EXPLANATION OF PLATE XII 



Page 



Figs. 1-11. Pugnoides ottfmwa (White) 612 



1-2, 3-4. Brachial and pedicle views of two typical speci- 

 mens. 



5-6, 7-S. Brachial and lateral views of two more exam- 

 ples. 9-10. Brachial and anterior views of another 

 specimen. 11. Pedicle view of an individual with a 

 uniplicate sinus. 



Figs. 12-13. Girtyella indianexsis (Gip.ty) 613 



Brachial and lateral views of a nearly perfect specimen. 



Figs. 14-17. Composita trinuclea (Hall) 614 



Brachial and pedicle views of two average specimens. 



Figs. 18-19. Spirorbis F0R■^-D0DGE^'^SIS n. sp 609 



18. The cotype at tip of the paper pointer; note the 

 growth lines. 19. A smoother specimen. The host 

 in each case is Spirifer pellaetisis. Both specimens 

 enlarged times 3/2. 



Fig. 20. Batosto jiella ( sp. ) 610 



Fragment of a branching zoarium, x3/2. 

 Figs. 21-22, 24, Orthotetes kaskaskiensis (McChesney) . . . . 611 



21-22. Pedicle and brachial views of u, nearly complete 

 specimen. 



24. Part of the interior of an unusually large specimen 

 showing the median septum and muscle scars. 



Figs. 25-26. Clionolithes lizardensis n. sp , 605 



25. Brachial view of a specimen of Spirifer pellaensis 

 partly, disintegrated by the boring-s of this sponge. 



26. Another shell of the same species showing the burrows 

 and several tunnels. Holotypes. Both specimens 

 x3/2. • 



Fig. 27. Anisotrypa Fistui.osa Ulricii 610 



A fragment of a zoarium encrusting a piece of brachiopod 

 shell, x3/2. 



Figs. 23, 28-34. Spirifer pellaexsis Wei.ler 613 



23. Bracihial view of a large, long hinged specimen. 

 Note that figure 25 is an example of the rarer short- 

 hinged forms. 28-29. Brachial and lateral views of a 

 "square-shouldered" individual. 30. A separate 

 pedicle valve. 31. Posterior view ol a typical shell. 

 32-34. Brachial, pedicle and anterior views of a very 

 perfect specimen. 



Fio. 35. Phillipsia (sp. undet.) 615 



An imperfect pygidium showing some of the features of 

 this genus. 



