162 



BULLETIN OF THE 



EXPLANATION OF THE ABBREVIATIONS EMPLOYED IN 

 DESCRIBING THE FIGURES. 



to. t. Maxilloturbinal. 



n. t. Nasoturbinal. 



tr. I. Transverse lamina. 



ect. t. Ectoturbinal. 



end. t. Endoturbinal. 



ect. sp. Ectoturbinal space. 



end. sp. Endoturbinal space. 



s. t. sp. Septoturbinal space. 



to. e. Meso-etlimoid. 



sp. t. Septoturbinal. 



Jr. Frontal. 



op. f. Optic foramen. 



cr. gl. Crista galli. 



orb. sjih. Orbitosplienoid. 



n. p. s. N on -perforate space. 



I. Lobule. 



ol. pi- Olfactory plate. 



orb. pi. Orbital plate. 



EXPLANATION OF FIGURES. 



PLATE I. 



Fig. 1. Sagittal section of head of the dog, showing the oblique position of the encra- 

 nial surface of the ethmoid bone, with the median aspect of the lateral mass 

 of the same bone. A portion of the septum has been included in the sec- 

 tion at the transverse lamina. The horizontal line between the asterisks 

 represents the dividing line between the olfactory and the respiratory re- 

 gions of the nasal chamber. — It is probable that some variation will be 

 found to exist in the turbinals of the domestic dog. Natural size. 



Fig. 2. Frontal section of the nasal chamber of the dog, a short distance in advance 

 of the encranial Burface. Natural size. 



Fig. 3. Diagrammatic representation of the encranial surface of the dog. Natural 



size. 



Fig. 4. Encranial surface of the otter. Natural size. 



Fig. 5. Diagrammatic frontal set tion of the turbinals of the otter. Natural size. 



Fig. 1. 

 Fig. 3. 



TLATE II. 



Median surface, of lateral mass of ethmoid lone of Cebus capuccinus. Nat- 

 ural size. 



The under surface of same. Natural size. 



The under surface of lateral mass of the human ethmoid bone. Natural 



size. 



