EURYPTERUS BRODIEI. 161 



puckered condition of the entire surface- The dorsal surface, which is exposed to view, 

 displays two eyes, placed 2^ lines apart, and two subcentral ocelli. 



Five pairs of appendages are preserved in situ : — 



First, a pair of simple cylindrical antennae (7 ?-jointed), 4 lines in length. 



Second, third, and fourth pairs alike, and about 9 lines in length ; seventh joint 

 unguiform. 



Swimming -feet, 1 inch in length ; third, fourth, and fifth joints small and somewhat 

 narrow ; sixth as broad as it is long ; seventh, nearly oval, with small terminal talon, and 

 united to the sixth joint by a small intercalated triangular plate. 



Body -segments. — No ornamentation is visible on these, save a quadrilinear series of 

 markings extending to the seventh segment, but bilinear markings are seen on the eighth 

 and ninth segments. First segment 6 lines in breadth and 1 line in length ; second seg- 

 ment 8 lines in breadth and 1 line in length ; third segment 9^ lines in breadth and 1 

 line in length; fourth segment 11 lines in breadth by 1^ line in length; fifth segment 

 11 lines in breadth by 2 lines in length ; sixth segment 11 lines in breadth by If line 

 in length ; seventh segment 10 lines in breadth by \\ line in length ; eighth segment 7 

 lines in breadth by 2 lines in length ; the border of this segment slopes rapidly inwards 

 posteriorly, and is arched laterally; ninth segment 3 iines in breadth and 2 lines in 

 length ; tenth segment 3 lines in breadth and 2 lines in length ; eleventh segment 2^ 

 lines in breadth and 2^ lines in length ; twelfth segment 2 lines in breadth and 2^ lines 

 in length ; telson broken, no doubt ensiform when properly preserved. 



The annexed woodcut (Fig. 52) restoration may serve to convey some idea of 

 this singular form of Eurypterid, which may possibly be a larval stage of E. scorpioides 

 already described (see PI. XXIX). 



Formation. — Uppermost Ludlow Rock (Upper Silurian). 



Locality. — Lesmahagow, Lanarkshire. 



The specimens are preserved in the British Museum. 



Species 12.— EURYPTERUS BRODIEI :— H. Woodward. 



Eurypterus Brodiei, H. Woodward. Quart. Journ. Geol. Soc, 1871, vol. xxvii, 



p. 261. 



— — H.Woodward. Trans. Woolhope Club, 1871. 



— — H. Woodward, Brit. Assoc. Report, Section C, Liverpool, 1870, 



p. 91. 



In March, 1869, the Rev. P. B. Brodie, F.G.S., communicated to the Geological 

 Society a short account of the occurrence of remains of Eurypterus and Pterygotus at Purton 



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