A CARBONIFEROUS FAUNA FROM NOWAJA SEMLJA. 185 



Fig. 18a. Squamularia sp. a. Lateral view of same. x 1/1. 



Fig. 18&. ■ Dorsal view of same. x 1/1. 



Fig. 19. Squamularia sp. b. Lateral view of a mature (?) specimen. x 1/1. 



Fig. 19a. Ventral view of same, x 1/1. 



Fig. \9h. Dorsal view of same. x 2. 



Fig. 20. Athyrid. Dorsal view of circular form. x 5/2. 



Fig. 21. Dorsal view of elongate form. x 5/2. 



Fig. 22. Camarospiral sp. Restored outline of largest specimen, slightly enlarged. 



Fig. 22a. Fragmentary pedicle-valve showing the median septum and spondylium. x 3/1 . 



Fig. 22b. Transverse section of a brachial valve, about 2 mm. from umbo. Showing the 



median septum and the absence of a spondylium. x 2/1. 



Fig. 22c. Transverse section of a pedicle valve, about 3 mm. from umbo, x 6/5. 



Fig. 22«\ Transverse section of another pedicle valve, near frontal margin. x 11/7. 



Plate II. 



Fig. 23. Orthotetid, indet. Pedicle-valve. x 1/1. 



Fig. 23a. ■ A brachial valve referred to the same species. x 1/1. 



Fig. 24. Schizophoria sp. Slightly oblique view of a decorticated brachial valve showing the general 

 appearance of the muscle-scar. x 1/1. 



Fig. 24a. Isolated pedicle-valve. x 1/1. 



Fig. 24&. ■ Outline of a complete specimen. x 1/1. 



Fig. 25. Chonetes papilionacea (Phillips). Brachial valve. 1/1. 



Fig. 26. Chonetes sp. Coarse-ribbed form. Pedicle-valve, x 1/1. 



Fig. 26a. The same, enlarged. x 2/1. 



Fig. 27. Chonetes sp. Smooth-ribbed form. External view of a pedicle-valve. x 1/1. 



Fig. 27a. Internal view of another pedicle-valve. x 1/1. 



Fig. 28. Chonetes sp. Dorsal view of a specimen, showing the ribbing characteristic of Chonetes cf. 

 crassistria [Vaughan]. x 1/1. 



Fig. 28a. The same, enlarged. x 2/1. 



Fig. 29. Productus cf. margaritaceus (Phillips), x 1/1. 



Fig. 30. Productus spinidosus J. Sowerby. Fragmentary pedicle-valve. x 1/1. 



Fig. 31. Productus longispiwis J. Sowerby. Slightly lobate form. x 1/1. 



Fig. 32. var. ? Lateral view of a pedicle-valve belonging to the globose and fine-ribbed 



form, x 1/1. 



Fig. 33. Productus concinnus J. Sowerby. Brachial valve (partly as a mould), x 1/1. 



Fig. 34. Productus (Proboscidella) nysti de Koninck. Ventral view. x 1/1. 



Fig. 34a. Outline of same specimen, showing part of the brachial valve in apposition. 



x 1/1. 



Fig. 35. Productus coatsi sp. nov. The specimen is slightly distorted. x 1/1. 



Fig. 35«. Outline of another specimen. x 1/1. 



Fig. 36. Productus keyserlingianus de Koninck, var. (The ornamentation has been completed from 

 another specimen.) x 1/1. 



Fig. 36a. Outline of the same. x 1/1. 



Fig. 37. Productus cherneyensis sp. nov. x 1/1. 



Fig. 37a. Outline of the same. x 1/1. 



Fig. 37 b. A small specimen probably representing the juvenile stage of Productus cherneyensis. 



xl2/5. 



Fig. 38. Productus elegans M'Coy. x 1/1. 



Fig. 38a. A young example. x 1/1. 



Fig. 38b. The same, enlarged. x 2/1. 



Fig. 39. Orthonychia sp. Dorsal view. x 1/1. 



