110 a. F. MATTH?]W ON THK ORGANIC REMAINS OF THE 



The segments are from two and one-half to three times as wide as long, and possess 

 thickened or overlapping edges. Remains of slender legs, apparent!}' one to each segment, 

 are to he seen along some portions of the body. 



Size, — Length of the part preserved 40 mm., width 1 to 1| nnii. 



Horizon and Locality. — In the fine dark gray shale of plant bed ISTo. 7 of tlie Lower Cor- 

 daite shales, Lancaster, IT. B., Canada. Rare. 



This very slender species has an extremely thin test and is but faintly preserved on the 

 stone ; it might be thought to be a very slender worm. In its slenderness and faint preser- 

 vation it may be compared with Dr. S. H. Scudder's llyodes elongata of the Coal-measure 

 shales of Mazon Creek, Illinois ; it however is more slender and has comparatively longer 

 joints. 



Chilopus dubius, n. gen. et sp., PL I., iig. 6. 



A minute articulate animal having a series of joints with a leg attached to each, occurs 

 in these shales. 



The part preserved is su^jposed to be the caudal part of the body. There are nine long 

 joints and two short joints or appendages at the extremity. 



Only the dorsal scutes are visible ; these are about as wide as long and are rounded at 

 the back. Each plate slightly overlaps the one behind it. No ventral plates are visible and 

 no stomata have been observed. 



The legs are about half as long as the width of the rings, and no joints have been 

 detected, but a bright band (due perhaps to a muscular thickening of the substance within 

 the test) extends from the base of the leg diagonally forward to the middle of the preceding 

 joint of the body ; this band is most distinct on the fourth joint. 



Size. — Length 7 mm. "Width exclusive of the legs 1 mm. 



Horizon and Locality. — Dark shales of plant bed !No. 2, Lower Cordaite shales, Lancaster, 

 N. B., Canada. Rare. 



This species is referred to the Chilopods with doubt, for it is not preserved in the usual 

 attitude of the Myriapods of this order, being compressed sidewise, but it cannot be a Diplo- 

 pod or Archipolypnd owing to the length of the scutes, and to its having onlj' one pair of 

 feet to each joint. The rarity of millipede remains of such antiquity as these is my excuse 

 for giving a generic name to this little one, and as there is no other like it the specific des- 

 cription will stand for the genus. 



