26 



TERRESTRIAL CARBONIFEROUS ARACHNIDA. 



In addition to this specimen I have seen several examples from Dudley, 

 which, in the absence of satisfactory proof of their distinctness from each other and 

 from the type, I provisionally refer to this species. With the exception of one 

 small specimen, which is immature if conspecific with the rest, I judge these 

 specimens to be mature from the apparent thickness of the exoskeleton. The 

 species therefore differs from A. spartltensis by its much smaller size. In the 

 type specimen also the tail is shorter, the carapace being half the length of the 

 first four caudal segments, whereas in A. sparthensis, as testified by the type, the 

 carapace is less than half that length. 



I subjoin the following notes on the examples from the Dudley Coalfield : 

 (1) Specimen in Mr. Madeley's Collection showing the chela?, the trochanters, 

 femora, and part of the patellae of the leg of the first, second, and third pairs, the 



Fig. 7. — Anthracoscorpio buthiformis, sp. n. ; about 

 three times nat. size. — Coal Measures ; Coseley, 

 near Dudley. W. Madeley Collection. 



FlO. 8. — Anthracoscorpio buthiformis, sp. n. ; three 

 times nat. size. — Coal Measures ; Coseley, near 

 Dudley. Wheelton Hind Collection. 



greater part of the carapace, of which only the anterior portion is missing, and, 

 following the carapace, a thin strip representing the first tergal plate of the 

 opisthosoma. Behind the latter there lie, displaced to one side, the fourth, fifth, 

 sixth, and seventh terga of the opisthosoma, which resemble in a general way the 

 corresponding plates of Dr. Hind's specimen (No. 2). The carapace exhibits traces 

 of the median ocular tubercle in front of its middle, but some distance from its 

 anterior edge. The chelge are slender, and recall those of some existing members 

 of the Buthidaa, the " maims " being narrow, although wider than the brachium ; 

 the digits are long and slender, and apparently in contact throughout their length, 

 the movable digit being a little more than twice the length of the back of the hand. 



■Approximate measurements in mm. — Width of carapace 3 - 5, of opisthosoma 4 ; 

 length of humerus + brachium of chela 6, of manus + digits 5. 



(2) Specimen in Dr. Wheelton Hind's Collection, showing the dorsal surface of 

 the posterior part of the carapace, seven tergal plates and the first and second 



