PLATE LIX. 
PAGE 
Fig. 1. Calyptr.ea aperta (Solander) 247 
1. Dorsal view. Plum Point. 
Figs. 2a-2c. Calyptb.ea centralis ( Conrad ) 248 
2a. Dorsal view. St. Mary's River. 
2b. Ventral view of the same specimen. 
2c. Lateral view of the same specimen. 
Figs. 3a, 3b. Calyptr.ea greensboroensis n. sp 248 
3a. Interior of specimen from Greensboro. 
3b. Exterior of the same specimen. 
Figs. 4a, 4b. Crepidula fornicata (Linno) 249 
4a. Exterior of specimen from Cove Point. 
4b. Interior of the same specimen. 
Figs. 5a, 5b. Crepidula plana Say 250 
5a. Exterior of specimen from Plum Point. 
5b. Interior of the same specimen. 
Figs. Ca-6d. Amaltiiea .aiabylaxdica n. sp 251 
6a. Exterior of a specimen from Greensboro. 
6b. Interior of the same specimen (muscular scars drawn from a 
specimen from Jones Wharf). 
Cc. Lateral view of the same specimen. 
Gd. Beak of the same specimen, much enlarged. 
Figs. 7a-7c. Xenopiiora conchyliopiiora (Born) 251 
7a. Exterior of a specimen from Plum Point. 
7b. Interior of the same specimen. 
7c. Lateral view of the same specimen. 
