Plate 16 



Page 



1 . Eepiaria gaspSensis, new species 63 



View of gutta-percha squeeze of the holotype exhibiting the fre- 

 quent zoarial branching and the short, thick, close-set tubes, 

 attached to a brachiopod valve. 



Devonian (Gaspe sandstone), Gaspe, Quebec. 



2. Reptaria cayuga, new species 63 



Gutta-percha squeeze of the type, occurring as an excavation in a 

 cephalopod shell {Mitroceras) ; the small dimensions of the 

 zooecia and their less regular arrangement are the distinguish- 

 ing characters. 



Silurian (Cayugan-Bertie limestone), near Buffalo, N. Y. 



3. Reptaria doudi, new species 63 



Part of the type preserved as a cast upon a cephalopod shell but 

 exhibiting small zooecial dimensions and the rectangular 

 method of branching. 

 Upper Devonian (Tully limestone- West Brook member), 2)4 miles 

 south of Sherburne, N. Y. 

 4-8. Reptaria stolonifera Rolle, 1851 62 



4, Copy of Hall's illustration, X 7, showing method of branching. 

 Hamilton (Ludlowville shale), Cazenovia, N. Y. 



5, Portion of a much-branched zoarium with the tubes preserved as 



molds in the rock. 



6, View of a single branch with the zooecial tubes crushed but 



still showing their regular arrangement. 

 Hamilton (Ludlowville shale), Kashong Creek, N. Y. 



7, Young specimen showing the ends of the branches with tubes 



not yet reaching their normal length. 

 Hamilton (Widder shale), Thedford, Ontario. 



8, An example with tubes marked by distinct wrinkles. 

 Hamilton (Sellersburg limestone). Falls of the Ohio. 



9. Reptaria (Bryozoon) steiningeri (BsiTTande, 186S) (Thamnocoeluyn pen- 



nulatum Pocta, 1894). 

 View of the type, two-thirds natural size, incrusting an Orthoceras 

 shell (after Pocta). 



10. Hernodia (?) cooperi, new species 66 



The type specimen incrusting a stony bryozoan and exhibiting the 



short, rapidly expanding zooecia. 

 Hamilton (Ludlowville- Wanakah shale), Averys Creek, Erie 



County, N. Y. 



91 



139917 — 39 7 u. s. government printing office; 1939 



