222 O. Harger—New Fossil Spider from the Coal Measures. 
spiders ; the two were, however, well separated, and doubtless 
by a more decided constriction than appears in the specimen, 
thus differing from the fossil genera Architarbus* and Hophry- 
nust and resembling Proto/ycosa. 
The palpi in this specimen must be considered as absent on 
both a 
’ 
trace of the long caudal stylet present in that genus. If the 
appendage in question be a palpus its size alone would point 
toward affinity with the lower arachnids (Solpugidae, Phrynus) ; 
if it be a leg, then the palpi were doubtless small as in most 
spiders, since little room is left for their articulation. 
The tubercle upon which the eyes were probably situated 
seems a character indicative of affinity with the lower arachnids, 
where, as especially among the Phalangide and scorpions such 
a structure 1s common, although it may occur among true spl 
ders, as in Lipistius. It is impossible to determine whether eyes 
existed upon other parts of the cephalothorax or not, and there 
is no reason for supposing their absence except such as may De 
drawn from the presence of an oculiferous tubercle. Unfortu- 
seems to have borne relations to the Phalangide and scorp! 
ons in its oculiferous tubercle, and to the latter group as well 
* 8, H. Scudder, Geol. Surv. Ilinois, vol. ifi, p. 568, fig. 4, 1868. 
+ H. Woodward, Geol. Mag., vol. viii, p. 385, pl. xi. London, Sept. 1871. 
