176 



lobe, appears to be convex. The genal spine is directed somewhat out- 

 ward from the regular curve of the folded margin of the cheek. 



Horizon. Calciferous sandstone bed of E. 2 (a ?) at Young point.] 



PARADOXIDOID TRILOBITE. PI. XI. Figs. 1 a e. 



Trilobite Parts of a large trilobite were obtained from the sandy shale that holds 



Paradoxides. ^e ^ as ^ named species, but there was not enough of the middle piece of 

 the head to determine the genus. The known parts are such as might 

 be found in a Paradoxides having long eyelobes, and as belonging to so 

 old a fauna, these fragments are of especial interest. The parts indicate 

 a species as large as P. eteminicus or P. micmac. The form of the pygi- 

 dium indicates that the thorax possessed long, backward-bent posterior 

 pleurae. 



Sculpture. The matrix is so coarse that but little of the ornamenta- 

 tion is preserved. It may be said, however, that the movable cheeks 

 were marked by sub-parallel anastomosing raised lines, about 4 or 5 in 

 the space of a millimetre. The doubleur was also ornamented with 

 parallel raised lines. 



The movable cheek of an unknown trilobite, figured with the original 

 description of Holasaphus centropyge, is probably of this species. The 

 parts found are part of a glabella and of the movable cheek, two pygidia, 

 and various body segments. 



Horizon and locality. In sandy shale at Young point, George river, 

 Cape Breton, N.S. 



SOLENOPLEURA BRETONENSis, n. sp. PL XL, Figs. 5 a . 



Solenapleuro The middle piece of the head-shield is trapezoidal in outline. Anterior 

 sis. marginal fold prominent ; front area of the cheeks long, convex, and as 



wide as one-third of the length of the glabella. The glabella is ovate, 

 enclosed by deep dorsal furrows, and having a strong occipital furrow ; 

 three slightly impressed lateral furrows are formed on the glabella, of 

 which the posterior arises opposite the middle of the fixed cheek, and 

 curves backward nearly to the occipital furrow ; the middle furrow 

 appears a little behind the ocular fillet, and has a curve similar to that 

 of the posterior furrow ; the anterior furrow is opposite the ocular fillet, 

 is short and turns somewhat forward ; thus the two anterior furrows are 

 close together. The occipital ring is about as wide as the front area of 

 the cheek, is well rounded and has no spine. The fixed cheek has a dis- 

 tinct ocular fillet, and a long eyelobe ; it is tumid, but depressed con- 



