122 PROF. GROOM ON THE CAMBRIAN AND [Feb.. 1902, 
Shales, and is now in the Malvern Museum. It agrees closely 
with Salter’s description, but is much smaller, and ae also in 
Fig. 29.—Dlatypeltis sp. 
of. Croft, Call. 
{Part of right-hand side and 
front of head, with labrum, 
x8 diam. From a spe- 
cimen in the Grindrod 
Collection, labelled ‘ Dictyo- 
nema-shales, Malvern.’ | 
the arrangement of the  glabellar 
furrows, which according to Salter 
are radiate. Salter’s specimens, how- 
ever, are much compressed, and but 
little confidence, therefore, can be 
placed in this character. 
PLATYPELTIs sp. ¢f. Crorti, Call. 
(Eie20=) 
Represented in the Grindrod Col- 
lection, University Museum, Oxford, 
by a free cheek, together with a portion 
of the rest of the head, including one 
eye and part ot the Jabrum. The 
margin of the head is broad and was 
evidently prolonged behind into a genal 
spine. ‘The eye is large, crescentic, and 
fucetted, and is sitiated near the front 
of the head. Externally to the eye, 
and separated from it by a well-marked 
eroove, is a rounded ridge, narrow in 
front, but broadening out behind. 
If, as Brégger suggests,’ the name 
Platypeltis, Gall., be reserved for a 
subgenus of Symphysurus, distinguished 
by the possession of genal horns, the 
form under consiiorarion probably be- 
longs to this subgenus. ‘The Malvern 
specimen is closely allied to, if not 
identical with, Platypeltis Croftiz, Call. 
It is, however, larger than any of the 
examples of the latter species seen by 
either of us. 
The specimen is labelled : Dapatee 
nema-shales (= Bronsil Shales), White- 
Leaved Oak.’ 
Nrose (Prycnocneitvs)? sp. (Fig.30.) 
Head unknown. 
Thorax.— Probable length and 
breadth, 4 and 7°5 mm. respectively. 
Portion of eight rings preserved. Axas 
well-defined, fairly convex, narrow, 
occupying about one-quarter of the 
total breadth, narrowing slightly be- 
hind. Pleure narrow, straight for the 
1 Nyt Mag. for Naturvidensk. vol. xxxvi (1898) pp. 220 & 221. 
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