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128 Scientific Intelligence. 
in a vertebra forming the anterior extremity of the series; and the 
typical condition of = prefrontals, so well shown in fishes and saurians, 
y the enormous development of the capsules 
organ of neo nes to thaws which become ossified and par- 
tally endian to the compress alesced prefrontals ; 
ole forming the composite bone called “ thmoid” in anthro- 
The vomer, or body of the nasal vertebra, has undergone 
potomy. 
an analogous modification to that which the terminal vertebra of the 
tail presents in birds ; whence its special name, seicnene to the like- 
ness to a ploughshare, in human anatomy. e spine, or nasal bone, 
is sometimes single, sometimes divided, like the frontal, the parietal 
and the supraoccipital bones. eir ‘special adaptive modifications 
have obtained for them special names. 
The hemal arches conmapedisg with the above neural arches re- 
tain most of their natural position and proportions, as might be expect- 
ed, in fish ; they are called the scapular, hyoid, mandibular, and 
maxillary pik 8 The LA, of i occipital vertebra is the 
eke: and is comm ee attac bya and tubercle to the cen- 
hyoidean arch resuming its normal connexions in many ma smal, Sa 
stylo-hyal element being directly aniculated to the mastoid: in 
the large petrosal capsule interven s, and contracts that anhyon with 
this know tang of the general Ses of the palatine, an insight 
was gained into its singular disposition in man, creeping up, as It were, 
afinity orbit, to touch the pars plana of the zthmoid ; this secret 
of the nasal vertebra, and therefore retaining, as such, more oF ess 0 
its essential connexion with the centrum (vomer) and neurapophyses 
(zthmoid or prefrontal) of the nasal vertebra comet the mai 
series, . 
