782 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



Depth 3%; head 2%. Snout 3 in head; eye 5%, 14^ in snout, 

 nearly II/2 in interorbital ; maxillary reaches % to eye, length 3l^ in 

 head; broad, thick fleshy upper lip strongly protractile and lower 

 jaw included, with continuous groove behind thick lower lip; stout 

 rostral barbels little longer than eye, still thicker maxillary barbels 

 third longer than eye; interorbital broad, concave. 



Scales 26 in lateral line (last 3 apparently on caudal base), 5 above, 

 3 below, 11 predorsal, 11 around caudal peduncle. Snout with small 

 dermal nodules and raised spots, 



D. IV, 8, fourth spine 2 in head, rather slender, hind edge weakly 

 serrate; A. iii, 5, first branched ray 2%; caudal 1%, deeply forked, 

 lobes pointed ; least depth of caudal peduncle 3 ; pectoral 2 ; ventral 



21/3. 



Nearly uniform brownish yellow, darker dorsally, with indications 

 of dark band from nape to dorsal fin. Snout and interorbital dark- 

 est. All fins pale, dorsal spine and rays slightly dusky. Length 

 134 mm. (Herre.) 



Mindanao, Philippines, in Lake Lanao. Only the type known. 



Genus OSPATULUS Herre 



Ospatulus Herre, Proc. Fan Pacific Sci. Congr., Australia, vol. 2, 1923, p. 1569, 

 1924. (Type, Ospatulus trmicatulus Herre, orthotypic. ) 



Body thick, robust, with rounded abdomen and isthmus and under- 

 side of head very broad. Head moderate. Snout rather long. Eye 

 small, anterior. Mouth rather large, subinferior, apparently not 

 capable of closing, truncate lower jaw seemingly with front end 

 cut off so reaching but halfway to upper jaw arch. Upper lip 

 strongly protractile. Thick lower lip laterally extended in wide 

 flap on each side, thus forms 2 pocketlike recesses on under side. 

 Postlabial groove parallel to lips and continuous around mouth 

 corners, but interrupted at chin. Rostral and maxillary barbels 

 present. Interorbital broad, profile of back to nuchal hump straight. 

 Gill membranes attached immediately behind hind eye end. Scales 

 rather large, with both longitudinal radiating and concentric striae. 

 Lateral line complete, little curved, tubes simple. Dorsal without 

 basal scaly sheath or only feebly developed, inserted before ventral, 

 longest spine slender and feebly denticulated. 



Lake Lanao, Mindanao. Known by its peculiarly modified mouth. 



ANALYSIS OF SPECIES 



a\ Dorsal spines 3 ; head 3% ; 12 scales on caudal peduncle truncatulus 



o'. Dorsal spines 4; head 2%o; 10 scales on caudal peduncle palaemophagus 



OSPATULUS TRUNCATULUS Herre 



Ospatulus truncatulus Herre, Proc. Pan Pacific Sci. Congr., Australia, vol. 2, 

 1923, p. 2569, 1924 [type locality: Lake Lanao, Mindanao (no description)] ; 



