442 R. I. Pocock — On Eophrynus and Allied Arachnida. 



plate described above, there is, I think, no possibility of error, so 

 clearly defined is the sclerite. But concerning the smaller and 

 posterior sternal sclerite there is room for doubt. Assuming, as 

 I have assumed, that it is part of the sternal exoskeleton, its 

 distinctness from the anterior plate may be due to fracture and 

 subsequent displacement. But in the specimen before me, it 

 appears as a forwardly directed process from the inner edge of the 

 coxa of the adjacent appendage. Since no corresponding piece, 

 however, is traceable upon the better preserved coxa of the opposite 

 side, I have felt justified in assuming that it is not part of the 

 appendage, but part of the sternal area. 



Of the appendages of the first pair {mandibles, cTielicerce), that of 

 the left-hand side only is exposed. From the dorsal aspect traces of 

 two segments are to be seen projecting forwards from the anterior 

 end of the carapace, the proximal being noticeably longer than the 

 distal. From the ventral aspect there is visible a skeletal piece which, 

 from its position, appears to underlie the distal segment. It is 

 obliquely truncated in front and pointed behind, the pointed portion 

 being marked with a longitudinal groove which may represent the 

 divisional line between the two prongs of a pincer. The whole 

 structure, however, is too ill-defined to allow of any positive state- 

 ment on the question. So far as an opinion can be formed, however, 

 it appears to me evident that these appendages more nearly resembled 

 those of Opiliones than those of any other order of terrestrial 

 Arachnida. 



The appendages of the second pair (palpi) are remarkably long 

 as compared with those of the Opiliones Palpatores, which in 

 a general way they resemble. The femur is as long as that of the 

 third leg, and the tibia, which is very slender and unspined, is 

 almost as long as the femur and twice as long as the slender tarsus, 

 which bears a single claw. The joint between the patella and tibia 

 is indistinctly defined. The basal segments are crushed, but they 

 appear to meet in the middle line in front of the sternal area and 

 to be furnished with a large forwardly directed maxillary lobe. 



In the remaining appendages (the four pairs of legs) the coxae are 

 arranged at the sides of the sternal area, exhibiting a slightly radial 

 disposition. Judging by the narrow spaces separating the coxae on. 

 each side from one another, these segments were freely movable, 

 like those of the Araneee and Amblypygous Pedipalpi. The proximal 

 ends of the coxas of the first pair are inclined upon the margins of the 

 lanceolate anterior end of the sternum. 



Those of the fourth pair are considerably larger than the others, 

 diverge from each other at an angle of 90°, and almost meet in the 

 middle line behind the sternal area. Across the proximal end of 

 each and over the narrow triangular space between them runs 

 a distinct, apparently granular ridge, the significance of which I am 

 unable to interpret. 



So far as the rest of the segments are concerned, it is regrettable 

 that the tarsus and protarsus are preserved only in one instance, 

 namely, in the first leg of the left side. The segments are subequal 



