468 Mr. C. T. Regan on the Fishes of 



2 to 2^, length of snout 3 to 3f . Jaws equal anteriorly ; prse- 

 maxillary band of teetli with a pointed process at each end; 

 maxillary barbel extending to operculum or basal part of pec- 

 toral. Occipital process separated by an interspace from basal 

 bone of dorsal spine. Dorsal I 6 ; spine smooth, \ to § length 

 of'head. AnallO. Pectoral spine ^ to | length of head, serrated 

 on both edges, the posterior teeth usually the stronger, in 

 length not much less than the width of the spine ; clavicular 

 process short, its upper edge about equal to diameter of eye. 

 Pelvics not reaching anal. Caudal rounded in adult, in young 

 upper lobe produced and pointed. Adults uniformly dark 

 greyish ; young with a pale transverse bar from base of one 

 pectoral fin to the other, a series of 4 pale spots along the 

 back, respectively in front of and behind dorsal tin, on and 

 behind adipose fin, and 3 larger pale spots along each side. 

 Caudal with small dark spots, blackish at base and often 

 crossed by a dark bar posteriorly ; other fins either entirely 

 blackish, or with a pale margin, or pale with a blackish bar. 



Nine specimens, 60 to 250 mm. in total length, from the 

 Condoto (Spurrell), the San Juan and the Tamana (Palmer), 

 and the Durango, W. Ecuador {Rosenberg) . 



Related to P. villosus, Eigenm., from British Guiana. 



Pygidiidae. 

 26. Pygidium unicolor, sp. n. 



Depth of body 7 in length, length of head 6. Head as 

 broad as long. Diameter of eye 12 in length of head or 3 in 

 interocular width ; eyes well in advance of middle of head, 

 close behind nostrils. Barbels as long as head. Doz-sal 8-9, 

 with 5 or 6 branched rays, rounded ; origin above or a little 

 in advance of vent, 1| as far from end of snout as from base 

 of caudal. Anal 7, with 4 branched rays; origin below last 

 rays of dorsal. Pectoral filament -£ to as long as head, 

 branched rays § length of head. Pelvics covering vent. 

 Caudal subtruncate. Coloration uniform. 



Two specimens, 80 and 85 mm. in total length, from the 

 Condoto (Spurrell). 



27. Pygidium spilosoma, sp. n. 



Depth of body 7 to 8 in length, length of head 6 to 6|. 

 Head longer than broad. Diameter of eye 10 to 12 in 

 length of head, 2^ to 3 in interocular width ; eyes very 

 slightly in advance of middle of length of head, their distance 

 from posterior nostrils g or y of length of head. Maxillary 



