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 (MuUer & Troschel). 



00. 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 fulcrum 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 fulcrum about 3 in the length; 

 pectoral spine with twelve long recurved thorns along 

 the middle of its posterior margin. 



22. madurki 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. Ma.xillary 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 



