PLATE XII. 
Figs. 1, la.—Le1oporELLA contort, Hinde, sp. nov. (Page 206.) 
Fig. 1.—A specimen showing the outer surface of the wall with the oscules, now enlarged by 
weathering. Natural size. From the Inferior Oolite, Parkinsoni-zone, at Burton Bradstock. 
(Collection G. J. Hinde.) 
Fig. 1 a.—Portion of a transverse section of the sponge, showing the spicular structure, now 
replaced by calcite. Enlarged 20 diameters. 
Figs. 2—2 6.—Puarycnonta ELEGANS, Sollas. (Page 204.) 
Fig. 2.—A nearly complete specimen, growing attached to the surface of Oalathiseus variolatus, 
showing the reticulation of the upper surface of the wall. Natural size. From the Inferior Oolite, 
Parkinsoni-zone, at Burton Bradstock. (Collection G. J. Hinde.) 
Fig. 2 a.—Another specimen from the same locality, showing the under surface. (Collection Rev. 
G. F. Whidborne.) 
Fig. 2 6.—Portion of a transverse section, showing the spicular structure. Enlarged 50 diameters. 
Fig. 3.—PiarycHonta vaGans, Quenstedt, sp. (Page 205.) 
A small fragment of the spicular mesh of this species, showing the spicules in their original 
siliceous condition. Enlarged 50 diameters. Figured for comparison with the preceding. The sponge 
is from the Upper or White Jura of Streitberg, Germany. 
Figs. 4, 4a.—PtatycHonta Bropiet, Sollas. (Page 204.) 
Fig. 4.—The type-specimen. Natural size. From the Marlstone of the Middle Lias, Ilminster, 
Somerset. (Collection Rev. P. B. Brodie.) 
Fig. 4a.—A median section of the same, showing the thickness of the wall. This figure and the 
preceding are copied from the figures given by Sollas in ‘ Proc. Roy. Dubl. Soc.,’ N.S., vol. xli, pl. xxi. 
Figs. 5,5a.—PxiarycnHonia aFrinis, Hinde, sp. nov. (Page 205.) 
Fig. 5.—The type-specimen. Natural size. Inferior Oolite, Parkinsoni-zone, Burton Bradstock. 
(Collection G. J. Hinde.) 
Fig. 5a.—A portion of a transverse section, showing the spicular structure now replaced by 
calcite. Enlarged 20 diameters. 
Figs. 6, 6a.—Puatyenonia TENUIS, Hinde, sp. nov. (Page 205.) 
Fig. 6.—A convolute specimen. Natural size. The wall on the right of the specimen has been 
cut through to show its thickness. Inferior Oolite, Parkinsoni-zone, at Burton Bradstock. (Collection 
G. J. Hinde.) 
Fig. 6a.—A portion of a section, showing the spicular structure now replaced by calcite. 
Enlarged 50 diameters. 
