Cranial Nerves of Anolis carolinensis. 



PLATE 4. 



The sections represented in Plates 4-7 were selected at intervals through the 

 series from v\:hich the projection drawings (Plates 1 and 2, figs. 4-6) were made. 

 The scale included in these drawings (Figs. 4, 6) shows the position of every 

 hundredth section in the series. The planes of the sections shown in figures 

 8-24 may be determined by referring their numbers to this scale. Branches 

 of minor importance which axe not included in the plottings may appear in the 

 sections. No importance can be placed on a close comparison of the relative 

 diameters of the nerves. These have suffered shrinkage to a different degree 

 in different parts of the head and are represented approximately as they appear 

 in the sections, while they are for the most part enlarged and made uniform in 

 the plottings in order to demonstrate their components. The sections were 

 drawn as projected by the camera and are accurate in respect to those struc- 

 tures which are considered. 



Fig. 8. Transverse section (No. 130) anterior to external nares. The space 

 between the nasal cartilage and the premaxiUary bone is filled with pericapsular 

 vascular tissue. The median palatine rami are here united. The sublingual 

 gland opens by three ducts (one median, two lateral) anterior to this section. 

 Labial glands open by numerous ducts. The mucous membrane in the floor 

 of the mouth has numerous taste buds located between the gland openings and 

 in the epithelium just median to the upper and lower jaws. 



Fig. 9. Transverse section (No. 319) tkrough nasal organ, showing external 

 and internal nasal chamber and external nasal gland. The tongue is cut 

 through the region of the greatest development of the lingual papillae, the out 

 lines of which are represented somewhat diagrammatically. The muscle fibers 

 extend to the ends of these, which are provided with long protruding epithelial 

 cells. The taste buds are seen along both upper and lower lingual gum at 

 points indicated {gm. gus. I.). No taste buds were observed on the papillae. 

 A single taste bud was found near the median line in the roof of the mouth, 

 while on the floor of the mouth they appear to be limited to the lingual gum. 



Fig. 10. Transverse section (No. 579), through ethmoidal ganglion and 

 internal nares, just anterior to the orbit and the larynx. In addition to the 

 series of taste buds found in section No. 319, they appear along the lateral 

 border of the tongue in the stratified epithelium between the openings of the 

 tubular glands. 



Fig. 11. Transverse section (No. 659) cutting into, the anterior waU of the 

 eyeball and through the Harderian gland. The muscles at the root of the 

 tongue are diverging to each side of the larjoix, which is here cut through the 

 glottis. The two laryngeal muscles appeal-. 



