248 Henry Fox 



Fig. C5. — Median thyroid, lateral thyroid, la. t., carotid gland, c. gl., and 

 prsecervical body, f. pe., In a 15 mm. cat. X 30. 



Fig. 66. — Lateral view of pharynx in a 23 mm. cat, No. 4(50, Harvard 

 medical collection. I. Tn., incissura tensoris ; Mn. F., manubrial fossa ; PI. B., 

 postero-lateral border of the tympanic pouch ; P. M. F., post-manubrial ridge ; 

 S. M. F., submeckelian fold ; Ton. F., tonsillar fold. X 60, reduced Vb. 



Fig. 67. — Dorsal view of the pharynx in a 23 mm. cat. P. R., recessus pos- 

 terior ; S. R., recessus superior, x 60, reduced V^- 



Fig. 68. — Lateral view of pharynx and mouth in a 32 mm. cat, Harvard 

 medical collection ; a doubtful body of lymphoid nature, x 60, reduced Vb. 



Fig. 69. — Dorsal view of pharynx in the same cat. X 60, reduced Vs. 



Fig. 70. — A part of the pharynx, including tympanic pouch and tonsillar 

 fold in a 14 days rabbit, viewed from the posterior side. Symbols as in Fig. 

 26. X 30. 



Fig. 71. — Part of the pharynx in the region of the tympanic pouch and 

 tonsillar fold, rabbit, 161/2 days, x 30. 



Fig. 72. — Part of the pharynx in an 18 days rabbit. Harvard medical col- 

 lection, i. tn., incissura tensoris; p. pi., palatine constriction; p. r., recessu* 

 posterior ; ton. f., tonsillar fold. X 30. 



Fig. 73. — The posterior portion of the pharynx of a rabbit of 21 days, 

 Harvard medical collection, viewed from the front. The nasopharynx is 

 represented as sectioned close to the base of the Eustachian tubes and the 

 oral pharynx immediately in front of the tonsils. E. Au., external auditory 

 meatus; Epi., epiglottis; G. Ep., glossi-epiglottic fold; I. Tn., incissura ten- 

 soris; Mk. F., Meckelian fossa; Mn. F., manubrial fossa; S. Pi., sinus piri- 

 formis; Ton., F., tonsillar fold; V. Ton., inferior tonsillar recess. X 30, re- 

 duced %. 



ABBREVIATIONS. 



A-L. F., alveolar-lingual fold. 

 Ao. 2-5, 2d to 5th aortic arches. 

 Car., carotid artery. 



C. Gl., carotid gland. 

 Ch. Ty., chorda tympani. 

 Coch., cochlea. 



CV., concavity on ventro-lateral surface of tonsillar fold. 

 Cv. C, cervical cord of the thymus. 



D. A. 1-3, dorsal apex of first to third pouches. 

 D. Ao., dorsal aorta. 



dct., duct of the lateral thyroid. 



d. 1. s., dorso-lateral wall of the tympanic pouch. 



D. Pc, ductus prsecervicalis. 



D. PI., dorsal plate of the thymus. 



