ANTHRACOSCORPIO. 23 



sense denticulated ; the supero-lateral crests are similarly granular, and granules 

 are irregularly scattered over the areas between the crests. 



The chelicerfe are not well preserved, no details of the dentition being 

 decipherable ; but the movable digit appears to be strongly arcuate. 



The chelae are long and slender, somewhat recalling those of Gliflifer cancroides. 

 The humerus and brachium are subequal in length, and both, broadly speaking, 

 about four times as long as wide. No trace of crests or granulation is preserved. 

 The manus is slender and oval, its width being a little greater than that of the 

 brachium, and little more than half the length of the ])ack of the manus. The 

 digits are slender, normally arcuate, the movaljle being about as long as the 

 carapace, l)rachium, or humerus. 



Portions of all the legs are preserved, showing the normal structure. Evidence 

 for the existence of til^ial spurs is to be found on the fourth and fifth legs, as in 

 many genera of existing Buthidre ; l)ut there also appears to be one on the first leg 

 — a character not present in any recent species of the order. On the second 

 leg of one side a pedal spur is also preserved. The femora, patellre, tibiae and 

 protarsi are crested, and the femora at least are beaded with grannies along their 

 upper and lower edges. The claws are not preserved. 



Approximate Measurements in mm. of Type Specimen. 



Length of carapace 



20? 









abdomen 



caudal segments 1 to 4 . 



40 

 50 









entire tail probably not less than 

 entire animal ,, 



70 

 180 









first caudal segment 



10-.5 



; width of same 



11 





second ,, ,, 



13; 



j> j> 



10-5 





third „ „ . . 



13; 



)» >j 



10 





fourth ,, 



13; 



,, ,, 



10 





humerus 



21 









brachium 



20; 



width of bracliium . 



5 





back of the hand 



9; 



of hand 



6 





movable digit 



20 







In the above-given table the probable total length of the tail has been guessed 

 from the leno^th of the fourth segment, 20 mm. beino- allowed for the fifth 

 segment and the vesicle, which are not preserved. These two missing segments 

 were probably not less, and may have been more than the amount supposed, since 

 the fifth caudal segment is never shorter and is usually longer than the fourth in 

 living Scorpions. 



The type and only known specimen of this species is contained on the two 

 pieces of a split shale from the Upper Coal Measures of Druingray, near Airdrie, 

 in Scotland. It is in the possession of Mr. R. Dunlop, to whom I have dedicated 



