CAMBRIAN - ROCKS IX SOUTH SHROPSHIRE. 667 



From the Shineton Shales at Shineton. Common. I am indebted 

 to my friend, Mr. C. Bird, B.A., of Bradford, for the loan of speci- 

 mens of this and other species. 



These two species are distinguished from Olenus proper by their 

 wide, rounded side cheeks, with spines proceeding from the middle, 

 and they are more nearly allied to some of Angelin's subgenera. 0. 

 Salteri resembles Leptoplastus, Aug., in its short head-spines, and 

 Splice roplitlialmus in its convex, nearly circular eye ; while 0. tri- 

 arihrus has the long cheek-spines of Eurycare, Ang. I am not, 

 however, prepared to suggest a new generic name for Trilobites 

 which are essentially Oleni. 



Conophrys, Call. 



Coaoplirys, Call. Quart. Journ. Geol. Soc. vol. xxx. p. 196. 



Yery small, not more than | inch loug, oval, convex. 



Head subquadrate, front rounded ; glabella three fourths the length 

 of the head, behind as wide as the side cheeks, its sides parallel for 

 two thirds of its length, with two very small lobes on each side 

 deeply separated from the cheeks, abruptly expanding in front into 

 two side nodules, its anterior margin hardly distinguished from the 

 front portion of the head ; neck and side cheeks with deep marginal 

 furrow behind ; no trace of eyes or facial suture. 



Thorax a little longer than the head, of six rings ; axis a little 

 wider than the pleurae in front, rather less than the pleura? behind, 

 rings nodular at the sides ; pleurae bent down sharply at half their 

 length, for three fourths of their anterior breadth raised above the 

 hinder margin, and separated from it by a narrow sulcus. 



Tail about half the length of the thorax, semicircular behind and 

 slightly indented, with a narrow raised margin ; axis nearly reaching 

 the margin, of four rings ; sides consisting of three rings raised in 

 front: margin, axial rings, and side rings all covered with small 

 tubercles. 



This curious little genus is easily distinguished by its peculiar 

 glabella. Its small size at first suggested that it was embryonic ; but 

 upwards of 20 specimens in my collection, with others that I have 

 seen, show no signs of transition into any thing different, the cha- 

 racters being remarkably permanent. I am unable with certainty 

 to refer it to any known family. 



Coxophrys salopiensis, Call. (Plate XXIY. fig. 7.) 



Same reference as genus. 



Prom the Shineton Shales at Shineton, arenaceous beds west of 

 Harley, Dictyonema-shales at Malvern (Dr. Grindrod's Museum). 



Lichapyge, Call. 



Licliapyge, Call. Quart. Journ. Geol. Soc. vol. xxx. p. 196. 



Pygidium minute, semicircular in front, a little longer than 

 broad ; axis of three or more rings, convex, sharply defined, rather 



