32 Dr. T. Wright on new Species of Echinodermata 
Locality and stratigraphical range-—We collected this rare 
form of Pedina from the Pea-grit of Crickley Hill, and have seen 
fragments of its test in the same bed at Leckhampton, but 
never in any other locality. 
We dedicate this species to our friend T. Barwick L. Baker, 
Esq., of Hardwicke Court, the President of the Cotteswold Natu- 
ralists’ Club, for the warm interest he takes in the progress of 
the Paleontology of Gloucestershire. 
Pedina Etheridgii, Wright. PI. I. fig. 5, a—d. 
Test circular, depressed ; ambulacral areas with from six to eight 
small perforate tubercles at their base, and a double row of 
small granules on their upper surface; the interambulacral 
areas with primary tubercles only, the areolas of which are 
surrounded with regular circles of granules; pedal pores not. 
numerous, arranged in nearly a single file with a slight ele- 
vation between the two pores of each pair; apical disc large ; 
ovarial plates leaf-like ; mouth-opening small. 
Height ;3,ths of an inch, transverse diameter 2ths of an inch. 
Description.—This pretty little Urchin has a circular outline 
in the young state, which in larger specimens inclines towards a 
pentagonal form; the base is flattened, and the upper surface of 
the test is much depressed. The ambulacral areas are narrow, 
and have from six to eight small perforated tubercles at their 
base, and a double row of from twelve to fourteen minute imper- 
forate granules in each row on their upper surface, which in 
figure and size resemble those covering the other parts of the 
test ; between the pedal pores of each pair is a small elevation ; 
these collectively form a prominent moniliform line which ex- 
tends from the margin of the disc to the mouth-opening; the 
pores are disposed in nearly a single file, and do not form the 
triple oblique pairs which we observe in the larger Pedine. The 
interambulacral areas are about twice the width of the ambu- 
lacra ; the rows of primary tubercles occupying the centre of the 
plates have seven tubercles in each row, they are small in size 
and are rendered prominent from being raised upon uncrenu- 
lated mammillary eminences, the bases of which are sharply de- 
fined and surrounded by complete circles of moderately sized and 
regularly arranged granules; the regular disposition of these 
granulations gives an air of decoration to this little species not 
observed among other congeneric forms; the entire absence of 
secondary tubercles from the areas renders the decoration more 
complete. The apical disc is large ; the ovarial plates are widely 
rhomboidal, the oculars are small and heart-shaped, and the sur- 
