8 Br. R. Woodward — Myriapods of the Coal Period. 



breadth and 6 mm. in length, and one of the anterior segments 

 12 mm. in breadth and 5 mm. in length. 



Another specimen (not drawn) exposes seven body-somites in 

 juxtaposition ; the spines are wanting, save one perfect dorsal spine, 

 which is seen attached to the seventh somite, and measures 5 mm. in 

 height. The margin of the tergum of each somite is seen along 

 the right side, and is rather more rounded behind and slightly pointed 

 in front. (See PI. I. Fig. 13, ep.) 



The left side is buried in the nodule for about one-third of the 

 surface of the terga. The seven somites together measure 50 mm. 

 long, giving an average length of 7 mm. to each ; but the somites are 

 rather more widely separated than usual, so that probably 6 mm. each 

 would be more correct. 



Another (Plate I. Fig. 6), from Mr. Beale's collection, exposes 

 five somites, one side displaying the large unequally branched spines, 

 and the small simple antero-lateral spines at their bases, with 

 a trace only of the small latero-posterior spine. On the other side 

 the spines are broken off, showing their hollow shafts, and displaying 

 the lateral border of the tergum of each segment, which is minutely 

 serrated posteriorly. From these specimens I infer that these large 

 spined Myriapods were less round in section than Scudder represents, 

 and that the epimeral portion of each somite projected slightly 

 outwards above its sternum. Length of five somites 35 mm., 

 or averaging 7 mm. each ; breadth 18 mm. (exclusive of spines, 

 which would project 9 or 10 mm. beyond this on each side). 



This specimen represents a part of the largest example known in 

 England, being 2 mm. wider than Salter's E. ferox in the Jermyn 

 Street Museum ; but the length would be about the same. In Mr. 

 Beale's specimen the somites are lying in one plane; in Salter's 

 type they are highly curved, and the elevated ridge of each somite 

 has been slightly broken away along its posterior dorsal line. By 

 a misadventure, Figs. 6 and 7, Plate I. have both been drawn with 

 the anterior extremities downwards, the other specimens being all 

 drawn in the contrary direction, with the anterior end upwards. 



Perhaps the most instructive specimen in the entire series is one 

 from the late Mr. Henry Johnson's collection, from Coseley, dis- 

 playing seventeen segments of one individual in the same nodule. 

 The seven anterior somites exhibit their terga and also their branched 

 spines very well (save the first, which is broken), the next succeeding 

 seven somites exhibit a section of their terga, and expose the sterna 

 of five somites seen from within, and the bases of the legs of the 

 left side, and all the legs of seven somites on the right side. 



In this specimen the legs, where fully exposed (PI. I. Fig. 12), are 

 17 millimetres long; the first two or basal joints which unite with 

 the sternum measure together 3 mm. ; the third joint is the longest 

 and widest (length 6 mm. and width 11 mm.) ; the fourth is 2 mm. 

 long, the fifth is 3 mm., and the sixth is 3 millimetres. 



At the base of each pair of legs, and lying in the median line of 

 the sternum, a pair of minute pores (PI. I. Fig. 5 6) or puncta are 

 seen, which are described by Scudder as " a pair of supposed branchial 



