Le) 
Lishes 
MEMOIRS 
CARNEGIE MUSEUM. 
Vou. VII. No. 4. 
PIMELODELLA AND TYPHLOBAGRUS.' 
By Cari H. HIGENMANN. 
(Puates XXIX-XXXYV.) 
Pimelodella and Typhlobagrus are two closely related genera of Siluride of 
the fresh waters of South America. Pimelodella is a widely distributed genus 
with many species. Typhlobagrus is an offshoot from Pimelodella. Eyes have 
disappeared in this genus and it is confined, so far as known, to the caves near 
Iporanga in southeastern Brazil. 
Pimelodella HKigenmann & Eigenmann. 
Pseudorhamdia STEINDACHNER (non Bleeker), Sb. Akad. Wiss Wien, LXXIV, 
1876, Siisswasserf. Siidéstl. Bras., III, p. 46 (lateristriga). 
Pimelodella EIGENMANN & EIGENMANN, Proc. Cal. Acad. Sci., (2), I, 1888, p. 131; 
Occasional Papers Cal. Acad. Sci., I, 1890, pp. 99 and 147. 
Type, Pimelodus cristatus Miller & Troschel. 
Nares remote; teeth villiform, in bands; gill-membranes free from the isthmus; 
dorsal short, with a feeble, pungent spine; anal short, with 11-15 rays; pectoral 
with a strong pungent spine variously armed with thorn-like teeth on its posterior 
(inner) edge; a long, adnate, adipose fin; caudal fin deeply forked, one or the other 
lobe frequently wider, or longer; well-developed maxillary barbels reaching to 
end of pectoral, or beyond the caudal; two pairs of mental barbels, sometimes in a 
nearly straight line; a frontal and a parietal fontanel, the latter reaching to the 
1 Contribution from the Zodlogical Laboratory of Indiana University, No. 154. 
229 
