PLATE, V. 
LAOTIRA CAMBRIA (p. 32). 
Fic. 1. Subumbrella surface of an individual with 4 lobes. 
Fic. 2. Subumbrella surface of an individual with 4 lobes. The radial canal openings of the exum- 
brella lobes are shown at x, x. 
Fia. 3. A distorted specimen which has apparently 3 lobes. Owing tothe great variation in the size 
of the lobes, it is probable that it is imperfect, the fourth lobe having been turned under 
and merged by pressure into the larger lobe. 
Fic. 4. Subumbrella view of a small individual with 4 lobes. 
Fia. 5. A 5-lobed specimen, the outlines of which have been obscured by the siliceous matter 
deposited about it. 
Fic. 6. Exumbrella surface of a specimen with 6 lobes. 
Fic. 7. A common form of the exumbrella with 5 lobes. 
Fic. 8 A specimen in which the 5 lobes are compressed so as to give them a spiral appearance. 
Figs. 9, 9a. Exumbrella and subumbrella surface of a rotund specimen. 
Fic. 10. A large, 4-lobed individual, which is very much obscured by the siliceous matter deposited 
about it. 
Fias. 11, 11a. Exumbrella and subumbrella view of a 5-lobed individual preserving some of the 
characteristics of Brooksella alternata, as shown in Pl. I, figs. 4, 4a. 
Most of the specimens represented on this plate are more or less obscured by the siliceous 
matter deposited about them. The extent of this deposition is shown in the transverse sections on 
Pl. XXIII. 
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