146 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Jail. 24, 



J^ote. — Among the microscopic fossils are two which require notice 

 from their liability to be talcen for Foraminifera : — J . 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 polymorpJia,ra 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, pi. 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 jSiihecidaria. 



Appendix. On some Bivalve Entomostraca from the Lias (" Inpra- 

 LiAs") o/ 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. Yalves 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 ^L- inch. Four specimens. 



This somewhat resembles Bairdia ovata, Bosquet, sp. ('Mem. 

 Commission descr. Carte Geol. Neerlande,' vol. ii. p. 73, pi. 5. fig. 6), 

 and probably belongs rather to Pontocypris than to Bairdia, both of 

 which are marine members of the family Cypridce. See G. S. 

 Brady's " Monograph of the Recent British Ostracoda," Linn. Trans. 

 vol. xxvi. p. 360, &c. 



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



■ Carapace tumid; egg-shaped, with terminal lips and flattened 

 ventral surface ; somewhat like a peach-stone in shape and orna- 

 ment. 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 -g-V inch. Three specimens. 



In general form this approaches C. striatopunciata (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, some- 

 what compressed dorsally at the median third. Surface rough, with 

 faint irregular reticulation, and bearing traces of ventral striae. 



Length J-g- inch. Three specimens. 



Cythere dathrata, 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. 



