* ' 



: : 





Tegminal cartilage 

 Composite optic lobes 

 Pineal body 

 Cavity of cerebral lobes 

 Supraorbital bar 

 Cerebral lobes 

 Obliquus sup. of outer eye 

 Recti sup. of inner eyes 

 Rectus int. of inner eyes 

 Obliquus inf. of outer eves. 

 Palato-pterygoid cart. 

 Trabeculae cranii 



Nerve II (of one of the inner eyes) 

 Rectus inf. (of one of the inner eyes) 

 Nerve II of the other inner eye 

 The united inner palato-pterygoids 

 The united inner Meckel's cartilages 

 Soft tissues of the composite lower jaw 





PI. XIII. rig. 48 mnion at medulla). IT. 



sections of a double monster similar to this 



lobes. For plane of section see PI. XXI. figs. 88-90. I )tln-r references are 



given under PI. I. fig. 4. (x2O.) 



Optic lobes 

 Cavity of optic lobes 

 Mucous groove 

 Supraorbital bar 



Infundibulum 



Rectus oc. sup. 



Retina 



Lens 



Rectus oc. int. 



Rectus oc. inf. 



Rectus inf. and sup. of one of the 



inner eyes 



Palato-pterygoid bar 

 Trabeculae cranii 

 Meckel's cartilage (visceral bar I) 

 Hyoid cartilage (visceral bar II) 

 Visceral bar III 

 Copula bar III 

 FIG. 36. section from san 



across the n:iddle of the outer eyes. Ti < \ the 



composite optic lobe region li;i . : are 



doubled. A few of the muscles bel<> 

 near their origins. In the fie 



ind the copula of the tl; h I']. III. figs, r | 



; (normal). For othei < . 4, and for pi 



> PI. XXI. figs. 88-90, line 36 I y 20.) 



J. F. G. 



PI.. VIII. 



VIII 



