EXPLANATION OF PLATE XIIL. 
SURCULA STRIGOSA Gabb (p. 105). 
FIGS. 1. View of the fragment supposed to be the type. 
CITHARA MULLICAENSIS Whitf. (p. 106). 
2,3. Front views, one natural size and one enlarged, of a specimen retaining the shell. 
4,5. Two views of a cast. 
6. View of a larger cast from the same locality. 
CITHARA CROSSWICKENSIS Whitf. (p. 107). 
7,8. Two views of the best cast yet found. — 
ROSTELLARIA CURTA Whitf. (p. 109). 
9,10. Views of the opposite sides of a cast showing the features described. 
11. View of a second cast. — 
12,13. Two views of a specimen retaining fragments of shell. 
ROSTELLARIA FUSIFORMIS Whitf. (p. 110). 
14,15. Two views of the most perfect cast observed. 
ROSTELLARIA SPIRATA Whitf. (p. 109). 
16,17. Two views of a characteristic cast of the species. 
ROSTELLARIA COMPACTA Whitf. (p. 108). 
18,19. Views of a very compact cast showing a ridge on the front of Fig. 18. 
20,21. Views of a second cast which is less compact. Acad. Nat. Sci., Phila. 
ANCHURA (DKAPANOCHILUS) COMPRESSA Whitf. (p. 117). 
22,23. Two views of a large cast from Freehold, New Jersey. 
24,25. Views of a cast showing a shorter spire. From the collection of Columbia College. 
324 | 
