416 MTrOILIDiK. 



e. L. lat. 28-30. 



a. Maxillary hidden 46. M. ceramensis. 



/3. Extremity of the maxillary visible . 49. M. compressua. 

 /. L. lat. 23-26. 



a. Maxillary hidden 47. M. oligolepis. 



/3. Extremity of the maxillary visible. 



• L. transv. 8 48. M. hj^selopterus. 



• L. transv. 10 60. M. melinopterus. 



C. Anal fin with ten soft rays. 



1. Maxillary hidden 51. M. decemradiatus. 



h. The extremity of the maxillary is visible. 



a. No pointed scale in the axil . . . 52. M. peronii. 



j3. A pointed scale in the axil ... 34. M. petherici. 



D. Anal fin with eleven soft rays ... 53. M. falcipinnis. 



III. The upper lip is very thick. 



A. Eye with an adipose membrane . . . 54. M. broussonetii. 



B. Anal fin with eleven soft rays .... 55. M. labeo. 



C. Anal fin with nine or ten soft rays ; eye without adipose membrane. 

 a. Cleft of the mouth broader than deep. 



a. Upper lip with a transverse fold. . 56. M. labiosus. 

 0. The upper lip alone is fringed or papillary. 



• Upper lip with three series of short, broad papillae ; the pec- 



toral extends to the thirteenth scale of the lateral line. 



57. M. chelo. 



• Upper lip with two series of short and broad papillae ; the pec- 



toral extends to the tenth scale of the lateral line. 



58. M. septentrionalia. 



• Upper lip with peven series of small, very distinct papillae. 



Body with black streaks ... 59. M. nigrostrigatus. 



• Upper lip vtdth obtuse, indistinct papillae. Body not black- 



striped 60. M. heterochilua. 



y. Both lips are fringed or papillary. 



• A. -2.. The maxillary is entirely hidden ; the height of the 



body is contained four times and a third in the total length. 



61. M. crenilabis. 



• A. -|-. The height of the body is contained five times and a 



fourth in the total length ; praeorbital not notched. 



62. M. macrochilus. 



• A. -?-. Extremity ofmaxillary not covered by the praeorbital, 



which has a distinct notch . . 63. M. riippellii. 



• A. ^ 64. M. cirrhostoma. 



6. Cleft of the mouth deeper than broad. 65. M. proboscideus. 



IV. Snout flat, roimded, with the upper part projecting beyond the 



mouth 66, M. corsula. 



