118 Proceedings of the Royal Physical Society. 



large double segments, shows portions of four joints, measur- 

 ing in all about 14 mm. in length (Fig. I''). Counting from 

 the body outwards, these represent the third, fourth, fifth, 

 and part of the sixth joint, measuring respectively 5, 4, 4, 

 and 1 mm. in length. They are somewhat flattened laterally 

 by pressure, and in their present state the third joint is 

 1 mm. broad at its proximal and 2 mm. at its distal end, 

 near to its articulation with the fourth joint. Some detached, 

 short, thick, triangular joints occur, and are in all probability 

 coxal joints, one of which measures 1'75 mm. in breadth. 

 Another detached portion shows a sixth joint, with the 

 attached; single claw (Fig. l^). Four flattened legs lie side by 

 side. These, which appear to belong to segments nearer the 

 head than the limb above described, show parts of the fourth, 

 the whole of the fifth, and part of the sixth joints. Three of 

 these together measure 3 mm. across their fifth joints. All 

 these joints, as well as the corresponding joints in the limb 

 first described, are more or less pitted, showing that the 

 limbs, especially towards their extremities, were more or less 

 supplied with hair-like spines, as in the recent lulus. By 

 piecing together the evidence supplied by these scattered 

 joints, it is apparent that the species under consideration 

 was supplied with limbs, each of which was quite as long, or 

 even longer, than the width of the segment to which it was 

 attached ; and if, as it is natural to infer, the sternal plates 

 were correspondingly wide, as they have been shown to be 

 in other described members of the family Euphoberidae, the 

 legs, when in use for progression, must have extended far 

 beyond the edges of the body. For this reason, and from 

 the fact that the articular facet at the anterior edge of each 

 segment is very narrow, it is highly improbable that this 

 species had the power of rolling up its body and protecting 

 its legs in the manner adopted by the recent lulus. 



I have named the genus after Mr Patton, and the species 

 after Mr Coutts, of whose labours we are still reaping the 

 fruits. 



Locality. — East Kilbride, Lanarkshire. 



Formation. — Carboniferous Limestone. 



Collector. — Patton , 



