NORTH AMERICAN EARLY TERTIARY BRYOZOA. 
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A. Operculum of Dakaria (Schizoporella) gelicla Waters, 1903. 
B. Interior of Dakaria ( Schizoporella ) gelida Waters, 1903. (After Waters.) 
C. Compensate x of Phonicosia sanguined Norman, 1S68. (After Harmer, 1902.) 
D. Operculum of Hippoponella hippopus Smitt, 1867. (After Waters, 1900.) 
E. Interior of HippoporeUa multilamellosa, new species, X 20. 
F. Compensates: of Hippodiplosia pallasiana Moll, 1803. (After Harmer, 1902.) 
G. Operculum of Smittina tripora Waters, 1903, X 85. 
H. Apertura of Smittina tripora Waters, 1903, X 85, with operculum and below it the avicu- 
larian glands with the mandible above the glands. 
I. Compensates of Smittina trispinosa Johnston, 1S37. (After Harmer, 1902.) 
J. Operculum of Microporella malusi Audouin, 1826. (After Waters, 1878.) 
K. Compensates and ascopore of Microporella malusi Audouin, 1826. (After Harmer, 1902.) 
b, polypide bud; bb, brown body; cond, condyle; corn, cornicula; c. s, compensates; m. p, 
ascopore (=median pores) ; occl, ocelusor muscles of operculum; op. gl, opercular glands; p. c, 
dietellae (=pore chambers) ; p. m, parietal muscles; p. v. m, parietovaginal muscles; z, zooecia. 
