OBITUARY NOTICE OF A LUNG-FISII. 39 



fore, some of the coprolites from early geological horizons which 

 have generally been referred to sharks may have belonged to contempo- 

 rary lung-fishes. The fecal material at the time it is deposited appears 

 as in Fig. 7a; after remaining in the water for several hours it pre- 

 sents the appearance 7h, and finally, after twenty-four hours, uncoils 

 as in Fig. 7 c. 



The air-breathing movements of the fish were irregular. At times 

 it would come to the surface about every five minutes and swallow a 

 mouthful of air; then again several times this period would elapse 

 before the fish would rise to the surface. In all cases escaping air 

 passed out through the gill clefts, usually through those on the left 

 side. 



