. The skeleton of the black bass . en I make this statement I am aware of the fact that in my paper onAmia calva thirty-two was the number reckoned, but after carefully recounting theseon two perfect skeletons now before me, representing both species of the genus, 1 amsatisfied that there are but thirty of these bones. Fifteen of these vertebrae belongto the abdominal portion of the column, and each one supports a pair of ribs, all ofwhich in their turn, sav§ tYkel&st five pair, have epipleural appendages. The atlautalpair articulate with the vertebra at the very base of the neural arch, but a
. The skeleton of the black bass . en I make this statement I am aware of the fact that in my paper onAmia calva thirty-two was the number reckoned, but after carefully recounting theseon two perfect skeletons now before me, representing both species of the genus, 1 amsatisfied that there are but thirty of these bones. Fifteen of these vertebrae belongto the abdominal portion of the column, and each one supports a pair of ribs, all ofwhich in their turn, sav§ tYkel&st five pair, have epipleural appendages. The atlautalpair articulate with the vertebra at the very base of the neural arch, but as we pro-ceed backward they gradually recede from this position so as to finally spring frombeneath the transverse processes on the under side of the vertebra. This condition ischaracteristic of a great many of the osseous fishes. The neural and hsemal arches ofthis form are completely anchylosed with the vertebral elements, and in the best-developed segments, both superior and inferior, post- and pre-zygapophyses Fig. 7.—Sket<ih of the inner aspect of left half of shoulder girdle andpectoral limh of Jf. saZmoirf^s. Pfi(. 3., posttemporal; P5(o. T.,posterotemporal; S^^/^. c.,hypercoracoid; , hypocoracoid;, proscapularj T., teleotemporal; T., lower teleotemporal;Ast., actinosts; P/., pectoral fin. THE SKELETON OF THE BLACK BASS. 319 As the accompanying figure, shown in plate 44, of the skeleton of this bass isreproduced from a photograph of a carefully dissected and dried skeleton, it will beobseryed that a little ligamentous material is remaining, and some of the bony lin-rays and spines are very slightly uuparallel, but this faiit will lead no one astray, asIt is quite evident which bones have become so while the skeleton was drying. Thearrangement of these osseous Jin-rays and interspinous bones practically agrees withthose elements as we have long known them to exist iii all ordinary bony fishes, as inthe common yellow perch for example {Perca). T
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