taen.tect.med. 



arch 



Fig. 10 Lateral view of the chondrocranium and visceral arches of a larva of 

 Syngnathus fuscus, 12 mm. long. Drawing made from wax model 150 times the 

 actual size of the chondrocranium. Ratio of drawing to model, 1 :3. 



Fig. 11 Dorsal view of the same model as shown in figure 10. 



ABB rev: 

 br.I-V, branchial arches I to V. 

 C.C., copula communis 

 ct.h., ceratohyal cartilage 

 ect., ectethmoid cartilage 

 eth., ethmoid plate 



f.hcr.p., fenestra basicranii posterius 

 f.hyp., fenestra hypophyseos 

 Jjny.vent., fenestra myodomous ven- 



tralis 

 f.m., foramen magnum 

 f.VII, foramen for exit of ramus hyo- 



mandibularis facialis 

 For.hyom.VII, foramen in hyomandib- 



ula for ramus hyom.fac. 

 hyom., hyomandibula 

 hyp.h., hypohyal cartilage 

 j.r.p., junction rostro-palatinus 

 Mk., Meckel's cartilage 



mpt.pr., metapterygoid process 



nch., notochord 



occ.arch., occipital arch 



of.c, otic capsule 



pal., palatine cartilage 



pch., parachordal cartilage 



ph.br., pharyngobranchial cartilage 



pt.qu., pterygoquadrate cartilage 



po.pr., postorbital process 



pr.pr., prootic process 



r.c, rostral cartilage 



rs.p., rostral process of the ethmoid 



styl.h., stylohyal cartilage 



S7J771., symplectic cartilage 



taen.tect.med., taenia tectum medialis 



trab.comm., trabecula communis 



trab.cr., trabecula cranii 



445 



