Early Devonian fishes from Utah : Heteroostraci earlydevonianfis117deni Year: 1953 342 FIELDIANA: GEOLOGY, VOLUME 11 of comparable size. The structure of the posterior part of the bran- chial plate, the branchial opening, and the cornual plate (figs. 72, 77-79) has been described above (p. 322) and is similar to that of Fig. 79. Restoration of dorsal shield of Protaspis cf. bucheri, based on 20524 (X 1'2)- br, branchial opening; brp, branchial plate; cpp, posterior scale-like process of cornual plate; dd, dorsal disc; Idl, lateral dorsal sensory line; mdl, median dorsal sensory
Early Devonian fishes from Utah : Heteroostraci earlydevonianfis117deni Year: 1953 342 FIELDIANA: GEOLOGY, VOLUME 11 of comparable size. The structure of the posterior part of the bran- chial plate, the branchial opening, and the cornual plate (figs. 72, 77-79) has been described above (p. 322) and is similar to that of Fig. 79. Restoration of dorsal shield of Protaspis cf. bucheri, based on 20524 (X 1'2)- br, branchial opening; brp, branchial plate; cpp, posterior scale-like process of cornual plate; dd, dorsal disc; Idl, lateral dorsal sensory line; mdl, median dorsal sensory line; or, orbital plate; pbr, posterior process of branchial plate; pi, pineal plate; ro, rostral plate. P. dorfi. This region is not clearly displayed in any of the Bear- tooth Butte P. hucheri, but a specimen figured by Bryant (1933, pi. 1) appears to have a similar arrangement. Because of the dif- ferences in size and rostral proportions, the reference of this speci- men to P. hucheri must be considered as doubtful.
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