234 



site to 20th lateral scale and nearly totally 



behind anal. Least height of caudal 



peduncle less than its length and less 



than twice length of head. i8 — 21 prae- 



dorsal scales M. honiccnsis p. 249. 



4. L.l. 36 — 40. Maxillary hidden. First dorsal 

 spine about in the middle between base 

 of caudal and end of snout. Height of 

 caudal peduncle more or less than twice 

 in length of head. 



a. L.l. 36 — -38. Rostro-dorsal profile convex. 



Pectorals longer than head M. cacrulcomaculatus p. 250 



b. L.l. 38 — 40. Pectorals shorter than head. 

 ct, Kostro-dorsal profile convex. Upperlip 



smooth. Pectorals reaching to origin 

 of first dorsal. Origin of second dorsal 

 and anal opposite. Anal not or only 

 slightly before second dorsal. Pectorals 

 shorter than head. Least height of 

 caudal peduncle i''/4 to somewhat 



more than twice in head M. se/icli p. 252. 



/3. Rostro-dorsal profile nearly horizontal, 

 snout depressed. Upperlip ciliated. 

 Pectorals reaching to gth or 10th 

 lateral scale. Origin of anal before 



that of second dorsal M. ccplialtis p. 253. 



III. Upper lip very thick. Gelatinous eyelid wanting. 

 Anal with 9 soft rays. 



a, L.l. 39 — 42. Maxillary hidden or nearly so. 

 Origin of second dorsal opposite to 24th or 

 25th lateral scale; slightly behind that of anal. 



1. Lower part of upperlip with about 4 series 

 of papillae. Lower lip laterally papillate. 



Pectorals shorter than head J/, crenilabis p. 256. 



2. Inferior border of upperlip with a single 

 series of very conspicuous obtuse papillae, 

 more or less fimbriate or denticulate. Lower 

 lip with similar papillae. Pectorals as long 



as head M. viacrochilns ') p. 257. 



3. Upperlip with or without one indistinct series 

 of obtuse papillae. Lower lip without papillae. 



Pectorals as long as or longer than head. M. heterochiltis p. 258. 

 The position of second dorsal is not known, as it is not described by Bleeker. 



