52 



ANNUAL REPORT OF 



lump of clay perforated by several round holes. On the rising of the water at 

 the next rainy season the Lepidosiren pushes out the plug and soon emerges 

 from its burrow. The breeding season begins soon after the escape of the 

 fish." 



Fig. 7. 



Dipterus valenciennesi Sedgw. and Murch. Lower Old Red Sandstone; 

 Scotland. Lateral aspect, restored. X 3 A- (From Dean.) 



