AUCH^OCTONUS. 



17 



from the same locality and horizon, and an entire tail from the Sandwell Park 

 Colliery, Birmingham, It is not nnlikely that the tail from Mansfield belonged to 

 an example of the same species as the owner of the chela, from the same locality ; 

 and this tail is strnctnrall}^ closely similar to the one from Birmingham. Dr. 

 Woodward, therefore, was perfectly jnstified in referring the three to the same 

 species. In this I propose to follow his example until evidence to the contrary is 

 forthcoming. Nevertheless, in view^ of the possibility of the chela and caudal 

 segments from Mansfield belonging to different species, perhaps to different genera, 

 it seems advisable to select one of the specimens as the type of the species. I 

 select, therefore, the chela, because the species may be distinguished at once from 

 all other Carboniferous Scorpions in which the chela is known, by the shape and 

 proportions of the segments of this appendage. 



Fig. 2. — Pala-omaehus anglir\ts (Woodward) ; copied from Quart. Jotirn. Geol. Soc, vol. xxxii, pi. viii. 

 a., chela from Mansfield ; h., five caudal segments from Mansfield ; c, entire tail from Sandwell Park. 



The only Carbonifei-ous Scorpion described with fingers as short as in P. 

 anglic'Hs is the type of Eohuflms rnjiovnieensis, Fritsch. Assuming that the figure 

 and description published by Fritsch are correct, P. anglicus cannot be assigned 

 to the genus Eohntlniii, because in the type species of the latter the hands are 

 much longer than the digits, and a little narrower than the brachium. 



Gemis ARCH-SIOCTONUS, nov 



1883. EoscGijiivs, Peach (iu part), Trans. Eoy. Soc. Ediub., vol. xxx, p. 398. 



Generic Characters. — Distinguishable, so far as is known, from all other genera 

 of Carboniferous, as Avell as of recent Scorpions, by the extreme shortness of the 

 legs, those of the fourth pair, when extended, not nearly attaining the posterior 

 extremity of the abdominal portion of the opisthosoma (pre-abdomen). The 

 individual segments of the legs are not very imequal in length, and the femur of 

 the fourth is much shorter than the carapace. The hand of the chela is small, 



3 



