35-39. Nacospatangus gracilis A. Ag. 



35. Valve of globiferous pedicellaria. X 95. 



36. Side view of valve of globiferous pedicellaria. X 95. 



37. Side view of tip of valve of globiferous pedicellaria. X 290. 



38. Valve of triphyllous pedicellaria. X 95. 



39. Valve of tridentate pedicellaria. X 95. 



40-43. Nacospatangus depressus H. L. Clark. 



40. Valve of tridentate pedicellaria. X 95. 



41 . Valve of globiferous pedicellaria. X 95. 



42. Side view of valve of globiferous pedicellaria. X 95. 



43. Side view of tip of valve of globiferous pedicellaria. X 290. 



44-46. Palaeotropus thomsoni A. Ag. 



44. Blade of valve of rostrate pedicellaria. X 95. 



45. Stalk of rostrate pedicellaria. X 95. 



46. Valve of tridentate pedicellaria. X 95. 



