BY E. BROOM. 13 



REFERENCES TO PLATE I. 



a.l.c, anterior process of lateral cartilage; J.c, Jacobson's cartilage; 

 J.d., Jacobson's duct; J.o., Jacobson's organ; Ic, lateral cartilage; Mx., 

 maxillary; n.f.c, nasal-floor cartilage; n.p.c, naso-palatine canal; n.v.c, 

 nasal-wall cartilage; vi.-s"., nasal septun.; p.Pmx., palatine process of pre- 

 maxillar}'; Pmx., premaxillary. 



Figs. 1- 9. — Transverse vertical sections through snout of fcctal Horse 

 (head length about 7*5 cm.) x 7- 



Figs. 1012. — Transverse vertical sections through snout of foetal Calf (head 

 length about 2 cm.) x 30. 



Dotted portion represents cartilage; parts shaded by lines represent the 

 regions of ossification. 



