Figs. 40-42. CENTRONELLA ( > ) EMACIATA Rowley p. 242 



Pedicle, lateral and brachial views of a nearly perfect specimen, the 

 holotype. (R. R. R.) 



Burlington white chert, Louisiana, Missouri. 



Figs. 43-55. DIELASMELLA COMPRESSA Weller p. 280 



43-44, 45-46, 47-48, 49-50. Pedicle and brachial views of four differ- 

 ent specimens. 51. Pedicle view (x4) of specimen figured in 

 Figs. 49-50. 52-53. Pedicle and brachial views (x4) of speci- 

 men figured in Figs. 45-46. 54-55. Pedicle and brachial views 

 (x4) of specimen figured in Figs. 47-48. (W. M., No. 11347.) 

 Glen Park limestone, Glen Park, Missouri. 



70 



