155 



623. A portion of the right ramus of the lower jaw of a Mammoth ; contain- 

 ing the socket of a large grinder and the remains of a smaller one ; the 

 large socket is divided into a small anterior compartment for the corre- 

 sponding anterior fang, and into a large cavity containing the principal 

 base of the molar. 



Locality unrecorded. Mus. Parkinson. 



624. Part of the left ramus of the lower jaw of the same Mammoth, showing 

 a socket of similar size and shape. 



Locality unrecorded. Mus. Parkinson. 



625. The symphysis of the lower jaw of the Mammoth. The relative breadth 

 of the suprasymphysial channel is less in this specimen of the American 

 Mammoth than in the English specimens with which it has been com- 

 pared. 



From the tertiary deposits of the Ohio, North America. 



Purchased. 



Tusks. 



626. The right tusk of a (male ?) Mammoth. It measures ten feet two inches 

 in length, and twenty-one inches in circumference at its base, and is 

 characterized by the degree and direction of its double curvature. 



From the tertiary formations of the Ohio, North America. 



Purchased. 



627- The right tusk of a (female ?) Mammoth : it presents the same double 

 curvature as the preceding specimen, which resembles that of the tusks 

 of the great Mammoth in the Museum at St. Petersburg from the icv 

 cliff at the mouth of the Lena in Siberia ; but the present tusk mea- 

 sures only five feet in length, and eleven inches in circumference at the 

 thickest part, and two feet four inches across the chord of its curve. 

 From the drift or diluvium of Cambridge. Purchased. 



628. A plaster cast of a mass of the conical layers of the ivory of a decom- 

 posing tusk of a (male ?) Mammoth, measuring twenty-two inches round 

 the base, and twenty inches from the base to the point of the detached 



x 2 



