T. Davidson — Upper Silurian Brachiopoda. 



153 



12. Strep torhynchus nasiitum, Lindstrom. 

 Cyrtia ? namta, Dav., Sil. Mon. p. 201, pi. xxv, figs. 1, 2. 

 For a long time much uncertainty has prevailed with respect to 

 the genus to which this remarkable species should be referred. It 

 was in 1860 described b}' Prof. Lindstrom as a Strophomena, but the 

 fortunate discovery of perfect interiors of Swedish examples has 

 enabled Prof. Lindstrom to place this shell in King's genus 

 Strejptorliijnchus. Prof. Lindstrom's beautiful figures in pi. xvii. of 

 his work " Fragmenta Silurica " clear up all uncertainty in the 

 matter. This little shell appears still to be very rare in Great 

 Britain, for I am acquainted with four specimens only. One of 

 these was found by the Rev. H. G. Day in the Wenlock Limestone 

 of Benthall Edge, another in the same limestone at Dudley, and 

 the two specimens have been liberally presented to me by their 

 discoverer. 



13. Genus Uncites, Defrance, 1828. 



For many years past I have been on the look out for specimens that 

 would clear up the interior characters of Defrance's Devonian 

 genus. In 1853, in the General Introduction of my work on. 

 " British Fossil Brachiopoda," I described and figured part of the 

 interior of the dorsal valve, showing the lateral pouch-shaped 

 cavities opening exteriorly, as well as the attachments to the hinge- 

 plate of the principal stems of the spiral appendages, also 

 indications of the spiral appendages fi'om a specimen which 

 Prof. Beyrich of Berlin was so fortunate as to discover at 

 PaftVath, and which was brought to my notice by Prof. E. Suess 

 of Vienna. 



In 1871, Prof. Qnenstedt, in pi. 43 of the Atlas to his "Die 

 Brachiopoden " (Petrefactenkunde Deutschland), figures spiral coils 

 in a specimen of Uncites. No one, as far as I am aware of, seems to 



20. Specimens of Uncites gryphus in the Imperial Museum of Vienna. 



21. Restored interior of the dorsal valve, a cardinal process ; b principal stems 

 of spirals ; c connecting lamellce ; d spu'als ; e pouch-shaped expansions. 



