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OOLITIC OPHIURIDiE. 
ADDENDA. 
Species of the Genus Ophiolepis. 
A. Species from the Inferior Oolite. 
Ophiolepis Leckenbyi, Wright, n. sp. PL XIX, fig. 3 a, h. 
Disk small, covered with ten pear-shaped radial scales, arranged in pairs at the 
base of the rays. The converging apices of the scales appear to have left a small 
space in the centre of the disk, the integument of which is absent. Arms moderately 
long, and stoutly built of rings of imbricated scales, arranged in a chain-shaped style of 
grouping ; the lower surface of the arm-scales have a supplementary piece inserted at 
the heart-shaped angle formed at the junction of the lateral scales of each arm along the 
mesial line. Arms tapering very gently towards the termination. 
Dimensions. — Diameter of the disk four tenths of an inch; length of the rays one 
inch and three tenths. 
Description. — This beautiful little Brittle-star was collected by the late Peter Cullen 
from the Grey Limestone near Scarborough. It was kindly communicated to me by 
my old much-esteemed friend the late lamented John Leckenby, Esq., F.G.S., to whose 
memory I dedicate the species. As the Leckenby collection now forms part of the 
Woodwardian Museum, Cambridge, the type-specimens will be found there. The 
example before me is rather smaller than the type figured in PI. XIX, fig 3 a, b, of the 
natural size. 
The small disk was covered above with ten radial, pear-shaped scales, grouped in 
pairs, and placed over the base of the rays. They must have covered the greater portion 
of the disk ; unfortunately the central part is absent, and the only other specimen which 
I possess lies upon its upper surface, and displays only the under side. 
The rays were flat, moderately long, flexed, and tapering very gently from their discal 
