108 G. P. MATTHRW ON THE OEGANIC REMAINS OF THE 



4. Description of the species of Myriapods of the Little R. Group. 



PROTOSYONATHA. 



PAL^OCAMPA, Meek and Worthen, 1865. 

 Pal^ocampa (?) OBSCURA, n. sp., PI. I., fig. 1. 



Body cylindrical in the anterior part, of 10 to 20 segments, or more. 



Head subtriangular. Body segments obscure, three times (?) as wide as long. 



No legs or stout spines known, but the whole surface of the scutes is covered with 

 numerous bristles, which obscure the sutures and other features of body. 



Size. — Length 45 mm. ? Width 8 mm. 



Horizon and Locality. — Dark gray shales of plant bed No. 2 ' Lower Cordaite shales. 

 Fern Ledges, Lancaster, N". B. Rare. 



It is doubtful if this Myriapod is a Palœocampa, for the bristles do not appear to be in 

 tufts, but evenly distributed ; and the body is preserved in the shale, flattened from above, 

 not flattened sidewise as in the type of the genus figured by Meek and Worthen- : still the 

 object is too imperfectly preserved to make the basis of a new genus. 



ARCHIPOIiYPODA. 



EUPHOBERIA, Meek and Worthen. 

 EuPHOBERiA ATAVA, u. sp., PI. I., figs. 2 and 2a. 



Body elongate consisting of about 60 segments. For about three-quarters of its length 

 it is of nearly equal width, then it narrows somewhat abruptly to the head, and more toward 

 the tail, where it tapers to a somewhat blunt extremity. 



The head is somewhat trapezoidal, with the anterior corners rounded. On each side 

 are projecting, semilunar processes of thinner substance, and there is also a rounded projec- 

 tion at the front of the head. At the anterior corners are stout antennœ that taper to a 

 point, and are twice as long as the head. 



The segments of the body are about three times as wide as long. There is a thickened 

 band (perhaps marking the position of spiracles) between the dorsal plate and the insertion 

 of the legs. The legs are slender, and longer than one-half of the width of the body. A 

 row of sjjines is visible along the back, one of which appears to be forked. 



Sculpture. — The surface of the dorsal plates is diversified with scattered tubercles in 

 interrupted rows. The spines are striated longitudinally. Tlio legs in the middle half of 

 the body were ornamented in front with a pair of tubercles, connected by a narrow ridge. 



Size. — Length, 60 mm. ; width, 12 mm. ; length of the visible part of the legs, 8 mm. ; 

 width, 1^ mm. ; length of spines, 2^ mm. or more. 



Horizon and Locality. — Li plant bed No. 8, Lower Cordaite shales. Fern Ledges, Lan- 

 caster. Rare. 



Condition. — In the only specimen of this species that we have, the head and the segments 

 of the anterior third of the body are badly preserved, and the latter a good deal shrunken 



' Observations on the Geology of Southern New Brunswick. Appendix A, by C. Fred. Hartt, Fredericton, 1865. 

 '' Geol. Survey of Illinois, Vol. II., p. 410, PI. 32., fig. 3. 



