248 TRANSACTIONS OF THE [mAR. 15, 



Gasteropoda. 



Bellerophon Urii, Flemiuo;. 

 " hiulcus, Martin. 



Katicopsis globularis, Bolton. 

 FapJiistoma (?) ornafa, Bolton. 

 3Ielanidie (several undescribed species). 



Cephalopoda. 



Nautilus ])recox, Salter. 



" sp. 

 Ccelonautilus subsuJcatus, Phillips. 

 Discites falcatus, Sowerby. 

 Orfhoceras giganteiim, (?) De Kon. 



" cinctum, Sowerby. 



" obtiisum, Brown 



" (several species not defined). 

 Goniaiites Listeri, Martin. 



" carbonarius, Goldfuss. 



" atmfus, Goldfuss. 



" reticulntus, Phillips. 



" hUlnguis, Salter. 



Places. 



As many species range all througU the Lower and Middle 

 Coal Measures, we have placed a single list after the Middle 

 Coal Measure Mollusca in which all the known species are 

 jjlaced. 



Middle Coal Measure Fauna. 

 Annelida. 



Spirorbis pusillus, I\Iartin. 



brachiopoda. 



Productus scahrictdus, Martin. 

 Discina orbicularis, Bolton. 



arthropoda. 

 ostracoda. 



Beyrichia arcuata, Bean. 

 " Binneyana, Jones. 



XiPHOSURA. 



Frestwichia roiundnia, Prestwich. 



" Birtwelli, H. Wood. 



Cyclus Johnsoni, H. Wood. 



MYRIAPODA. 

 Euphorberia Broivni, H. Wood. 

 Arachnoidea. 



Architarbus subovalis, H. Wood. 



