120 GLOBULAR SPONGES ARTIFICIALLY PERFORATED. CHAP. Tii. 



argument in favor of theii* having been used as necklaces or 

 bracelets, appears to me a sound one. He says he often found 

 small heaps or groups of them in one place, all perforated, just 

 as if, when swept into the i-iver's bed by a flood, the bond 

 which had united them together remained unbroken.* 



* Rigollot, Memoire sur des Instruments en Silex, &c., p. 16, Amiens, 1854. 



