116 Mr. J. Morris on recent and fossil Cycadece. 



Z. megdlophyllus^ y Presl, /. c. p. 196. Cyc. meg., Buckl., Mantellia 



nidiformis, Brong. Prod. p. 96. Oolite, Isle of Portland. 

 Z, microphyllus, Presl, I. c. p. 196. Ci/c. micro., Buckl. Oolite, 



Isle of Portland. 

 Z. pygm(Eus, Cycadites, Lindl. and Hutt., 2. t. 143. Lias, Lyme 



Regis. 

 Z. ? Brongniarti, Presl, /. c, p. 196. Endogenites echinatus, Brong., 



Class. Veg. Foss., p. 43. t. 5. f. 2. Soissons. 



Strobiles. 

 Z. crassa, Lindl. and Hutt., 2. t. 136. Wealden, Isle of Wight. 

 Z. macrocephala, L. and H., 2. t. 125. Greensand, near Deal. 

 Z. ovata, L. and H., 3. t. 226 a. Greensand.? Feversham. 



Fronds. 

 Pinnie contracted at the base. 

 Z. distans, Presl, I. c. p. 196. t. 41. f. 1. Keuper, Bamberg. 

 Z. lanceolatus, L. and H., 3. t. 194. Low. Ool. Shale, Haiburn 



Wyke, Yorkshire. 

 Z. undulatus, Presl, /. c. p. 197. Odontop. undulatus, Sternb., pt. 5. 

 and 6. p. 78. t. 28. f. 1. 



Pinnse broad at the base. 

 Z. gigas, Lindl. and Hutt., 3. t. 165. Ool. Shale, Scarborough. 

 Z. ? giganteus. Hist. Let. Suec, t. 33. f. 5. 



Z. ? Schlotheimii, Presl, /. c. p. 200. Cyc. zamiafolius, Sternb., pt. 4. 

 p. 33. t. 43. f. 2. C. M. Mannebach. Poacites zeeeformis, 

 Schloth. Pet. t. 26. f. 1, 2. 

 Z. palmatus, Cycadites, Sternb., pt. 1 — 4. t. 40. f. 1. 

 Z. longifoUus, Brong. Prod. p. 94. Cycadites sulcicaulis, PhiUips, 

 Geol. Yorkshire, pt. 1. t. 7. f. 21. Ctenis falcata, Lindl. and 

 Hutt., 2. t. 103. Ool. Sh., Gristhorpe Bay. 

 Presl considers this to be a Fern. 



Ptilophyllum. 



Stem ? Fronds pinnate ; pinnse linear, closely approximated, 



more or less elongate ; base variable in form, oblique, round, imbri- 

 cate, sometimes auricled in the upper and sometimes in the lower 

 part. Veins slender, equal, parallel f. 



* Presl has placed these fossil stems with Zamites, to which they appear 

 to have a greater affinity than to Cycadites, more especially since the inter- 

 esting discovery by Mr. R. Brown of the existence of scalariform vessels with- 

 out discs in the trunk of Z. microphyllus, a character in which they agree 

 with the American portion of the recent order. Mr. Brown remarks, " that 

 the order Cycadeae presents but one genus in America, namely, the Zamia, 

 on which this genus was originally founded, and to which it has been re- 

 cently restricted ; and that the coincidence in the structure of the scalari- 

 form vessels in the trunk of this Zamia of the new world, with that of the 

 fossil Cycadites of Europe, is very remarkable." (Buckl. B. T. Sup. Notes.) 



\ I am indebted to Mr. Lonsdale, of the Geological Society, for first 

 pointing out to me some fossils from Cutch, belonging to Col. Grant, in 



