PLATE V. 



Carboniferous Trilobii'ks. 



Griffithidea {Phillijjsia) seoii/iiferus, Phillips, sp. 183G. P. 28. 



Fig. 1. — Intaglio of a nearly perfect specimen associated with a detached pygidium 

 and fragment of another specimen preserved in the same piece of matrix. Drawn of 

 natural size. 



Pig. 2 — Copy of a cast in relievo. Taken from Fig 1. 



Fig. 3. — Another specimen, also preserved in intaglio, showing glabeHa, without the 

 cheeks, and the nearly entire thorax and abdomen very well preserved. 



Fig. 4. — A specimen in relievo, nearly entire, although not very sharply preserved. 

 The glabella, which is partly removed, shows the hypostome (//) in sit it beneath. Fig. 7 

 shows the same hypostome enlarged. 



Fig. 5. — A group of probably four individuals, preserved in relief (with one pygi- 

 dium in intaglio) in the same piece of matrix. 



All the above are from the " Rottenstone band " in the Carboniferous Limestone of 

 Matlock, Derbyshire, and are preserved in the British Museum (\at. Hist.), Cromwell 

 Road. 



Fig. 6. — -Griffithides [Phillijjsin) sennniferus, Phil., sp. Outline restoration. Twice 

 natural size. 



Fig. 7. — The hypostome enlarged twice. 



Fig. 8 a, h. — One of the thoracic somites, a. Seen from above ; b, seen in section. 



Fig. 9. — The pygidium restored in outline and enlarged. 



