CARBONIFEROUS MYRIAPODA OF ILLINOIS. 435 



nearly equal parts, lying one above the other, the upper and lower parallel, the middle 

 and longer piece, really the anterior third, a little oblique, crossing one end of one of 

 the others. The great length and slenderness of the specimen with the subqtiadrate 

 form of the segments leave no room to doubt that it belongs here, but it shows very 

 little, for the head is unprovided with appendages, and only slight indications of spines, 

 quite as in the other specimens, appear. Some parts display the legs fairly well, showing 

 that they were very slender and tapering, considerably longer than the breadth of their 

 segments. The body appears to have been largest near the base of the anterior third 

 and to have tapered very slightly in either direction, the hinder end quite blunt. If it is 

 not broken, but the disconnected parts are united beneath the present exposed surface 

 of the stone, its total length must have been fully a decimeter; if broken and all parts 

 are seen it would still be 9 centimetres long, while its greatest breadth is 2.5 mm., and 

 at the hinder extremity 1.75 mm. 



The specimen comes from Mazon Creek, 111., and was received from Mr. E. D. 

 Lacoe, in whose collection it bears the number 1838ij. 



Another specimen has been received fi'om Mr. W. F. E. Gurley from the same local- 

 ity, but is exceedingly imperfect; it is apparently a young specimen, being if uncoiled 

 only 40 mm. long. It is too poor to measure the breadth at any point, but it appears 

 to have been equally slender with the others. 



The species is remarkable for its nearly uniform and slender body, the great length 

 of the segments as compared with the width of the body, the slenderness of the legs, 

 and the unusual distance apart of consecutive jiairs. 



Euphoberia sp. 

 Mr. R. D. Lacoe has sent me a straight fragment of a Euphoberia, composed of 

 about fifteen or sixteen similar and equal segments from what is apparently about the 

 middle of the body, but which is too imperfectly preserved to determine the species, 

 though it perhaps represents E. tracta or E. simplex. It would not be worth mention- 

 ing but for the appearance it presents of being covered above with a mat of flowing hairs, 

 here appressed to the surfice. The segments are about half as broad again as long, 

 and their surface finely granulate. The total length of the fragment is 26 mm.; it 

 comes from Mazon Creek, 111., and is marked 1889a, by Mr. Lacoe. 



Euphoberia anguilla. 



PI. 30, fig. 3, 

 Enplwheria anguilla Scudd., Mem.Bost. Soc. N'at. Hist., iii, 177, PI. 12, fig. 20 (1882). 

 An additional specimen (fig- 3) has been found, but it adds little to our previous mea- 

 gre knowledge. It is nearly complete, however, though the head end is altogether ob- 

 scure. It lies in an arcuate position upon the stone, the dorsal parts convex, and the 

 legs drooping from the under surface. The head is very obscure, but apparently agrees 

 with what is seen in the original specimen, and, as thei-e, no appendages are visible. 

 The body is largest in the middle of the anterior half and tapers very gently in each 

 direction, the tail being about half as wide as the broadest portion, which is not so nar- 



o 



