PLATE V. 
Berenicea consimilis (Lonsdale). (Page 16.) 
Fig. 1. Portion of a zoarium, X 6, incrasting a Meristella and showing radiate arrange- 
ment of zooecia about centers of growth. 
Silurian, island of Gotland. 
2. Copy of Vine's illustration of this species. 
Wenlock shales, England. 
3, 4. Hall's figures of this species published under the name "An incrusting mem- 
brano-calcareous Coral" (Nat. Hist. New York, Pal. II, 1852, pi. 40 E, figs. 
8, 8a). 
Rochester shale, Lockport, N. Y. 
5. Several zooecia, X 20, of the Waldron form described by Hall as Sagenella < j le<jans. 
Waldron shale, Newsom, Tenn. 
Diploclema sparsum (Hall). (Page 17.) 
[See also PI. XXXIII figs. 4-6.] 
6, 7. Two fragments, natural size and X 9, of this abundant species showing the 
usual external features. 
Rochester shale, Lockport, N. Y. 
Diploclema sparsum arguium n. var. (Page 17.) 
8. A portion of a zoarium, X 12, exhibiting the greater number of ranges of zooecia 
and pore in front of the aperture, distinguishing this variety. 
9. Several zooecia of same with apertural pore. 
Rochester shale, Lockport, N. Y. 
Mitoclema sarlei n. sp. (Page 18.) 
10, 11, 12. Three fragmentary examples of this small species, natural size and X 9. 
Rochester shale, Rochester, N. Y. 
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