ON THE WORLD'S "LICHENES EXSICCATI". 113 



fasc. I —VI: 1818, VII— VIII: 1819. The collection has 

 written labels. I have not seen fasciculus III. 



Rabenhorst, L. Cladoniae Europaeae. Die Cladonien Europa's 

 in getrockneten Exemplaren. Unter Mitwirkung mehrerer 

 Freunde der Botanik gesammelt und herausgegeben von Dr. 

 L. Rabenhorst. Dresden 1800. There are 35 species distri- 

 buted on 39 tabulae. Generally there are several formae 

 of each species with special numbers. Sometimes one 

 species (with many formae) covers more than one tabula, 

 or one tabula may contain several species (with few formae). 

 Citation is, therefore, difficult, for it is necessary to cite the 

 number of the tabula as well as that of the species and 

 forma, which is not always done. 



Rabenhorst, L. Same, Supplementum I. Dresden 1863. Distri- 

 buted on 11 tabulae, which have no special numbers. The 

 number of the individual labels refers to the tabulae of the 

 „Cladoniae Europaeae", a number of the species is not given; 

 the numbers of the formae are in continuation of the 

 numbers of the „Clad. Eur." for instance: Cladonia macilenta 

 (Ehrh.) Hoffm.: Cladoniae Europaeae Tab. Ill, No. IV, 

 1-9, in the „Supplementum" Tab. Ill, 10—11. (1—11 are 

 formae of this species). 



Rabenhorst, L. Lichenes europaei exsiccati. Die Flechten Europa's 

 unter Mitwirkung mehrerer nahmhafter Botaniker gesammelt 

 und herausgegeben von Dr. L. Rabenhorst. Fasciculi I — 

 XXXVI. Nos. 1—974. Fasc. 1: 1—25, 1855, II: 26—55,1855, 

 III: 56-83, 1856, IV: 84—112, 1856, V: 113—142, 1856, 

 VI: 143-172, 1857, VII: 173-200, 1857, VIII: 201-228, 

 1857, IX: 229-259, 1857, X: 260-310, 1857, XI: 311- 

 336, 1857, XII: 337-364 b, 1858, XIII: 364-389, 1858, 

 XIV: 390-416, 1858, XV: 417-442, 1859, XVI: 443-469, 

 1859, XVII: 470-496, 1859, XVIII: 497-521, 1860, XIX: 

 522-547, 1861, XX: 548-573, 1861, XXI: 574-598, 1861, 

 XXII: 599-624, 1861, XXIII: 625-650. 1862, XXIV: 



Nyt Mag. f. Naturv. LI. II. 191 3. 8 



