PALASTERINA ANTIQUA. 



229 



(3) A new specimen from the Wenlock of Gutterford Burn, in the Royal 

 Scottish Museum, Edinburgh. 



The fourth and fifth specimens are from a slightly higher horizon, the Lower 

 Ludlow of Church Hill quarries, Leintwardine, and are in the Britisli Museum 

 (Nat. Hist.). One of these is the type of Gregory's species P. " bonneyi" and shows 

 both oral and apical surfaces (do. 40299). The second specimen shows only the 

 apical surface (no. 40301). 



S3 



r f 



X . 



I 





Text-fig. 1(55. — Liljevall's original drawing of Palasteriila antiqua (reproduced from 'Geol. Mag.,' 1899, 



pi. xvi, fig. 1 b). x 4. 



Although there are differences between the specimens I think that they can be 

 best explained as due either to the age of the individual animal, accidents in 

 preservation, or slight differences in the geological horizon. 



Specific Characters. — See p. 220. 



(1) Description of Type- Specimen, from (u>ti<t)<d {Text-fig. 165). 



If we turn to the illustration (Text-fig. 165), we observe that at first sight 

 there are, apparently, infero-marginalia at both sides of the arms pointing S.E. and 



31 



