XV. A LIST OF THE HYPOPHTHALMID.-E, THE DIP-LOMYSTID^, AND OF SOME UNRECORDED SPECIES OF SILURID^ IN THE COLLECTIONS OF THE CARNEGIE MUSEUMS By Homer G. Fisher. (Plate XLII.) The present paper gives a list of the unrecorded species of Hypoph-thalmidae, Diplomystidae, and Siluridae in the collections of the Carnegie Museum, exclusive of some species of the latter family. The omitted species of the Siluridae are recorded in other papers in this volume, and in the Memoirs, Vol. VII, No. 4. The studies here given were made while the author was a student in Indiana University. Family HYPOPHTHALMID^. I . Hypophthalmus edentatus Spix. 67700-?, C. M., nine, 1 17-175 mm., Para, Jan. 22, 1910. Haseman. 677ia-c, C. M., three, 215-270 mm., Manaos, Nov. 15-18, 1909. Haseman. 70270-5, C. M., two, the largest 305 mm., Manaos, Nov. 17 and 28, 1909. Haseman. Family DIPLOMYSTID.^. 2. Diplomystes papillosus (Cuvier & Valenciennes). 69900, C. M., one, 88 mm., San Juan, western Argentina, Feb. 25, 1909. Haseman. 69910-^', C. M., eleven, Rio Colorado, Argentina, March 5, 1909. Haseman. Family SILURID^ Subfamily Ariin^. 3. Genidens genidens (Cuvier & Valenciennes). 72940-5, C. M., two, 230-233 mm., Sao Joao da Barra, Parahyba, June 22, 1908. Haseman. ' Contribution from the Zoological Laboratory of Indiana University, No. 147. ANN. CARN. MUS., XI, 27, OCT. 3I, I917. 405
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