Fig. 47. Lateral view of cranium. Heptanchus maculatus. 



ex.h 



Fig. 48. Lateral view of skull, with branchial arches removed, Reptanchus maculatus. 

 (Duncan Dunning, del.) 



a.c, auditory capsule; a.pr., antorbital process; h.a., basal angle; h.r., branchial rays; 

 ex.h., extrahyoid cartilage; /.//, optic foramen; f.IIl, foramen for oculomotor nerve; f.IV, 

 trochlear foramen; f.VIP, foramen for hyomandibular branch of facial nerve; f.IX, fora- 

 men of glossopharyngeal nerve; f.a.c, foramen of anterior cerebral vein; f.o.VII, foramen 

 for ophthalmicus superficialis nerve (leaving orbit) ; f.r.a., foramen for ramus anastomoti- 

 cus artery; i.o., interorbital canal; I., labial cartilage; md., mandible; n.c, nasal cartilage; 

 o.f., orbital fissure ; o-n., anterior opening of the orbitonasal canal ; o-n.^, posterior opening 

 of the orbitonasal canal ; ol.c, olfactory capsule ; p-q., palatoquadrate cartilage ; po.o., 

 postorbital process; pr.o., preorbital process; qd.p., quadrate process; s.o., supraorbital 

 crest. 



