Page:Quarterly Journal of the Geological Society of London, vol. 28.djvu/180

146 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Jan. 24, Note. — Among the microscopic fossils are two which require notice from their liability to be taken for Foraminifera : — 1. Some hook- shaped spicules ending generally in a complete circle at one end. They are described by Terquem as Foraminifera, under the name of Uncinulina polymorpha, in his ' Mem. sur les Foram. du Lias,' but have since been recognized by him as spicules of Astrophyton (Saccocoma), Terq. & Jourdy, Et. Bathon. de la Moselle, pl. 15. fig. 12-14. 2. Some joints of a Crinoid (?), thin and flat, and perforated with numerous large openings disposed in a subcruciform manner, resembling the cut section of a Nubecularia.

Appendix. On some Bivalve Entomostraca from the Lias (" Infra-LiAs") of Yorkshire. By Prof. T. Rupert Jones, F.G.S.

1. Bairdia(?) ellipsoidea, G. S. Brady, MS.

Carapace ovato-trigonal; somewhat compressed ; highest (broadest) in the anterior third. Valves smooth, thick ; right valve the largest, overlapping the other on the dorsal and ventral borders, and marked with a furrow within each of those edges for the reception of the fellow valve. Length 1/48 inch. Four specimens.

This somewhat resembles Bairdia ovata, Bosquet, sp. ('Mem. Commission descr. Carte Geol. Neerlande,' vol. ii. p. 73, pl. 5. fig. 6), and probably belongs rather to Pontocypris than to Bairdia, both of which are marine members of the family Cypridoe. See G. S. Brady's " Monograph of the Recent British Ostracoda," Linn. Trans. vol. xxvi. p. 360, &c.

2. CYTHERE MooREi, G. S. Brady, MS.

Carapace tumid; egg-shaped, with terminal lips and flattened ventral surface ; somewhat like a peach-stone in shape and ornament. Surface of the valves reticulate ; the meshes rather coarse on the middle, but having a tendency to become longitudinal and parallel on the sides and towards the extremities.

Length 1/32 inch. Three specimens.

In general form this approaches C. striatopunctata (Romer) and C. concentrica (Reuss); but the reticulation differs. It takes its name after Mr. Charles Moore, F.G.S., one of the most enthusiastic of geologists, and a successful labourer among Lias fossils.

3. Cythere Blakei, sp. nov.

Carapace oblong, subcylindrical, with marginal lips at the ends, obliquely rounded in front, contracted and rounded behind, somewhat compressed dorsally at the median third. Surface rough, with faint irregular reticulation, and bearing traces of ventral striae.

Length 1/48 inch. Three specimens.

Cythere clathrata, Reuss, and its allies have this form of carapace ; but the details are distinct. The name of its discoverer, the Rev. J. F. Blake, F.G.S., distinguishes this species.