Pséudobrancliial and £îarotid Arteries in the Gnathöstome Fislies. 13^ 



Explanation of plate. 



aa I afferent artery of first branchial arch 

 aa II afferent second branchial artery 

 ahy afferent artery of hyoidean arch 

 amd afferent artery of mandibular arch 

 cc common carotid artery 

 ch choroid gland 

 CS cephalic sinus 

 da dorsal aorta 



ea I efferent artery of first branchial arch 

 ea II efferent artery of second branchial arch 

 ee external carotid artery 

 ehy efferent artery of hyoidean arch 

 emd efferent artery of mandibular arch 

 hop hyo-opercularis artery 

 ic internal carotid artery 

 Ida lateral dorsal aorta 

 om ophthalmica magna artery 

 on orbitonasal artery 

 op optic artery 

 psh mandibular pseudobranch 

 Fj_5 Vessels Vj_5 of Raffaele's descriptions. 



Plate 9. 



Diagrammatic representation of the carotid and 

 related arteries. 



Fig. 1. In young embryo of Scylliidae. 



Fig. 2. In older embryo of Scylliidae. 



Fig. 3. In adult Mustelus antarctieus. 



Fig. 4. In adult Chlamydoselachus anguineus. ^ 



