III. +Cardiocarpales+ 332–356 =Cardiocarpus= 338–340; =Cyclospermum= 340, 341; =Cycadinocarpus= 341; =Rhabdocarpus= and =Rhabdospermum= 341–345; =Mitrospermum= 345, 346; =Diplotesta= 346; =Leptocaryon= 346, 347; =Taxospermum= 347; =Compsotesta= 347, 348; =Samaropsis= 348–354; =Cordaicarpus= 354–356. IV. +Miscellaneous Seeds+ 356–365 i. =Hexagonocarpus= 356,357; =Decagonocarpus= 357; =Polypterocarpus= 357, 358; =Rhynchogonium= 358–360; =Boroviczia= 360; =Diplopterotesta= 360, 361; =Musocarpus= 361; =Holcospermum= 361–363. ii. =Malacotesta= 363; =Thysanotesta= 364; =Carpolithus= 364, 365; _Microspermum_ 365. CHAPTER XXXVI CYCADOPHYTA (+Fossil+). Pp. 366–420. =BENNETTITALES= 367–420 =Cycadeoidea= 367–417 =Cycadella= 417, 418 =Amphibennettites= 418 =Vectia= 419, 420 CHAPTER XXXVII =BENNETTITALES= (_continued_) 421–477 =Williamsonia= 421–463 =Wielandiella= 463–467 =Williamsoniella= 467–473 =Cycadocephalus= 473–475 =Weltrichia= 475–477 CHAPTER XXXVIII CYCADOPHYTA. Pp. 478–506. i. =Bucklandia= 480–490; =Cycadeomyelon= 490, 491; =Colymbetes= 491–494; =Cycadeolepis= 494–496. ii. =Carpolithus= 497–500; =Cycadospadix= 500, 501; =Beania= 502; =Zamiostrobus=, =Cycadeostrobus= 503–505; =Androstrobus= 505, 506. CHAPTER XXXIX CYCADOPHYTA (+Fronds+). Pp. 507–591. I. +Bennettitales+ 512–566 =Ptilophyllum= 512–529; =Zamites= 529–537; =Otozamites= 537–545; =Dictyozamites= 546–548; =Pterophyllum= 548–558; =Cycadites= and =Pseudocycas= 558–566. II. +Nilssoniales+ 566–587 =Nilssonia= 566–578; =Ctenis= 578–583; =Pseudoctenis= 584–587. III. +Incertae sedis+ 587–591 =Sphenozamites= 587–589; =Plagiozamites= 589, 590; =Cycadorachis= 590, 591. +List of Works referred to in the Text+ (Vols. III & IV). 592–639