174 S. H. SCUDDER ON SPINED MYRIAPODS 



head, upon a side view. The fragment is 16 mm. long, somewhat curved, and shows spines 

 upon one side and some legs upon the other. The spines are small and obscure, 1 mm. long 

 and scarcely more than one-fourth as long as the width of the body. The legs are more 

 distinct and are considerably longer than the width of the anterior segments where only 

 they can be seen ; a single unusually stout pair is attached to each of the first two seg- 

 ments behind the head, much stouter than, though of the same length as, the legs behind 

 them, probably from being preserved on a front instead of a lateral view, thus indicating 

 the possible paddle-like condition of legs, which appear to be very slender ; whether there 

 are other legs attached to those segments is uncertain ; these legs are 3.5 mm. long, as 

 long as the width of the body at this point. 



The head is considerably larger than the segments behind it and droops as in the second 

 specimen described, falling considerably below the level of the body. As there, the front 

 is full and well rounded, and terminates below in a beak-like projection, forming a very 

 pointed and slightly recurved lip. From the lower portion of the front, at the base as it 

 were of the lip, projects the single, basal, joint of an antenna, which is somewhat obovate in 

 shape and 0.5 mm. long. 



This species is remarkable for the suddenness with which, and extent to which, the body 

 tapers ; the hinder half as a whole is only about half as broad as the front half as a whole, 

 and somewhere about the middle of the body nearly the whole alteration in size occurs, 

 falling often upon three or four segments. In the character of its spines, it is closely 

 related to the preceding species, but the subdorsal rows are not nearly so distant from 

 each other. It is also related to the same species in the form of the segments as a whole, 

 but differs in this respect from the two following species, in each of which the segments 

 have a peculiar form, and where also the outline of the entire body is different. 



The opportunity of studying this species is due mainly to the favor of Mr. J. C. Carr, of 

 Morris, 111., for whom the species is named and to whose cabinet four of the five specimens 

 belong. The remaining one belongs to the collection of Mr. P. A. Armstrong. They 

 occur in the ironstone nodules of Mazon Creek. 



Euphoberia flabellata, nov. sp. 

 PI. 13, fig. 15. 



Through the kindness of Mr. Pike I have been aide, after the other species had been 

 studied, to examine another and tolerably well preserved specimen of this group of myri- 

 apods, which can be referred to none of them. It lies upon its side, coiled into the 

 commencement of a very open spiral, and although preserving none of the spines and 

 only a few of the legs, and these imperfectly, it is interesting from the good preservation 

 of the hinder segments, and the exhibition of the dorsal and ventral plates abutting against 

 each other along a line passing nearly clown the middle of the exposed surface. 



The entire body is preserved in its continuity and consists apparently of thirty-five seg- 

 ments besides the head. The body tapers forward from the eighth segment or thereabouts, 

 and rather rapidly, so that the anterior extremity, including the head, which does not 

 appear to be larger than the segments next it, is scarcely one-fourth the width of the 

 eighth segment; behind this, however, it apparently tapers scai-cely at all, until near the 

 hinder end, when the last six or eight segments, and especially the last four, rapidly narrow ; 

 the dorsal plates however do diminish in size from near the middle of the body backward, 



