293 



parallel or converging. Between each two of the principal ribs there is_a _ 

 smaller one which is only slightly elevated, and seems to become obsolete 

 before reaching the margin. There is evidence that the four principal ribs 

 terminate in short spines. 



Glabella with a few small tubercles ; cheeks coarsely punctate ; pygidium 

 with three or four tubercles on the principal ribs. The surface in all the 

 specimens is, however, not well preserved. 



Length of the best preserved fragment of the head, 3 lines ; width of 

 the glabella at the front lobe, 2i lines ; at the neck-segment, about 1 line ; 

 length of the axis of a pygidium, 3 lines ; width of the same at the 

 anterior margin, 1J lines. 



The specimens of the pygidium are all imperfect, but when in their 

 natural position, I think the ribs converge backwards, and that they all 

 terminate in small spines. One specimen clearly shews some of these 

 spines. 



Locality and Formation. N, Table Head and Pistolet Bay, P, Port- 

 land Creek, Newfoundland ; Quebec group. 



Collector. J. Richardson. 



REMOPLEURIDES PANDERI. (N. sp,) 



Fig. 283. 



Description. Head small, the space between the eyes transversely 

 elliptical, and about one-fourth wider than the length of the whole head. 

 The neck segment is distinctly defined by the neck furrow, and apparently 

 half the width of the space between the eyes. The dorsal furrows extend 

 forward a little more than one-third the length of the head from the neck- 

 furrow, and appear to have each a small pit in the bottom. The eyes are 

 semicircular and two-thirds the length of the head, their posterior corners 

 situated at the front edge of the neck furrow and close to the dorsal fur- 

 rows. The dorsal furrows are distant from each other at their anterior 

 extremities about one-third the distance between the outer curve of the 

 eyes ; they are a little more widely separated behind. The front part of 

 the glabella which forms the projection characteristic of this genus, is one- 

 fifth the length of the head, and is about as wide as the space between the 

 neck furrows. 



Only two specimens have been collected, each a little less than 2 lines 

 in length. 



No glabellar furrows are visible. 



Locality and Formation. N, Table Head, Newfoundland ; Quebec 

 group. 



Collector. J. Richardson. 



