234 MEMOIRS OF THE CARNEGIE MUSEUM 
teeth on the basal two-thirds of its posterior margin, 
about 5 hooks in front. (Based on specimen from Pene- 
do 72 mm. long to base of caudal.) 
19. lateristriga (Miiller & Troschel). 
oo. Maxillary barbel extending to the adipose or middle of anal; 
pectoral spine terete, curved, 1-1.25 in the head; width of 
head 1.33 in its length; eye 4 in head, 1.5 in the snout, 
about equal to the interorbital; pectoral thorns much 
smaller than in P. lateristriga........ 20. vittata (Kroyer). 
000. Maxillary barbel extending to origin of anal; pectoral spine 
equals snout and eye; width of head equals snout and 
three-fourths of the eye; eye 3.25 in the head; snout a 
little longer than postorbital portion of the head; inter- 
orbital 5 in the length of the head; distance between 
snout and dorsal fulerum 3.4 in the length; dorsal spine 
nearer snout than anal; width of occipital process 3.5 in 
its length; pectoral spine with very feeble teeth on the 
basal half of its posterior margin, 12 hooks in front. 
(Based on specimen from Queimadas 72 mm. long to 
base of caudal.)........ 21. itapicuruensis Eigenmann. 
0000. Maxillary barbel reaching origin or end of base of anal; 
pectoral spine equals snout and eye or a little longer; 
eye 3.33-4, in middle of the head; interorbital 4.5; distance 
between snout and dorsal fulerum about 3 in the length; 
pectoral spine with twelve long recurved thorns along 
the middle of its posterior margin. 
22. macturki Eigenmann. 
00000. Maxillary barbel extending beyond origin of anal; pectoral 
spine equals snout and eye, with about 7 very strong 
hooks. See No. 32, chagresi (Steindachner). 
000000. Maxillary barbel extending beyond origin of anal; pectoral 
spine equals head less one-half of opercle; width of head 
1.4 in its length; eye 3.5-4 in the head; interorbital 4.4- 
5.33 in the head; center of eye in center of head; dorsal 
spine equidistant from snout and anal; width of occipital 
process 3 in its length; pectoral spine with feeble teeth 
not more than one-fifth or one-sixth the width of the 
spine. Caudal not split between the middle rays. (Based 
on the types 130-180 mm. long, from Rio Parahyba.) 
23. eigenmanni Boulenger. 
mmm. Maxillary barbel not extending to the anal. 
p. Maxillary barbel extending slightly beyond origin of ventrals; 
pectoral spine equals length of head less opercle; width of 
head a little greater than snout and eye; eye 4 in the head; 
snout equals postorbital part of head; interorbital 4.5 in 
the head; distance between snout and the process not 
