LIST OF ILLUSTRATIONS. 



Plate I 

 Fig. 1. 



Fig. 2. 

 Fig. 3. 



Fig. 4. 



Fig. 5. 



Plate II.- 



FlG. 1. 

 Fig. 2. 

 Fig. 3. 

 Fig. 4. 

 Fig. 5. 

 Fig. G. 



1. -FLUTES. 

 ■North Pacific Phronimidte 



Page. 



Phronima atlantiea (female). Fifth thoracic foot; 1 a. Caudal 



appendages. 

 Phronima atlantiea (male). Fifth thoracic foot. 

 Phronima padfica (female). Fifth thoracic foot ; 3 a. Caudal 



appendages. 

 Phronimella elongata (male). Fifth thoracic foot ; 4 a. Caudal 



appendages. 

 Phronimella elongata (female). Fifth thoracic foot ; 5 a. Caudal 



appendages. 



-West Indian Myadestes 



Myadestes montanus Cory. 

 Myadestes soliiarius Baird. 

 Myadestes geniharhis Swainson. 

 Myadestes sanctce-luciw Stejneger. 

 Myadestes dominicanus Stejneger. 

 Myadestes sibilans Lawrence. 



26 



Plate III. — Laramie and Green River Molluscan Forms. 



98 



Unio clinopisthus (sp. nov.). 



Fig. 1. 

 Fig. 2. 



Left side view ; natural size. 

 Dorsal view of the same example 



Anomia micronema Meek. 



Fig. 3. View of the under valve, showing the hyssal plug. 

 Fig. 4. Exterior view of an upper valve. 



Fig. 5. Similar view of another example, showing coarser radiating lines. 



Fig. 6. Interior view of a very large upper valve, showing muscular scars 



and process beneath the umbo. AH of natural size. 



Campeloma prooucta (sp. noy.). 



Fig. 7. Lateral view of type specimen ; natural size. 



Fig. 8. Opposite view of the same. 



Fig. 9. Lateral view of a more robust example. 



Pyrgulifera humerosa Meek. 



Fig. 10. Lateral view of type specimen; natural size. 

 Fig. 11. Opposite view of the same. 

 Fig. 12. Similar view of a smaller example. 

 (VI) 



