256 
SPIROPORA. 
Char. — Zoarium of small branches, 'svith flat-fronted zooecia and distant 
apertui’es. 
Distrib. — Rhodanian : Yassy, Ilaute-^Iarne. 
33. aulostoma (Hamm), 1881. 
Syn. Th((hui(]('lhi aulostoma^ Hamm, 1S81. Bry. mastr. Ober-Sen. pt. i. p. 26. 
Char. — Possibly the encrusting base of an Entalophoro . 
Distrib. — Senouian — ^laastrichtian : Maastricht. 
SPIROPORA, Lamouroiix, 1821. 
[E.xpos. Metli. p. 47.] 
Synonymy. 
Piifttulopora, de Blainville. 
Cricopora, de Blainville. 
Entalophoux^ parx, Waters, etc. 
Diagnosis. 
PlntalophoridiE in wliich the apertures of the zooecia open in 
regular annular or spiral lines. Zooecia regularly cylindricaU 
Avith widely open circular apertures. 
Type Species. 
Spiropora elegans, Lamourou.x, 1821. Expos. Meth. p. 47,. 
pi. Ixxiii. figs. 19-22. Bathonian : Erance. 
Affinities. 
This genus is conA cniently retained to include those Entalophoiids 
in which the apertures occur in verticels or spirals. A certain 
irregularity occurs in some Cretaceous species of Spiropora, as also 
in the Cainozoic species described by Mr. Waters.’ . 
1. Spiropora verticillata (Goldfuss), 1827. 
Synony^my. 
Ccriopom verticillata, Goldfuss, 1827. Petref. Germ. vol. i. p. 36, pi. .xi. fig. 1. 
,, ,, Morren, 1828. Cor. foss. Belg. : Ann. Acc. Groning. 
1828, p. 40. 
,, ,, Arcbiac, 1846. Crrt. Vers. Plat, centr. : Mem. Soc. geoh 
Fr. ser. 2, vol. ii. p. 78. 
’ A. W. Waters. Foss. Cycl. Australia : Quart. Journ. Geol. Soc. vol. xL 
(1884), p. 680. N. Ital. Bry. pt. ii. : ibid. vol. xlviii. (1892), p. lo8. 
