222 BRITISH JURASSIC SPONGES. 
to'16 mm.in width. In many respects this species is similar to O. lycoperdioides ; 
it is, however, a smaller form, and very frequently compound in its mode of growth. 
Distribution —Great Oolite, Hampton Cliffs, near Bath. (Walton Collection, 
in the Woodwardian Museum, Cambridge.) 
30. CoryNELLa PpuNcTATA, Hinde, sp.nov. Plate XVI, figs. 3—3 c. 
Sponges simple or in small colonies ; the simple individuals are subcylindrical, 
occasionally nodose, the basal portion usually expanded. In the colonies the 
spongites are short and frequently amalgamated together to near their summits. 
A well-marked, compact dermal layer encloses the base and sometimes extends half- 
way to the summit of the sponge. The oscule is circular, and from 1 mm. to 1:25 mm. 
in width. The surface of the sponge when not covered by the dermal layer is 
dotted over by ostial apertures of irregular form, sometimes elongate or sub- 
stellate, bounded by a very delicate spicular mesh (Pl. XVI, fig. 3c). Smaller 
pore-like interspaces are present as well as ostia. The cloacal tube is of the same 
width for at least one-half the length of the sponge. The spicular fibres are 
delicate, ranging from ‘07 mm. to ‘14 mm. in thickness; the rays of the axial 
spicules are -2 mm. in length by ‘04 mm.inthickness. This species appears to be 
rare ; of the four specimens examined the largest simple form is 20 mm. in length 
by 11 mm. in diameter, whilst a colony of three individuals is 14 mm. in height by 
16 mm. in breadth. The characters of the surface serve to distinguish this species 
from the preceding. 
Distribution.—Inferior Oolite. Oolite-Marl, Murchisonx-zone at Ravensgate 
Hill, near Cheltenham, and Birdlip Hill, Gloucester. (Collected by Mr. R. F. 
Tomes.) 
31. Corynetia Lanetonensis, Hinde, sp. nov. Plate XVI, figs. 2, 2a. 
Short subcylindrical sponges, growing directly attached to a shell or some 
other organism. Length from 20 mm. to 28 mm.; thickness from 18 mm. to 
27mm. Summits gently rounded, the oscular aperture about 6 mm. in breadth ; 
from its rim narrow open furrows, about °5 mm. wide, extend down the sides. 
The outer surface has numerous irregularly disposed ostia from*5 mm. to ‘75 mm. 
in breadth. The fibres, as seen in transverse section, are from ‘(05 mm. to*18 mm. 
in thickness; they resemble in structure the fibres of C. lycoperdioides, but I have 
