eigenmann: pimelodella and typhlobagrus 235 



quite reaching the dorsal plate; pectoral spine with about 9 

 feeble spines on its posterior margin, about 9 hooks in 

 front, the upper ones sharp, the lower obscure. (Based on 

 specimen from Rio Doce 72 mm. long to base of caudal.) 



24. harlti (Steindachner). 

 pp. Maxillary barbels extending to end of ventrals;' pectoral spine 

 equals length of head without opercles; width of head equals 

 snout and eye; eye 4 in the head; snout longer than post- 

 orbital portion of head; interorbital 5 in the length of the 

 head; distance between snout and dorsal fulcrum 3 in the 

 length; width of occipital process 3 in its length; pectoral 

 spine with 12 very strong graduate teeth on over half of its 

 posterior margin, about 5 hooks in front; adipose 3.4 in 

 the length. (Based on a specimen from Xiririca 91 mm. 



long to base of caudal.) 2.5. transitoria Ribeiro. 



ppp. Maxillary barbel extends to middle of ventrals (on one side 

 of the paratype to near anal); pectoral spine equals snout 

 and eye or shorter; width of head equals length of head 

 without opercles; eye 4.5-5 in the head; snout longer than 

 postorbital portion of head; interorbital 5 in the head; 

 distance between snout and dorsal fulcrum 2.8 in the length; 

 width of occipital process 3 in its length; pectoral spine 

 with 12 very feeble teeth on the basal half of the posterior 

 face; 9-11 recurved hooks near the tip in front; adipose 3.6-4 

 in the length (largely based on a specimen from Sapina 89 



mm. long, and on the types) 26. meeki Eigenmann. 



ee. Dorsal spine frequently prolonged into a filament extending consid.^rably beyond the rest of 

 the fin; interorbital 5 in the head; maxillary barbel reaching tip of ventrals or shorter; 

 pectoral spine with 9-11 teeth on the basal two-thirds of the posterior face; adipose 3.5- 



4.5 in the length 27. griffini Eigenmann. 



aa. Lower cheeks and mandible with conspicuous cavities; lower caudal lobe the longer; maxillary 

 barbel reaching to near origin or middle of caudal; pectoral spine with straight, feeble teeth on its 

 posterior surface; eye 3.5-4.5 in the head; adipose extending a very little beyond tip of anal. 



28. mucosa Eigenmann & Ward. 



1. Pimelodella serrata sp. nov. (Plate XXIX, fig. 1). 

 6967a C. M., type, 67 mm. 6966a C. M., paratype, 110 mm., San Joaquin, BoHvia, 



Sept. 5, 6, 1909. Haseman. 



Distinguished by its numerous pectoral thorns and the length of the barbels. 



Head 3.9-4.33; depth about 7. D. 1.6; A. 13; eye 4-4.2 in head, equal to or 

 slightly greater than interorbital; snout a little greater than postorbital; maxillary 

 barbels extending to the end of the base of the anal or beyond the base of the 

 caudal; postmen tal barbels to the tip of the pectoral. Adipose about 2.5 in the 

 length. 



3 To end of base of anal in No. 6979. 



