24 TERRESTRIAL CARBONIFEROUS ARACHNIDA. 



the species in acknowledgment of his kindness in sending it to me for 

 description. 



The type of this species approaches twice the length of the type specimen of 

 A. sparthensis. It also differs in its proportions, the tail being longer and the 

 maims of the chela narrower. In A. sparthensis, for instance, the first four segments 

 of the tail only exceed twice the length of the carapace by about one-third of its 

 length, the carapace being approximately as long as the first and second segments 

 together, whereas in A. dunlopi the first four caudal segments exceed twice the length 

 of the carapace by at least half its length, and the carapace is distinctly shorter than 

 the first two caudal segments so far as can be judged. In A. sparthensis, again, 

 the width of the mantis is nearly half the length of the movable digit, while in A. 

 dunlopi it is rather less than one-third of the length. The smaller size of the 

 example of A. sparthensis, coupled with the shorter tail, might be attributed to 

 immaturity, were it not that the two known examples of this species are approxi- 

 mately equal in size and have all the appearances, judging from the firmness of 

 the exoskeleton, of being adult. Moreover, the hands of the chela? in young 

 Scorpions are relatively narrower than in full-grown examples. Hence their 

 greater relative width in A. sparthensis as compared with A. dunlopi is quite 

 irreconcilable with the conclusion that the former specific name has been assigned 

 to young examples of the latter species. For these reasons I have not hesitated to 

 describe Mr. Dunlop's specimen as an example of a distinct species. This 

 specimen was for some time in the possession of Dr. Peach, who made a drawing 

 of it in close agreement with my own restoration. This drawing, accompanied by 

 a short account, was published by Mr. Dunlop in the Annals of the Glenfield 

 Rambler, No. 2, pp. GO — 64, 1898, but no name appears to have been assigned 

 to the specimen. 



Anthracoscorpio buthiformis, sp. nov. Plate I, fig. 2 ; Plate II, fig. 1 ; Text- 

 figures G — 8. 



Dorsal integument finely and closely granular ; neither the carapace nor the 

 first six terga of the opisthosoma visibly keeled. Carapace about as long as its 

 posterior width, its length a little exceeding that of the first and second caudal 

 segments together, and about equal to that of the second and third, and to the fifth 

 and half the fourth. The ocular tubercle in the middle of its anterior half; 

 a shallow median longitudinal groove running from it posteriorly and expanding 

 and deepening just before the posterior border ; the anterior border of the carapace 

 apparently slightly convex, perhaps with a small median excrescence ; the posterior 

 border slightly convex in the middle. Terga of the abdominal portion of the 

 opisthosoma showing the anterior elevated rim, this region, thus distended, 

 a little more than twice the length of the carapace. Tail, when complete, no 



