332 FISHES OF THE FAMILY LOEIOAEIID^. 



PLATE XII. 



Fig. 1. Ancistrus oligosjrilus : 1 a, head seen from above, p. 232. 



2. „ setosus : 2 a, head seen from above, p. 239. 



3. ,, guentheri: 3 a, head seen from above, p. 241. 



4. ,, platycephalus: 4 a, head seen from above, p. 235. 



