PLATE 18. A–F Fritchaspis edgecombei n in Devonian Harpetidae from the central and eastern Anti-Atlas, Morocco

PLATE 18. A–F Fritchaspis edgecombei n. sp., dorsal exoskeleton of cephalon only, NHMUK It 29224, from "Cherurid Couche", Er Remlia Formation, lower Emsian, Jbel Issoumour (Fig. 2B, Map 7, site 19). A, dorsal, B, antero-dorsal, C, anterior and D, lateral view. E, dorsal view of brim perforation and F, lateral view of eye lobe. G–N Maghroharpes hammii n. sp., dorsal exoskeleton, thorax enrolled, holotype, NHMUK It 29292, from an horizon below the "Dicranurus Couche", Ihandar Formation, Pragian, Jbel Oufatene (Fig. 2B, map 8, site 21). G, dorsal, H, anterior, J, lateral and I, posterior view. L, dorsal view of brim perforation, N, lateral view of glabella and muscle insertion scars and M, dorsal view of cuticle on glabella, genal area, ala, occipital ring and posterior border. Scale bars shown represent 1 cm unless otherwise indicated.