475 



2675. The lower jaw of an older Elephant. 



Twelve plates and the common dentinal base of a few anterior plates of the penultimate 

 molar tooth are worn, and some of the posterior unworn plates are exposed ; behind which is 

 seen a gubernacular orifice leading to the socket of the succeeding molar. 



Hunterian. 



2676. The right ramus of a somewhat older but smaller (female?) Elephant. 



The last nine plates of the penultimate molar are worn, and the first three plates of the 

 succeeding molar have begun to be abraded. 



Presented by Dr. Henderson. 



2677. A somewhat larger lower jaw of an Elephant. 



The last remnant of the penultimate molar is retained, and the first eleven plates of the last 

 molar have been in use. 



Hunterian. 



The following are parts of the skeleton of a young Asiatic Elephant : 



Hunterian. 



2678. The atlas. 



The articular surfaces for the occipital condyles are reniform, and a smooth compact layer 

 of bone encroaches upon the part corresponding to the pelvis of the kidney. The posterior 

 articular surfaces are confluent with that for the odontoid process. The short transverse pro- 

 cesses are widely perforated for the medullary artery, which afterwards perforates on the left, 

 and grooves on the right side, the fore part of the neurapophyses. 



2679. The vertebra dentata. 



The anterior articular surfaces are continuous with that below the odontoid process : traces 

 of the original separation of this process remain on the middle line above and below. The 

 short and thin transverse processes are widely perforated. The thick obtuse spine bifurcates 

 posteriorly. The hinder epiphysis of the body of the dentata is unanchylosed. 



2680. The third cervical vertebra. 



The neurapophyses are united with the centrum and with each other, below, by suture ; 

 they have coalesced together above : they form the upper fourth of the body of the vertebra, 

 and the epiphyses, which are unanchylosed, are coextensive with both the neurapophysial 

 and central parts of that body. 



2681. The fourth cervical vertebra. 



The costal part of the transverse process is produced forwards. 



3 p 2 



