58 



214. Four pairs of premaxillary bones of the same, or an allied species of Sargus \ two 



of the successional incisors are shown in one of the specimens : the molariform 

 teeth are in three rows, the middle row being the smallest and least regular in 

 position. Hunterian. 



215. The premaxillary and premandibular bones and the teeth of a young individual 



or small species of Sargus. Hunterian. 



216. A similar specimen. Hunterian. 



217. The upper and lower jaws of a Sparoid fish, with six incisors above and eight 



below, succeeded by numerous hemispheroid molar teeth, as in the Sargus 

 rufescens. Hunterian. 



218. The premaxillary and maxillary bones of a large Sargw. Hunterian. 



219. The premandibular bones of the same fish. In the upper jaw the molars are 



arranged in three rows, the innermost being the largest, those of the middle 

 row the smallest and least regular. In the lower jaw the molars are in two 

 rows, the middle row not being developed in this jaw. Mm. Brit. 



220. The premandibular bones and teeth of a species of Sargus with eight lower 



incisors. Mus. Srit. 



221. A similar specimen. Mus. Brit. 



222. The premandibular bones of a Sparoid fish (Sargus) with eight incisive teeth : 



they singularly resemble the human incisors in the size and shape of the crown ; 

 but their base is anchylosed to the substance of the jaw. Hunterian. 



223. A similar but smaller specimen of the premandibulars of a Sargus, showing the 



crowns of the two median successional incisors protruding on the outer side 

 of the bases of their predecessors. The orifices leading to the concealed alveoli 

 of the successors of the other incisors, are seen in the same relative position 

 to the bases of those incisors. In the human subject, to the incisors of which 

 those of the Sargus bear a close resemblance, the successional teeth appear on 

 the inner side of the bases of the deciduous ones. Mus. Brit. 



