LOWER-CARBONIFEROUS CRUSTACEAN. 225 



rings of E. Scouleri*. The following are the measurements of this 

 specimen (approximately) : — 



in. lin. 



Length . . 1 7 



Breadth 1 11 



Length of central spine 1 2 



In another specimen (fig. 2) there are five spines of nearly 

 equal size, although smaller than in the preceding (with perhaps 

 indications along each lateral margin of another indistinctly pre- 

 served spine), separated as in the former case by other narrower 



Fig. 2. — Eurypterus (?) Stevensoni, 



•Spines and scales. From Kirmuerghame Quarry, near Dunse. In the 

 collection of Mr. Smith, Preston Farm, near Dunse. 



spines. Similarly, the spines are overlain by narrow spine-like 

 squamae, which gradually, towards the anterior edge, become flat 

 (and partially imbricating?) scale-like squamae, approaching in form 

 and appearance those on the abdominal somites of E. Scouleri, but 

 of far larger size. The measurements of this specimen are : — 



in. lin. 



Length 1 2\ 



Breadth 1 3 



Length of spines (about) 7 



Size of scale-like squama?, 1 to 1| line square. 



One of the specimens collected by Mr. Macconochie consists of a 

 few of these detached squama?, one or two measuring four by three 

 lines. Of specimens resembling this there are in the collection 

 several examples. They all, I think (although the outline of each 

 is more or less different, owing to its fragmentary condition), repre- 

 sent portions of the general surface of a body-segment f, with the 



* Op. cit. pi. 25. figs. 1 a and b, and pi. 27. 



t Or, on second thoughts, fragments of some very large jawfoot (7). 



Q. J. G. S. Xo. 130. q 



