ulrich-bassler] revision of paleozoic bryozoa 291 



7. Arachnidiiim clavatiim Hincks, X 16, showing similarity to RJio- 



palonaria. 



8. Bowerbankia caudata (Hincks), X 16, exhibiting arrangement of 



the deciduous zooecia on the stolon. 



Vinella f radians (Nicholson and Etheridge, Jr.) p. 276 



9. Colony, two-thirds natural size. 



10. A nucleus with the radiating stolons, X 20. 



Carboniferous of England. 

 Heteroncma capillare genus and species new p. 278 



11. Small part of a large colony, X 9, growing upon a strophomenoid 



shell. The threads sometimes cross each other, simulating the 

 nucleus of a Vinella, while other threads appear to be jointed. 

 Silurian, Island of Gotland. 



Heteronema ? confextum new species p. 279 



12. Small part of a large colony, X 9, growing over the celluliferous 



face of a monticuliporoid bryozoan. 

 Corryville beds, Lorraine formation. Morrow, Ohio. 



Heteronema carbonariuni new species p. 279 



13. Several of the creeping threads, X 9, growing upon a Spirifer. 



Lower Coal Measures, Seville, 111. 



Allonema moniliforme (Whiteaves) p. 282 



14. A colony, X GYi. 



Devonian, Hay river, Canada. 



Plate LXVI 

 (Unless otherwise mentioned, the figures on this plate are X 9.) 



Arachnidium hippothooides Hincks p. 263 



Fig. I. Outline sketch of several zocecia of this living species, X 16, intro- 

 duced for comparison with species oi ■ Rhopalonaria. (After 

 Hincks, British Marine Poly::oa). . 



Rhopalonaria venosa Ulrich p. 268 



2. Portion of the. reticulate zoarium of this species growing upon a 



pelecypod. The substance of the zoarium is replaced by pyrites. 



3. Part of a colony with broader zooecia than usual, encrusting 



Ratiitesquina alternata. ,_ 



Lower bed^ of Richmond formation, Waynesville, Ohio. 



Rhopalonaria attenuata new species p. 269 



4. Part of a colony preserved as an excavated mold, with several 



branches growing so as to intersect each other, thus causing an 

 apparent irregularity in the growth. 



5. Portion of another colony preserved as an excavated mold on a 



gastropod, showing a more regular arrangement of the zooecia. 

 Both figures illustrate the extreme tenuity of the connecting 

 stolons and the very slight swelling of the zooecial part. 

 Rochester shales, Lockport, New York. 



Rhopalonaria rohusta new species p. 269 



6. The greater part of a colony illustrating the comparatively large 

 . size and general form of the zooecia. 



Oriskany (Camden chert), Camden, Tennessee. 



