150 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Slide. 
13. Melaphyr dikes and flows. 
Dike cutting slate; Hingham, Mass. Cl 
Base of flow; Hough’s Neck (Microgranite) .... 202 
Top of flow; Hough’s Neck (Feldspar free basalt). Plate 5, Eig. 15 201 
14. Granite dikes cutting the slate. 
Randolph Avenue, near Pine Tree Brook. Plate 5, Eig. 14 . 219 
