240 BRITISH JURASSIC SPONGES. 
growth this species resembles L. inclusa, but it is much smaller, the fibres are 
coarser, and there is a great difference in the present structure of the skeleton 
fibres ; this difference, however, probably arises from the fact that in L. inelusa 
the fossilisation has obliterated the smaller spicules and produced the peculiar 
radiate crystallisation which now characterises them, whereas in this species they 
retain their normal features. 
Distribution.—Great Oolite. Hampton Cliffs, near Bath (Walton Coll., Wood- 
wardian Museum, Cambridge). Also from the well-boring at Richmond, Surrey, 
at a depth of 1205 feet beneath the surface. 
} Genus.—Ocutosponcta, Promentel. 
1859. Introduction 4 l’étude des Eponges fossiles, Mém. de la Soc. Linnéenne de Normandie, vol. xi, 
No. 2, p. 37. 
Syn.—Manon, (Goldfuss (in part); Oculispongia, Tremospongia, Roemer (in 
part); Sphecidion, Pomel. 
Sponges rounded, nodose, or club-shaped, massive; the summits with a few 
scattered circular oscules from which tubular canals or cloaca extend into the 
body of the sponge; the surface between the oscules with irregular pore-like 
apertures between the fibres. The base, and frequently the sides of the sponge 
as well, covered with a dermal layer. The fibres of the skeleton consist of 
three-rayed spicules in the central portions, with sinuous filiform spicules near 
the exterior. The type-species is Oculospongia Neocomiensis, Fromentel (‘ Intro- 
duction,’ p. 37, pl. 1, fig. 8), from the Lower Neocomian at Germigney. 
48. Ocunosponeia minuta, Hinde. Plate XIX, figs. 7—7 b. 
1884. OcuLosponata MinuTA, Hinde. Quart. Journ. Geol. Soc., vol. xl, p. 782, 
pl. xxxv, figs. 5, 5a. 
Sponges small, rounded, ovate, or nodose, from 5 to 10 mm. in diameter. 
Base flattened or concave, with wrinkled dermal layer which sometimes envelops 
the sides of the sponge, leaving only the upper surface free. The convex upper 
surface has irregularly scattered, subcircular, oscular apertures, from *5 to °75 mm. 
in width, and between these are the smaller irregular apertures, from ‘1 to *4 mm. 
in width, of the interstices of the fibres. The skeleton fibres are from ‘1 to 
