JOURNAL OF MICROSCOPICAL SCIENCIl. 



DESCRIPTION OF PLATE I, 

 Illustrating Mr. C. S. Tomes' Paper on the Teeth of Pike, 



Fio. 1. — Diagram of roof of pike's moutli, showing the directions in wliich 

 alone the several teeth forming the vomerine and palatine bauds 

 are capable of being bent. 



Fig. 2. — Anchylosed tooth of pike, somewhat diagrammatic. 



a, central core of osteo-dentine; d, lajer of fine-tubed dentine, 



Fig. 3. — Hinged tooth of pike, somewhat diagrammatic. 



6, empty pulp cavity ; h, fine rods of calcified tissue. 



Fig. 4. — Section of hinged tooth i?i situ. 



e, fibrous hinge ; /, buttress of bone on which the tooth is received ; 

 k, bone of jaw. 



Fig. 5. — Section of hinged tooth in situ, more highly magnified. The fine 

 bands {h) which tie the tooth down to the bone are seen to 

 be continuous both with the dentine and the bone. 



Fig. 6. — Point of attachment of one of the bands {h) with the bone (A:), 

 the surface of which is clothed with osteoblasts (o). x 300. 



Fig. 7. — Calcified portion of the axial bands, from high up in the tooth ; 

 between the rigid rods {h) is a fine network of cobweb-like 

 tenuity (/). X 400. 



Fig. S. — Point of attachment of one of the rods to the subjacent bone, 

 showing that it is made up of many fibres (i). X 500. 



