249 



APPENDIX. 



The following are additions to the Collection since the Catalogue was 

 prepared. I have also added a few references, inadvertently omitted from 

 their proper places : 



EQUISETACE^E. 



CALAMITES, Snckow (ante, p. 22). 



Remarks. From the evidence brought forward by Weiss in his Stein kohlen- 

 Calamarien, pt. ii.,* it seems now clearly settled that though the members 

 of the genus Calamites with thin barks are furrowed on their outer sur- 

 face, those with a thick cortical envelope have a smooth exterior : the latter 

 I previously placed in Calamitina, Weiss,f treating that genus as distinct from 

 Calamites. 



Weiss now regards his Calamitina more as a well-marked division of the 

 genus Calamites than as a distinct genus. This, perhaps, in the present state 

 of information, is the best course to take, b\it it is extremely probable that 

 the genus Calamites will eventually require to be broken up into several 

 genera. 



Calamites ramosus, Artis, sp. 



Calamites ramosus (ante, p. 26). 

 Calamites (Eucalamites) ramosus. 

 Weiss, Steinkohlen-Calamarien, pt. ii. p. 98, pi. iii. fig. 3, pi. v. figs. 1, 2, 



pis. vi. and vii. figs. 1, 2, pi. viii. figs. 1, 2, 4, pi. ix. figs. 1, 2, pi. x. 



tig. 1, pi. xx. tigs. 1, 2. 



Calamites varians var. (ante, p. 31). 



Locality (additional). Foreign. United States : Pennsylvania. 



CALAMOCLADUS, Sch.im P er (ante, p. 38). 



Calamocladus equisetiformis, Schlotheim, sp. (ante, p. 38). 

 Locality (additional). Foreign. Westphalia : Langendreer. 



* Weiss, in Abhandl. z. Geol. Specialkarte Preussen u. d. Thiiringischen Staatcn. 

 Band v. heft 2, Berlin, 1884. 



1 am very sorry that I have been unable to avail myself of this valuable addition 

 to the literature of the Calamari<e in the preparation of the earlier pages of tins 

 catalogue. 



t Steinkohlen-Calamarien, pt. i. p. ] 26, 1876 (Abhardl. z. Geol. Specialkaite 

 Preussen u. d. Thuringischen Staaten. Band ii. heft i.). 



