PLATE 57. A–F in Devonian Harpetidae from the central and eastern Anti-Atlas, Morocco

PLATE 57. A–F Fritchaspis montagnei (Hawle and Corda, 1847) type horizon and locality Acanthopyge Limestones (Eifelian), Koněprusy area, Czech Republic, five dorsal exoskeleton of partial cephala, Museum of Natural History, Prague, syntype Nos L 2996 (one of four syntypes) and L 2990. A–C, L 2996, a partial cephalon, A dorsal view, B anterior view and C lateral view. L 2990, D–F a plate with four partial cephala, D dorsal view, E lateral view of largest cephalon and F dorsal vie of brim perforations. G–J Declivoharpes praecedens by (Prantl and Přibyl 1954,) type horizon and locality Radotín Limestones (Lochkovian), praharadotín (Černá rokle gorge) dorsal exoskeleton of partial cephalon, Museum of Natural History, Prague holotype No. L19103. G dorsal view, H anterior view, I lateral view and J dorsal view of brim perforations. This specimen was illustrated by Prantl and Přibyl (1954, pl. 8 fig.2). Scale bars shown represent 1 cm unless otherwise indicated.