EUDEA WALFORDI. 241 
-25 mm. in thickness ; the rays of the larger three-rayed spicules reach to °17 mm. 
in length by ‘035 mm. in thickness. 
The small sponges included in this species have their oscules and cloacal tubes 
less prominently developed than in the more typical species of the genus, but 
they agree better with the characters of Oculospongia than with those of any 
other genus. 
Distribution.—Inferior Oolite. Parkinsoni-zone at Shipton Gorge, Dorset. 
(Coll. Mr. E. A. Walford.) Also in the Jurassic beds in the well-boring at 
Richmond, Surrey, at 1205 feet beneath the surface. 
Genus.—EHupra, Lamouroun. 
1821. Exposition méthodique des genres de l’ordre des Polypiers, p. 46. 
Syn.—Verrucospongia, d’Orbigny (in part); Epeudea, Ependea, Stegendea, 
Fromentel; Spongites, Orispongia, Quenstedt; Solenolmia, Verrucospongia, 
Elasmeudea, Pomel. 
Sponges simple or rarely branching; subcylindrical, club-shaped, conical or 
rounded, with a tubular cloacal cavity opening at the summit and reaching nearly 
to the base of the sponge. The surface of the sponge, with the exception in 
some cases of the summit portion, is covered with a thickened dermal layer in 
which at irregular intervals there are circular or ovate apertures, usually with 
prominent margins, which open directly into the interspaces between the sponge- 
fibres. No special canal system beyond that in the interspaces of the fibres. 
The spicular structure of the fibres very indistinctly shown ; three-rayed spicules 
are present in the central portions of the fibre, and in some instances simple 
rod-like spicules as well. 
The type-species is Hudea clavata, Lamx., from the Terrain a Polypiers, near 
Caen (‘ Exposition méthodique,’ p. 46, pl. lxxiv, figs. 1—4). 
49. Hupea Watrorpi, Hinde, sp. nov. Plate XIX, figs. 1—1c. 
Sponges small, simple, subglobular to subcylindrical, attached by a flattened 
or concave base, the summits truncate or gently rounded, with a central or 
subcentral oscule about 1 mm. wide with slightly projecting margin. The outer 
surface usually entirely covered with the dermal layer, but sometimes the summit 
portion is free and exhibits the fibres. The apertures in the dermal layer are 
