Vol. 58. | ASSOCIATED BEDS OF THE MALVERN HILLs. 123 
whole of the length seen, flat ; with grooves starting at the axis and 
running straight towards the ends of the pleure, which are not. 
preserved. 
Pygidium.—Relatively large, semi-elliptical, shorter than the 
thorax ; probable length and breadth, 3°5 and 6-7 mm. respectively ; 
Fig. 30.—Niobe (?) sp. Leternal cast of part of the pygidium and 
thorax. (x8 diam.) 
{From a specimen in dark-grey shale, labelled ‘Malvern,’ in the University 
“Museum at Oxford. Probably obtained from the Bronsil Shales, Southern 
Malverns. | 
composed of more than five segments. Axis well-defined, fairly 
convex, narrow, tapering towards the posterior margin, which 
probably it nearly reaches: anterior part of axis clearly segmented 
into four rings; posterior part segmented indistinctly im front, but 
not behind. Limb gently convex; margin fairly broad, faintly 
striated, marked off from the rest of the limb by a faint 
depression. Five ribs present in front, the most anterior of which 
are the strongest, and just reach the marginal rim; hinder part 
of limb not distinctly segmented. 
This small fossil is represented in the Oxford Collection by a 
single external cast in dark shale, labelled ‘ Malvern’; it probably 
came from a dark band in the Dictyonema-shales.’ 
The general characters are those of the species of ‘ Ogygia’ found 
in the Arenig and Tremadoc Beds of Wales, such as Ogygia peltata, 
1 This specimen, after being drawn, was unfortunately broken in two during 
transit, and one portion was lost. 
