244 BRITISH FOSSIL CRUSTACEA. 



I have named this species after Mr. Charles Konig, the original founder of the genus, 

 and for many years the Keeper of the Geological and Mineralogical Collections iii the 

 British Museum. The original specimen is preserved in the British Museum, and was 

 obtained by C. Ketley, Esq. 



Locality. — From the Clay Iron-stone of the Coal-measures, Dudley Coal-field. 



Genus 3. — Prestwichia, H. Woodward. 1867. 



Limulus, Prestwick, 1840. Trans. Geol. Soc, 2nd ser., vol. v. 



Bellinurus, Baily, 1863. Ann. and Mag. Nat. Hist., 3rd series, vol. xi, p. 113. 



Prestwichia, H. Woodw., 1867. Quart. Journ. Geol. Soc, vol. xxiii, p. 32. 



This genus was proposed by me, in November, I860, to include certain forms, first 

 noticed by Professor Prestwich from the Coal-measures of Coalbrook Dale, found in 

 nodules of clay- ironstone (called " pennystone "), which have long been known to yield 

 organic remains, such as the cones of Lepidodendron (Lepidostrobi), the leaves of 

 Alethopteris, Neuropteris, and Cyclopteris, and more rarely the remains of Arachnida 

 {Etophrynus Prestvicii), and Crustacea. 



Gen. Char. — Limuli having a more or less elliptical head-shield, bearing the eyes 

 upon the lateral margins of the glabella ; the lateral borders developed into genal spines ; 

 the thoracico-abdominal series being apparently united together into one buckler to 

 which the short telson was articulated : central axis of body-segments narrow. 



Distribution. — Coal-measures, Airdrie ; Padiham, Lancashire ; Coalbrook Dale, Shrop- 

 shire ; Dudley ; Nottingham. 



Species 1.— PRESTWICHIA ANTHRAX, H. Woodw. PI. XXXI, figs. 6 and 6 a. 



Limulus anthrax, Prestwich, 1840. Trans. Geol. Soc, 2nd ser., vol. v, pi. xli, 



figs. 1—4. 

 Bellinurus anthrax, Baily, 1863. Ann. and Mag. Nat. Hist., 3rd ser., vol. xi, 



p. 113. 

 Prestwichia anthrax,//. Woodw., 1867. Quart. Journ. Geol. Soc, vol. xxiii, p. 32» 



pi. i, fig. 2. 



This characteristic species well illustrates the coalescence of the segments of the 

 posterior buckler, which peculiarity I ventured to suggest as a distinguishing mark between 

 the Bellinuri and the Prestwichia. Whilst fully admitting that a knowledge of the 

 complete animal (which, unfortunately, we do not possess), might materially tend to 

 modify our classification of these ancient King-crabs, yet, nevertheless, the palaeontologist 



