FROM THE SECONDARY ROCKS OF BRITAIN 





693 



Another specimen is described as "a circular disk, which gives rise to a series of about 

 twelve long lanceolate bracts or leaves, striated, approximate at their base, and separate at 

 their apices," and is probably the female spadix. The foliage associated with these i ssils 

 described under the name Palceozamia Cutchensis, Morris, is very near to //'. Pec/ 

 and agrees with that and the other species of WilUamsouia in haying the Moments 

 attached by the centre, with free basal margins. The stems also are Blender and ci linilri- 

 cal, covered with the tumid cicatrices of the petioles, and agreeing in form and arran« - 

 ment with the specimen of the stem of W. Gigas which I examined in the Cambridge 

 Museum. The stems are described as having, at irregular intervals, bands of smaller 

 scars. A specimen in the British Museum shows one of these bands, which have been 

 produced by scales or aborted leaves, that were most probably borne on the main stem, 

 below the origin of the peduncle. 



Emmons has described 1 a rich Cycadean flora from the Atlantic slope of North Caro- 

 lina, which, he considers to be of Triassic age, but which seems to me more probabh 

 Jurassic. Among these remains he describes leaves, stems, and disks which probahb 

 "belong to this genus : but specimens, or at least more accurate drawings, arc needed before 

 any satisfactory judgment can be formed regarding them. 



WlLLIAMSONIA GlGAS, CaiT. 



1822. 



ff 



Geology 



1837. Zamia Gigas, Lindl. & Hutt. Fossil Flora, pi. 165. 



Morr 



Miquel 



1849. Podozamites Gigas, Brongn. Tabl. Genr. Foss. p. 62. 

 1838. Odontopteris falcata, Sternb. Fl. d. Vorwelt, fasc. v. 

 1838. Zamites falcatus , Presl, Sternb. Fl. d. Vorw. fasc. vii 

 1841. Ptilophyllum falcatum, Morris, Ann. Nat. Hist. vii. f 

 1843. Palceozamia falcata, Morris, Cat. Brit. Foss. p. 15. 

 1849. Podozamites falcatus, Brongn. Tabl. Genr. Foss. p. 1! 



1828. Zamia Mantellii, Brongn. (nomen), Prodr. p. 94 (fide Brongn. laoi. ^., v . 



Leaves large, lanceolate, or ovate acuminate, attenuate at the base; segments nnmerou 



closely approximated, but not touching, lanceolate acuminate, snbialeate at the ap,* 



«*»•_ ^™i. JL.il j .iMtfv dWcatiii* into the free margma of tiie base. 



many, simple, parallel, slightly div 



This species forms the subject of Professor Williamson's exhau> ire memoir, and 



fully illustrated in the accompanying plates. 



From the Inferior Oolite, near Scarborough, Yorkshire. [British Museum, &cj 



W. hastula, Carr 



MS 



Journ 



1829. Cycadites pectinoides, Phillips (non Sternb.), GedL of Yorkshire, p. 125, pi. I. • _ 



T_ ,. ...,._„ ^a M,w moments numerous, lmeai-lan< ( out 



Leaves linear-lanceolate, attenuate above and below; seg 



* American Geology, part vi. pp 



5e 2 



