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. hartti (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 fulerum 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 Niririca 91 mm. 
long to base of caudal.)............25. 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 Higenmann. 
ee. Dorsal spine frequently prolonged into a filament extending considerably 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— 
db ial tials IVa oles eee po oUg elem oc.0e pomee aa oon oo ca O.CR DS 27. grifint 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 Kigenmann & Ward. 
1. Pimelodella serrata sp. nov. (Plate X XIX, fig. 1). 
6967a C. M., type, 67mm. 6966a C. M., paratype, 110 mm., San Joaquin, Bolivia, 
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 44.2 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; postmental barbels to the tip of the pectoral. Adipose about 2.5 in the 
length. 
3 To end of base of anal in No. 6979. 
