FROM THE CARBONIFEROUS FORMATION. 



161 



Fi e . 6. 



Euphoberia armigera; figure D of Meek and Worthen. 



The specimen figured in the Illinois report under the letter D, here reproduced in figure 

 6, by favor of Mr. Worthen, and which is copied by Woodward as above referred to, 

 exhibits an inferior side view of the entire animal extended in a straight line. From this it 

 seems that the tapering form of the creature does not appear on a side view, and it is even 

 drawn as enlarging toward the head, which is considerably larger than any other part of the 

 animal ; toward the hinder extremity, however, it tapers gently ; " the entire length is 3.S 

 inches and its breadth about 0.2 inch." The head is " semicircular, as wide as any part of 

 the long slender body. It is not 

 in a condition to show the eyes, 

 nor are any remains of mandi- 

 bles, antennae or other append- 

 ages preserved." It is repre- 

 sented as less than twice as 

 broad as long. The segments are apparently nearly forty in number besides the head ; of 

 the ventral plates " as many as about seventy-five or seventy-six may be counted." The 

 segments themselves are represented as only slightly and uniformly arched on a side view, 

 and appear to be scarcely more than twice as broad as long. According to the authors, 

 the surface of all their specimens, this included, show " a minutely granular appearance ;" 

 but they figure only that of one of the others, with which I have a specimen agreeing, which 

 seems to belong certainly to a distinct species, much more granular than those I would 

 refer to this, and I therefore doubt whether the same description should apply to all of 

 Meek and Worthen's specimens. The spines are all represented in dotted lines and 

 it is impossible to say how much of them is intended to represent what can be 

 seen on the specimen. They are lepresented on every segment behind the head. The 

 legs are also mostly given in dotted lines, there being only one exception, where it is 

 given fully as long as the width of the body and composed of four equal joints ; the text, 

 which refers to them all, says " five gradually tapering joints." On the ventral plates 

 little round openings are marked a little above the bases of all the legs, and above them 

 smaller dots ; the former, say the authors, may be the point of attachment of the legs ; 

 the others they compare to spiracles. 



The second specimen figured by Meek and Wor- 

 then, marked C on p. 556, and reproduced here in 

 fig. 7, is the posterior portion of a similar animal, pre- 

 senting the same view as the last mentioned, but bent 

 abruptly downward at the posterior end ; it is much 

 more tapering at the hinder end than at the other, 

 being at this part only a little more than half as large 

 as the broken anterior end ; although imperfect, it is 

 larger than the other and nearly as long. It has 

 twenty-three segments, which are uniformly arched 

 on a side view, and not more than twice as broad as long. The same statement concern- 

 ing the surface sculpture may be made of it as of the other specimen. The spines, many 

 of which of the subdorsal (?) series are represented, are rather short and stout, generally 

 less than half as long as the width of the body, but as they appear to originate on its 



Euphoberia armigera ; fig. C of 

 Meek and Worthen. 



MEMOIRS BOST. SOC. NAT. HIST. VOL. III. 



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