28 CATALOGUE OF TYPES AND FIGURED SPECIMENS 



Type. — An entire thorax and pygidium, but wanting the 

 head, the original of Woodward's Fig. 3 on pi. iii. From 

 the collection of J. Aitken, Esq., of Urmston, presented by 

 Professor Williamson. 



Clitheroe, Lanes. 



Carboniferous Limestone. Coll. Aitken. 



Griffitliides acanthiceps, H. Woodward, 1883-4. 



1883-4. Griffitliides acanthiceps, H. Woodward, Monogr. Brit. Carb. Tril., 



Palaeont. Soc, p. 32, pi. vi., figs. 2, 10, 

 and II ; pi. vii., figs. 2 and 3. 



Type. — An almost complete specimen, wanting only the 

 right free cheek and anterior border of the glabella. The 

 original of fig. 2 on pi. vii. From the collection of J. Aitken, 

 Esq., of Urmston, presented by Professor Williamson. 



Craco, Grassington, Yorks. 



Carboniferous Limestone. Coll. Aitken. 



MEROSTOMATA. 



Emypterus punctatus, Salter, 1859. 



1859. Eurypterus punctatus, Salter, Mem. Geol. Surv. Brit., Org. Rem., 

 Monogr. i, p. 99, pi. xiii., fig. 11. 



1872. „ „ Woodw., Brit. Foss. Merest., Palasont. Soc, 



p. 156. 



Type. — A large endognathary palpus, bearing two 



spinous processes. 



Whitcliff, Ludlow, Shropshire. 



Upper Ludlow. Coll Lighthody. 



Pterygotus Ludensis, Salter, 1859. 



1859. Pterygotus Ludensis, Salter, Mem. Geol. Surv. Brit., Org. Rem., 

 Monogr. i., p. 79, pi. xiv., figs. 7, 8. 



1872. „ „ Woodw., Brit. Foss. Merost., Palaeont. Soc, 



p. 76, pi. xvi., fig. 9, woodcut 15. 



Type. — The originals of the above-mentioned figures. 



(A) Basal joint of an ectognath, with short serrations 



(Fig. 8). 



Railway Cutting, Ludlow, Shropshire. 



Upper Ludlow or Transition Beds. 



