386 Dr. Henry Woodward — Coal-Measure Crustaceans 



is shorter than the dorsal and slightly emarginated behind the base of 

 the antennse. About one-fifth of the head is strongly marked off 

 behind by the cervical furrovr or groove which runs parallel to its 

 posterior border, or it may represent the union of the first thoracic 

 segment coalesced with the cephalon. 



Fig. !•. — Praanaspides prmcursor, H. "Woodw., geu. et sp. aov. (Clay-ironstone) 

 Coal-measures : Ilkeston, Derbyshire. From Dr. L. Moysey's collection. 

 About twice nat. size. 



Eyes. — The presence of a pedunculated eye seems indicated — though 

 not very clearly — by a small rounded hollow at the base of the 

 antennule. 



"^=^ 



Fig. 2. — Prceanaspides preecursor, H. Woodw.; dorsal aspect. Coal-measures: 



Ilkeston, Derbyshire. Enlarged one-fifth nat. size. 

 Fig. 3. — Prceanaspides precursor, H. Woodw., gen. et sp. nov. Coal-measures: 



Ilkeston, Derbyshire. Collected by Rev. C. Hinscliff, M.A., and presented by 



him to the Geological Department of the British Museum (Natural History}. 



X 2| nat. size. 



