148 ox PERMIAN ENT0M08TRACA FROM 



I named tins species with great pleasure after Baron von 

 Scliauroth, of Coburg, to whose assiduous researches in the 

 Permian rocks of Germany palaeontologists are greatly indebted. 



Found rarely in the shell-limestone of Tunstall Hill ; also in 

 a magnesian limestone at Hampole. 



Bairdia Kingii, Reuss. PL IX., fig. 8; woodcut 11. 



B. Kingii, Reuss. " Jahresbericht der Wetterau. 



Gesell. 1854," p. 67. 

 B. Kingii, Reuss, Kirkby. " Ann, Nat. His.," 3rd 

 ser., vol. ii., p. 327, pi. X., fig. 8. 

 Lengtli, l-22nd of an inch ; height, l-45th of an inch. 

 Carapace sub-reniform, with sharp ends ; dorsal margin 

 arched; ventral margin sinuate, becoming rapidly convex 

 at each extremity ; anterior and posterior extremities almost 

 alike, sub-angulate ; the posterior a little more angulate 

 than the anterior; lateral contour lenticular, slightly con- 

 cave posteriorly, greatest diameter centrally situate; ven- 

 tral overlap extremely slight. 

 Although I have identified the form just described with B. 

 Kingii, Reuss, there exists a little difference in the general out- 

 line. Reuss's figure represents the posterior extremity more 

 pointed, and the anterior wider and rounder, than the same fea- 

 tures in the Durham form. In other respects they agree. 



It may be well to remark that the authenticity of B. Kingii, 

 as a species, appears to be somewhat doubtful. Its differences 

 scarcely seem strong enough to keep it without the circle of 

 varieties of B. pleheia ; but as Dr. Reuss has described it as a 

 species, Mr. Jones and myself accept it as snch for the present. 



B. Kingii was first observed by Dr. Reuss in the Unter Zech- 

 stein of Bleichenbach. It is a rare species in the shell-lime- 

 stone of Tunstall Hill ; and as rare in magnesian limestone at 

 Hampole, Yorkshire. 



B. Kingii, var. compressa. PI. IX., fig. 7; woodcut 12. 



B. Pleheia, var. compressa. " Ann. Nat. His.," 3rd 

 ser., vol. ii., p. 325, pi. X., fig. 7. 

 Convexity of dorsal margin regular; anterior and posterior 



