154 



SPIEOPOEA. 



Zocecia numerous, in regular spirals. Below the points of 

 bifurcation the rows of peristorues become less oblique, and rise 

 to ten in number. Elsewhere seven or eight zooecia can be seen 

 in a single row across one face of the stem. Zooacia are short and 

 cylindrical ; peristomes well raised. 



FIG. 10. Longitudinal section through half of zoarium of Spiropora 

 richmondiensis (Vine), X 22 dia. Great Oolite: Richmond boring. 

 D. 1929. 



DISTRIBUTION. 



Great Oolite: Richmond boring (1205 ft. deep). 

 Inferior Oolite : Dorset (fide Watford). 



Description of Figure. PL IX. Pig. 2. Part of Vine's type, 

 X 17 dia. Great Oolite : Richmond boring. Presented by 

 Prof. J. W. Judd, C.B., F.R.S. D. 1935. 



Affinities. This well-marked species resembles E. ccespitosa, 

 Lamx., by the thinness of its branches, but from this it differs by 

 the greater number of zooecia in these, and consequently the greater 

 number of apertures in a series. It differs from 8. elegans, Lamx., 

 and 8. annulosa, Mich., by having the rows of apertures spiral 

 instead of horizontal. It resembles 8. abbreviata by the elevation 

 of the peristomes and the closeness of the apertures. But in the 

 Richmond species the branches are thinner, and the rows more 

 regular : these seem to entitle it to a specific distinction ; but it 

 must be placed as a close ally of 8. abbreviata. 



LIST OF SPECIMENS. 



D. 1935. Great Oolite. Richmond boring (1205ft.). Vine's type. Figd. 



PI. IX. Fig. 12. 

 D. 1897-8, D. 1907, D. 1929-30, D. 1932. Richmond boring (1205ft.). 



