414 MUOILIT).E. 



B. Anal fin with nine soft rays. 



a. L. lat. 20-28. 



a. The height of the body is one-fifth of the total length. 



11. M. nepalensis. 



/3. Tlie height of the body is one-fourth of the total length. 



12. M. argenteus. 



b. L. lat. 30-32. The height of the body is more than one-fifth of 



the total length ; extremity of the maxillary visible ; the origin 

 of the second dorsal fin is above the middle of the anal. 



13. M. simdanensis. 



c. L. lat. 33-35. 



a. The extremity of the maxillary is visible. 



* The upper profile is cm'ved ; tlie pectoral fin is longer than 



the head, the lengih of the snout not included, and extends 

 to, or beyond, the origin of the dorsal fin. 



14. M. strongylocephalus. 



♦ The upper profile is curved ; the height of the body is more 



than one-fifth of the total length ; the pectoral does not ex- 

 tend to the dorsal 15. M. parsia. 



• The upper profile is cun'ed ; the height of the body is rather 



less than one-fifth of the total length ; the pectoral is shorter 

 than the head, the length of the snout not included. 



16. M. belanak. 



* The upper profile is straight ; the interorbital space entirely 



fiat 17. M. planiceps. 



0. The maxillary is entirely hidden. 



• Pectoral as long as the entire head. 18. M. longimanus. 



* Pectoral somewhat shorter than the head and extending to the 



dorsal ; snout as long as the eye. 19. M. kelaartii. 



* Pectoral as long as the head, the extent of the snout not in- 



cluded ; snout shorter than the eye ; the height of the body 

 is one-fifth, or less than one-fifth, of the total length. 



20. M. engeli. 



* Pectoral as long as the head, the length of the snout not in- 



cluded ; the height of the body is more than one-fifth of the 



total length 21. M. cantoris. 



il. L. lat. 36-38. 



a. The maxillary is entirely hidden, or only a narrow lateral sti-ipe 

 of it is visible. 



• The mandibulary angle is a right one. 



22. M. brasiliensis. 



• The mandibulary angle is obtuse . 23. M. robustus. 

 /3. The extremity of the maxillary is visible. 



* Pectoral much shorter than the head. 



24. M. affinis. 



• Pectoral nearly as long as the head. 



25. M. ophuysenii. 

 e. L. lat. 40-43. 



a. Dorsal and anal fins not scaly . . 20. M. cunuesius. 

 j3. Dorsal and anal fins scaly. ... 27. M. speigleri. 



