FLINTY SKELETON OF VENUS FLOWER BASKET (EUPLECTELLAj, 

 A JAPANESE DEEP-SEA SPONGE 



EGG i>i-.i'<>Mi<>Ky OK Semotilus Atrminiciilalus 



la tbc building of thk egg depository, the male fish takes stones from the bottom of the stream, gripping them in his mouth, and 

 heap* them up into tbc lam. In the egg depository he arranges the stones so that when the eggs are deposited in the interstices they 

 I* thoroughly protected, aad cannot be washed down-stream. 



I. d*n> of none*; 2, cc depoaitory ; j. hillock of sand. The arrow shows the direction of the stream. Upper fish, male ; lower, 



