LOWER-CARBONIFEROUS CRUSTACEAN. 227 



scale-like sculpture covering some portions of American species, and 

 adds that " the texture appears to have been elastic or leathery, and 

 the substance very thin." These remarks equally apply to the 

 present examples. 



A due consideration of the foregoing facts has led me to the con- 

 clusion that the large bluntly pointed spines of the above specimens 

 represent those on the posterior dorsal border of the abdominal or 

 body-segments of E. Scouleri, of which Mr. Woodward has given 

 an enlarged figure in his Monograph on the Fossil Crustacea * ; but 

 in the present instance we also have spines of an intermediate size. 

 The narrow, acutely pointed spine-like squamae which succeed and 

 partially overlap these large spines, most nearly approach those seen 

 on the head-shield and two anterior segments of E. Seoulerif. The 

 scale-like squamae are larger than those of the latter, although 

 evidently constructed after the same plan, and are much closer 

 together ; I also suspect that there is a tendency to imbricate from 

 before backwards. From whatever point of view we look at the 

 elongated and compressed specimen above referred to, either as an 

 abdominal segment bent down along the median line, or as one of 

 the terminal and consequently narrower segments near the telson, 

 or as a segment of one of the smaller appendages, we can arrive at 

 only one conclusion — namely, that it formed part of an animal far 

 larger than, and, in all probability, of very different form from 

 E. Scolder i. If fig. 3, represented on the twenty-sixth plate of 

 Mr. Woodward's monograph, is an enlarged view of a portion of 

 E. Scouleri, what must have been the size of the individual or 

 individuals of which the present fragments are the remains ? 



Should further discoveries bear out the view here advocated, 

 that these specimens represent a form specifically distinct from 

 E. Scouleri, Hibbert, I would suggest that the name of the gentle- 

 man, Mr. Stevenson, to whom the Survey is indebted for the pre- 

 sentation of specimens to its collection, and who first brought 

 them under my notice, should be assigned to them, and name the 

 species Euryptsrus ? Sttvensoni. At the same time I also heartily 

 beg to thank Mr. Smith for the loan of his valuable specimens, and 

 Mr. Macconochie, through whom they were placed in my hands. 



3. Locality and Horizon. — Kimmerghame Quarry, Blackadder 

 Water, near Dunse, Berwickshire; in a light-coloured micaceous 

 sandstone of the Cement-stone group, Lower Carboniferous, or 

 Calciferous Sandstone series. 



4. A reference has been made to the exhibition, by Professor Page, 

 LL.D., F.Gr.S., at a meeting of the Edinburgh Geological Society, of 

 fragments of a Eurypterus, also obtained by Mr. Stevenson in Ber- 

 wickshire. Prof. Page was kind enough to inform me that he gave 

 these specimens to Mr. J. Powrie, F.G.S., of Reswallie, Forfar-, 

 shire, to whose courtesy I am indebted for the loan of two 

 of them. Their resemblance to the previously described spe- 

 cimens is at once apparent. One of them corresponds remarkably 



* Op. cit. pi. 25. fig. 3. 



t Ibid. pi. 26. figs. 1 a and b, and pi. 27. 



<*2 



