Bull. U. S. F. C. 1 897. 0"o face page 426.) 
Plate XVII. 
23 24- 2LS 
2 7 
IRREGULAR BAROQUE PEARLS. 
Nos. 1-3, 5-10, 16-19, 23, 32, 33. Covered with small protuberances, prickly or warty. 
Nos. 11-15. Elongated, twisted, and flattened. 
No. 31 . Doubtless enclosing a large mass of foreign material, perhaps clay or a pebble. 
