Figure 1.

Carcharhinus obscurus, LJVC-0275, about 1400 mm: cranium in dorsal (left) and ventral (right) views. Del. L.J.V.C. Abbreviations: AF, anterior fontanelle; BP, basal plate; CF, foramen for internal carotid artery; ECN, ectethmoid condyle; EF, ectethmoid foramen; ES, ectethmoid shelf; FF, frontal fenestra; FG, foramen for glossopharyngeal nerve; FM, foramen magnum; FV, foramen for vagus nerve; HF, hyomandibular facet; LR, lateral rostral cartilage; MK, median keel in subethmoid fossa; MR, medial rostral cartilage; NA, nasal aperture; NC, nasal capsule; NP, notch for orbital process of palatoquadrate; O, orbit; OC, occipital condyle; OCN, occipital centrum; OF, foramen for orbitonasal vein; OR, opisthotic ridge; OT, otic capsule; PF, foramen for ophthalmicus profundus nerve; PR, preorbital process; PRF, parietal fossa; PT, postorbital process; RF, rostral fenestra; SEF, subethmoid fossa; SFE, fenestra for stapedial (orbital) artery; SR, sphenopterotic ridge; SS, suborbital shelf.

Figure 2.

Nasolamia velox, LJVC-0268, 526 mm, newborn or later embryo female: cranium in dorsal (left) and ventral (right) views. Del. L.J.V.C. Abbreviations as in Fig. 1.

Figure 3.

Nasolamia velox cranium, LJVC-G-214, 112 mm nasobasal length: A, dorsal view; B, ventral view; C., lateral view. Photograph by L.J.V.C.

Figure 4.

Nasolamia velox, UCLA 60-51, 915 mm, immature male: A, left side; B, underside of head; C, enlarged left nostril. Del. J.A.F.G.

Figure 5.

Nasolamia velox, UCLA W52-247, about 1370 mm: right upper and lower teeth (symphysis to the right); enlarged inset teeth are the second upper lateroposterior and the fourth lower anteroposterior. Del. Peter A. McCrery.

Figure 6.

Nasolamia velox, S10-H47-53, 1400 mm, adult male: dermal denticles from dorsum below first dorsal fin. Scanning electron micrography by L.J.V.C., an oblique posterior photograph of denticle crowns.