SKULL OF A 43-MM. HUMAN FETUS. 



103 



m. stap. 



mal. 



man. 



manub. 



mas. ang. 



max. 



meat. ac. int. 



mem. muc. 



mes. incis. 



mes. interpar. 



mes. man. 

 mes. max. 

 mes. pal. 

 mes. vom. 



n. alv. inf. 



n. aur. tem. 



n. fac. 



n. infraorb. 



n. ling. 



n. man. 



n. max. 



n. men. 



n. ophth. 



n. pet. superfic. ma] 



o. 



orb. 



org. vom. nas. 



os. basiocc. 



os. oxocc. 



os. Meek. 



os. supraocc. 



pal. 

 par. 



prsecart. ary. 

 proc. alar, 

 proc. alar. eup. 

 proc. art. sup. 

 proc. asc. 

 proc. cond. 

 proc. coron. 



musculus stapedius 



malleus 



mandibula 



manubrium mallei 



massa angularis 



maxilla 



meatus acousticus internus 



membrana mucosa 



condensed mesenchyme of incisive bone 



condensed mesenchyme of interparietal 



bone 

 condensed mesenchyme of mandible 

 condensed mesenchyme of maxilla 

 condensed mesenchyme of palate bone 

 condensed mesenchyme of vomer 



nervus alveolaris inferior 



nervus auriculotemporal 



nervus facialis 



nervus infraorbital 



nervus lingualis 



nervus roandibularis 



nervus maxillaris 



nervus mentalis 



nervus ophthalmicus 

 , nervus petrosus superficialis major 



orificium, in the otic capsule, the result 

 of incomplete chondrification 



orbita 



organon vomeronasale 



preossification center of the basioccipital 

 cartilage 



preossification center of the exoccipital 

 cartilage 



preossification center of Meckel's car- 

 tilage 



preossification center for the supra- 

 occipital cartilage 



os palatinum 



os parietale 



prsecartilago arytsenoidea 



processus alaris 



processus alaris superior 



processus articularis atlantis superior 



processus ascendens 



processus condyloideus 



processus coronoideus 



proc. 

 proc, 

 proc. 

 proc. 

 proc. 

 proc. 

 proc. 

 proc 

 proc 

 proc 

 proc. 

 proc. 

 proc. 

 proc. 

 prom 

 prom 

 prom 

 prom 



cup. ant. 



cup. post. 



desc. 



intraper. ant. 



intraper. post. 



mast. 



max. post. 



meat. med. 



paracond. 



paranas. 



parasep. 



sty. 



ven. lat. 



zyg- 



am. post, 

 dor. for. 

 nas. sup. 



rad. n. trig, 

 ram. incis. 

 rec. utric. 



sac. 



sac. endolym. 

 sac. lac. 

 sep. interorb. 

 sep. nasi 

 sep. spir. 

 sp. ut. 

 sq. tem. 



St. 



sul. occ. par. 



sul. sep. 



sul. Buprasep. 



sut. inc. 



teg. tym. 



tub. aud. 



tub. jug. 



tub. sel. 



tun. muc. phar. 



tym. 



vom. 



processus cupuians anterior 



processus cupularis posterior 



processus descendens 



processus intraperilymphaticus anterior 



processus intraperilymphaticus posterior 



processus mastoideus 



processus maxillaris posterior 



processus meatus medii 



processus paracondyloideus 



processus paranasalis 



processus paraseptalis 



processus styloideus 



processus ventrolateralis 



processus zygomaticus 



promontorium 



prominentia ampullaris posterior 



prominentia dorsalis foraminis magni 



prominentia nasi superior 



radix nervi trigemini 

 ramus incisoris 

 recessus utriculi 



sacculus 



saccus endolymphaticus 



saccus lacrimalis 



septum interorbitale 



septum nasi 



Beptum spirale 



spatium utriculi 



squama temporalis 



stapes 



sulcus oc.cipitoparietalis 



sulcus septalis 



sulcus supraseptalis 



sutura incisiva 



tegmen tympani 



tuba auditiva (Eustachii) 



tul)crculum jugulare 



tuberculum sellae 



tunica mucosa pharyngea 



os tympanicum 



vomer 



zyg. os zygomaticum 



3, 4, 5, 6, 7, vertebra cervicales 



COLOR SCHEME OF PLATES. 



In general, blue is used to indicate cartilage and precartilage, yellow to indicate bone, and green for beginning 

 ossification centers. Cut edges are white. The chief departures from this scheme are as follows: 



Plate 2. — Figure 7, brain green; figure 8, mesenchyme green; figure 11, mucous membrane of pharynx yellow; 

 figures 12 and 13, paraseptal cartilage and precartilage green. 



Plate 8. — Figures 15 and 16, mucous membrane of auditory tube yellow, nerves and ganglia green. Figures 17, 

 20, and 23, young cartilage green; figures 18 and 21, cavity of otic capsule green; figures 19 and 22, membranous 

 labyrinth yellow. 



Plate 4- — Figures 28, mesenchyme green; figures 30 and 36, developing teeth yellow, mesenchyme green; figures 

 33 and 35, ossifying perichondrium green. 



Plate 5. — Figures 37, 38, 40, 42, and 44, mucous membrane yellow, precartilage green; in figure 37, epithelium of 

 Jacobson's organ green; in figures 38 and 40, mesenchyme white; in figure 41, teeth yellow, precartilage green, mesen- 

 chyme and epithelium of nasolacrimal duct white. Figures 43, 45, 46, and 47, precartilage green. 



