LICHENS IN SOWERBY'S HERBARIUM. 47 



veloped condition, or the condition of beginning of a new division, 

 I [Prof. Reinsch] do not venture to decide ; the dimensions as in a 

 four-celled family of the ordinary form. 



F. 9. Tetrapedia Crux- Michaeli (Reinsch) — an individual in 

 the state as observed, showing the division furthest advanced. 



F. 10. Side view of the same individual. 



F. 11-12. Tetrapedia Reinschiana (Arch). Front or broad view. 



F. 13. The same. Side view. 



F. 14-16. Tetrapedia setigera (Arch). Front or broad view. 



F. 17. The same. Side view. 



(Fig. 18 represents an example of the spore and adjacent hetero- 

 cysts of a minute Nostoc, the subject of a communication in No. 1 

 (p. 10) of this Journal.— W. A.) 



LICHENS IN SOWERBY'S HERBARIUM. 



The Rev. J. M. Crombie, M.A., F.L.S., commenced in the 

 " Journal of Botany" for August a series of papers on the Lichens 

 contained in Sowerby's Herbarium, illustrative of the figures in 

 11 English Botany," viz : — 



1. Lichen plicatus. E. B. t., 257.== Vsnea barbata, var. plicata. 



2. Lichen ochroleucus. E. B. t., 2374 = Alectoria ochroleuca. 

 Ehrb. 



3. Lichen sarmentosus. E. B. t., 2040. = Alectoria Cincinnata. 

 Fr. 



4. Lichen jnbatns. E. B. t., 1880. = Alectoria jubata. L. The 

 upper figure usually referred to var. chalybeiformis, L., as in Hook. 

 Br. Fl. ii., p. 227, seems rather to belong to var. lanestris, Ach. 

 " A smaller state, with shorter and more slender branches, densely 

 entangled." No specimen, however, is extant in Sow. Herb., either 

 of this or of true chalybeiformis. 



5. Lichen lanatus. E. B. t., 846. = Alectoria lanata. L. The 

 middle figure may be accepted as the type. The upper figure 

 represents a good variety = var. parmelioides. Cromb. MSS. To 

 the typical form, as a young condition, is also to be referred Lichen 

 scaber. E.B. t., 2318. 



G. Lichen stictoceros. E. B.t.,lS53. = Evernia prunastri, var. 

 gracilis. Ach. 



7. Lichen fastigiatus. E. B. t., 890- = Ramalini fastigiata. P., 

 and liamalina fraxinea, Q. The lower left hand figure = R. fas- 

 tigiata. Of the two other figures, the upper is a smaller state of 

 R. fraxinea, and the lower apparently a hybrid between them. 



8. Lichen pollinaxius. E. B. t., 1C07. = Ramalina evernioides. 

 Nyl. 



9. Lichen pinastri. E. B. t., 211. = Platysma junipcrinum* pi- 

 nastri. Appears by a note to have been figured from a specimen 



