FROM THE CARBONIFEROUS FORMATION. 165 



spines are attached (PI. 12, fig. 5) ; it appears as a straight, cylindrical, slightly tapering, 

 unjointed rod, 4 mm. long, 0.3 mm. broad, the segment from which it springs being 

 5.3 mm. broad ; it has the appearance of a spine, but is altogether unlike any of the other 

 spines and probably represents the intromittent organ. 



The next sjiecimen to be discussed is a fragment received from Mr. Pike after this paper 

 was written, and is introduced here with a figure (PI. 13, fig. 8) of a portion of it, because 

 it exhibits certain features of the ventral portions seen on no other examined. It repre- 

 sents the posterior half, more or less, of a myriapod, extended in a slight sinuous curve, 

 the legs trailing beneath, and a few spines showing above. The length of the fragment 

 is 47 mm., its breadth in front 4 mm., and beyond the middle of its posterior half 1.9 mm.; 

 beyond this it is very obscure, but between these two points it seems to taper regularly. 

 From twenty-one to twenty-three segments are preserved. The jointing of the legs is 

 very obscure but appears to be as in the figure, the basal joint seen, undoubtedly the 

 second, being about as long as the rest of the leg ; the legs are about as long as the width 

 of the body, slender and tapering. The subdorsal series of spines, the only ones preserved, 

 are rather small, and show only here and there, and obscurely, any subsidiary spinules. 

 What, however, is of the chief interest is the preservation of the ventral plates in an 

 unusual manner ; these are separated from the dorsal plates by a straight line along the 

 middle of the body, and appear to be four in number to each dorsal plate ; in reality 

 there are two, each being again divided into a pair of subsegments by a transverse line 

 just behind the middle and only a little more faintly incised than the lines of demarkation 

 between the plates ; the appendages are borne only by the anterior, larger, subsegment ; 

 these are, so far as can be seen, the legs, which are attached at the extreme base in circu- 

 lar pits ; and just above them the spiracles, slender, ovate in form, their longer diameters 

 nearly as great as the diameter of the leg-pit and placed a little obliquely but nearly trans- 

 verse to the body, the upper end furthest back, thus differing from Acantherpestes only by 

 their slight obliquity. The sight of this specimen inclines me therefore to believe Meek 

 and Worthen to have been correct in referring the openings above the leg attachments 

 (see fig. 6, supra) to spiracles, which they speak of as less rounded than the pits supposed 

 to be the points of attachment of the legs to the body. A similar division of the ventral 

 plates into subequal anterior and posterior portions is evident in other species of Euj)ho- 

 beria, as may be seen from the plates. 



Mr. Bliss sends an interesting specimen not very well preserved, indeed, but showing 

 some valuable features of the head (PI. 13, fig 7). It represents about twenty segments of 

 the body besides the head, lying flat in a straight line, with the lateral rows of spines project- 

 ing equally on either side. There are two peculiai'ities in it which seem to make it a little 

 doubtful whether it should be referred to any of the species of Euphoberia here described : 

 first, the segments are extremely crowded and very short compared to their breadth, vary- 

 ing from two and a half to three times as broad as long ; second, the portion of the body 

 exposed, though very favorably displayed for exhibiting any such feature, shows scarcely 

 any enlargement of any region of the body ; it does indeed taper slightly from about the 

 eighth segment forward, but so slightly as hardly to be noticed without direct observa- 

 tion ; the margins of the body are, however, poorly preserved and may give it a deceptive 

 appearance ; it differs slightly also from other specimens of this species in the brevity of 



