PLATE LXI. 
PACE 
Pig. 1. Calliostoma BELLUiM (Conracl) 256 
1. Ventral view. Miocene ot Maryland. Wagner Free Institute of 
Science. 
Figs. 2, 3. Calliostoma philanthropus (Conrad) 256 
2. Ventral view, 2 miles south of Governor Run. 
3. Ventral view of typical form. U. S. National Museum. (After 
Dall.) 
Fig. 4. Calliostoma piiila.xthropus var 257 
4. Ventral view. Jones Wharf. 
Fig. 5. Callicstoma viroinicum ( Conrad ) 257 
5. Ventral view. Miocene of Maryland. Wagner Free Institute of 
Science. 
Fig. 6. Calliostoma distans (Conrad) 258 
6. Ventral view. St. Mary's River. 
Fig. 7. Calliostoma EnoKEUM (Wagner) 259 
7. Ventral view. Reed's. 
Fig. 8. Calliostoma wagxeri Dall 260 
8. Ventral view. Greensboro. U. S. National Museum. (After 
Dall.) 
Figs. 9-11. Calliostoma apitelium Dall 260 
9. Ventral view. Jones Wharf. U. S. National Museum. (After 
Dall.) 
10a. Profile of specimen from Jones Wharf. 
10b. Same specimen seen from above. 
11. Specimen seen from below. Cordova. 
Fig. 12. Calliostoma peealveatum (Conrad) 261 
12. Ventral view. Plum Point. 
Figs. 13a-13c. Calliostojia humile (Conrad) 261 
13a. Profile of specimen from St. Mary's River. 
13b. Upper view of same specimen. 
13c. Lower view of the same specimen. 
Figs. 14a-14c. Calliostoma reclusum ( Conrad ) 262 
14a. Profile of specimen from St. Mary's River. 
14b. Upper view of same specimen. 
14c. Lower view of same specimen. 
Figs. 15a, 15b. Calliostoma marylandicum n. sp 263 
15a. Profile of specimen from Plum Point. U. S. National Museum. 
15b. Same specimen as seen from above. 
Figs. 16a-16c. Calliostoma calverta.n'um n. sp 263 
16a. Profile of specimen from Plum Point. 
16b. Same specimen as seen from above. 
16c. Same specimen as seen from below. 
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