16G On Three nexc Species of Sihiroid Fishes. 



pectoral, leacliiiig origin of anal. Anal I 5. Ui)per caudal 

 ray but little produced. Lateral scutes 27 or 28, with two 

 obtuse ridges, united on the seventeenth or eighteenth ; nuciial 

 shields without keels ; 17 scutes between dorsal and caudal, 

 15 between anal and caudal. Breast naked ; ventral shields 

 4 or 6 transversely enlarged ones on each side and 3 series of 

 small irregular ones in the middle. All the shields spinulose, 

 the spinules larger on the sides. Olive above, with 4 darker 

 transverse bands ; the bristles on the side of the head reddish 

 brown. 



Total length 360 niillim. 



Tavo specimens from thcMogy-guassu River, about 250 miles 

 inland of Santos. 



Loricaria jiduUna. 



Teeth small, well developed, 12 or 14 in each jaw. Head 

 much depressed, 1^ or 1^ as long as broad, 4 or 4;^ times in 

 total length ; snout pointed, projecting beyond the lip, 

 measuring half the length of the head ; head-shields rough 

 with small spines ; three very obtuse ridges on the snout ; 

 two feeble ridges on the occipital shield, diverging behind ; 

 diameter of eye 8 times in length of head, nearly twice in 

 interorbital width ; a strong postorbital notch ; lower labial 

 lobe large, strongly pa])illose, strongly fringed. Dorsal I 7 ; 

 first ray nearly | length of head, just above middle ventral 

 rays. Pectoral 1 6, not quite f length of head. Ventral I 5, 

 as long as pectoral, reaching origin of anal. Anal I 5. 

 Caudal truncate, upper ray not produced. Lateral scutes 28, 

 w^ith two obtuse ridges, united on the eighteenth or nineteenth ; 

 nuchal shields with two very feeble keels ; 17 scutes between 

 dorsal and caudal, 15 between anal and caudal. Breast 

 naked ; ventral shields, 5 to 8 transversely enlarged ones on 

 each side and 3 series of small irregular ones in the middle. 

 All the shields spinulose. Olive above, with 5 darker trans- 

 verse bands ; fins white, spotted with black, the spots having 

 a more or less marked tendency to form transverse bands ; the 

 edge of the dorsal and caudal white. 



Total length 210 millim. 



Two specimens from the Mogy-guassu River. 



I have hesitated before describing this fish as a new species, 

 as it might prove to be the female of the preceding. Since, 

 however, the differences are greater than such as are known 

 to be merely secondary sexual in other members of the genus, 

 the course 1 have provisionally followed appears to me the 

 safest from the point of view of scientific accuracy. 



