2^^ SMITHSONIAN MISCELLANEOUS COLLECTIONS [vOL. 45 



Order CTENOSTOMATA Busk. 

 Family RHOPALONARIID^ Nickles and Bassler. 

 Genus Rhopalonaria Ulrlch. 

 R. venosa Ulrich. Ordovician — Richmond formation. 

 R. attcnuata new species. Silurian — Clinton limestone and Roches- 

 ter shales. 

 R. ? antiqu a {Vox tXock) . Silurian of Ireland. 

 R. robnsta new species. Devonian — Camden chert. 

 R. tennis new species. Devonian — Hamilton formation. 

 R. iiiedialis new species. Devonian — Hamilton formation. 

 R. capillaris (Dollfus). Devonian of France. 

 R. f vctnsta (Oehlert). Devonian of France. 

 R. kcokukensis new species. Mississippian — Keokuk formation. 



Family VINELLID^ new family. 

 Genus Vinella Ulrich. 

 V. repens Ulrich. Ordovician — Black River formation. 

 V. radialis Ulrich. Ordovician — Lorraine formation. 

 V. radiciformis (Vine). Silurian — Wenlock and Rochester shales. 

 V. radiciformis conferta Ulrich. Silurian — Waldron shales. 

 V. ? multiradiata new species. Silurian — Rochester shales. 

 V. ? radians (Nich. & Ethr., Jr.). Carboniferous of Scotland. 



Genus Heteronema new genus. 



H. capillare new species. Silurian of Gotland. 



H. f contextum new species. Ordovician — Lorraine formation. 



H. carbonarinm new species. Pennsylvanian. 



Genus Allonema new genus. 

 A. hotelloides new species. Silurian of Gotland. 

 A. hotellus (Vine). Silurian of Gotland and England. 

 A. zmldronense new species. Silurian — Waldron shale. 

 A. sitbfusiforme new species. Silurian of Gotland. 

 A. fnsiforme (Nich. & Ethr., Jr.). Devonian — Hamilton formation. 

 A. moniliforme (Whiteaves). Upper Devonian. 

 A. rnoniliforme-aggregatuiu new variety. Devonian-Hamilton for- 

 mation. 

 A. ? minimnnv new species. Pennsylvanian. 



Family ASCODICTYONID^ Ulrich (Restricted). 

 Genus Ascodictyon Nicholson and Etheridge, Jr. 

 A. siluriense Vine. Silurian — Rochester and Wenlock shales. 

 A. aiiforme Vine. Silurian — Wenlock shales. 



