the mouth below the eye ; lips well developed. 



10. texana, p. 32. 

 Angle of the mouth below the hind margin of the eye ; lips thick. 



11. latirostris, p. 32. 

 Angle of the mouth distinctly behind the eye. 12. mwklandii, p. 33. 



D. Teeth equally small, fanning hroadjiat hands. 



1. The vomerine band is scarcely or not broader than the max- 

 illary band. 



The length of the head is less than the distance between the commence- 

 ments of the dorsal and anal fins ; cleft of the mouth extending behind 

 the eye , 13. delalandii, p. 33. 



The length of the head is more than the distance between the commence- 

 ments of the dorsal and anal fins ; cleft of the mouth extending far 

 behind the eye 14. aneitensis, p. 34. 



Angle of the mouth below the hind margin of the eye. 



15. ajnbomensis, p. 34. 



2. The vomerine band is much broader than the maxillary band. 



16. inegastoma, p. 34. 

 fi. Eye not shorter than the snout 17. kieneri, p. 35. 



II. The dorsal Jin commences above or nearly above the vent. 



A. The dorsal Jin commences above or slightly in advance of the vent. 



1. Vomerine band of teeth of moderate width. 



a. Vom 3rine teeth extending about as far back as the maxillary. 

 Snout short, obtuse ; lips thin ; angle of the mouth below the hind mar- 

 gin of the eye, which is of moderate size or rather large. 



18. bicolor, p. 35. 

 Lips well developed ; angle of the mouth below the hind margin of the 



eye, which is of moderate size 19. vii'escens, p. 35. 



Lips thin ; angle of the mouth behind the small eye. 



20. sidat, p. 36. 



b. Vomerine band of teeth considerably shorter than the max- 



illary band 21. otistraiis, p. 36. 



2. Teeth forming exceedingly broad flat bands. 



22, amblodon, p. 37. 



B. Origin of the dorsal Jin behind the vent. 23. dussunneri, p. 37. 



I. The dorsal Jin commences considerably in advance of the vent. 



1. Angnilla mauritiana. 



Anguilla mauritiana, Bennett, Proc. Comm. Zool. Soc. 1831, p, 128. 



labrosa, Richards. Voy. Ereh. 4" Terr. Ichth. p. 113. 



Mursena maculata, Bleek. Ned. Tydschr. Diei-k. i. p. 237, or Atl. Ich- 



thyol. Mur<Bn. p. 9, tab. 1. fig. 2 (not H. B.). 

 ? manillensis, Bleek. Atl. Ichthx/ol. Muran. p. 10, pi. 44. f. 2 : 



or Ned. Tydschr. Dierk. 1864, p. 31. 

 Anguilla johannse, Giinth. in Fish. Zanz. p. 124. 

 Mursena marmorata, Kner, Novara, Fisch. p. 369. 



The length of the head is equal to the distance of the gill-opening 

 from the origin of the dorsal fin, somewhat less than one-half of its 

 distance from the vent, and less than the distance between the ccm- 

 racncemcnts of the dorsal and anal tins. Lips broad and ficshy. 



