£ 
Plate 78 
This plate from Proceedings of the United States National Museum. 
FIGURE PAGE 
1. Bittium attenuatum Carpenter. 21 
2. Bittium attenuatum Carpenter . 21 
Type of B. esuriens . 
3. Bittium attenuatum multifilosum Bartsch. 22 
Type. 
4. Bittium attenuatum boreale Bartsch. 22 
Type. 
5. Bittium attenuatum ^ Bartsch. 21 | 
Cotype. 
6. Bittium attenuatum latifilosum Bartsch 
Type. 
22 
