Smithsonian miscellaneous collections . ed the electric power of the fish. A preliminary note has been publishedin Science (March 23, 1906, p. 469, 470) and details may be expected later. 412 SMITHSONIAN MISCELLANEOUS COLLECTIONS [vol. 48 In specimens of both guttatus and y-grcccum two and one-fourth tothree inches long, the skin is scaleless, and the head above has anosseous casque extending close up to the nostrils and between theeyes. This was supposed to be characteristic of Astroscopus andthat genus was originally based on such characters. As the fishesincrease in size the slight naked sp
Smithsonian miscellaneous collections . ed the electric power of the fish. A preliminary note has been publishedin Science (March 23, 1906, p. 469, 470) and details may be expected later. 412 SMITHSONIAN MISCELLANEOUS COLLECTIONS [vol. 48 In specimens of both guttatus and y-grcccum two and one-fourth tothree inches long, the skin is scaleless, and the head above has anosseous casque extending close up to the nostrils and between theeyes. This was supposed to be characteristic of Astroscopus andthat genus was originally based on such characters. As the fishesincrease in size the slight naked space behind the nostrils becomesenlarged and the enlargement continues until the large naked areascharacteristic of the adult Upsilonophonis are developed. Theidentity of the two genera was recognized by Gill as early as 1872,but the differences seemed to be so great that some elapsed beforethe identification was entirely accepted. Ill A third well-marked genus (Kathetostoma) is represented by acouple of species in warm American
Size: 2766px × 903px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience
