the Dillenian Herbarium. 109 



two specimens, both long and narrow pieces, the one of U. lac- 

 tuca, the other of U. umbilicalis. 



7- U. intestinaMs in many different stages. 



8. Several specimens of U. compressa, unbranched, varying in 

 thickness : these do not agree with the figure. 



Q. Fucus opuntla. Linn. Trans. 



10. U. incrassata. Fl. Ang. — Dr. Roth has quoted this to his 

 Rivuhtria Cornu damce, but it belongs to his R. endivifolia. 



11. It would be difficult to determine what Dillenius really in- 

 tended by this number: there are three specimens; one, Conferva 

 gclatinosa @>; a second, called "green," C. confragosa; and a third 

 marked " var." Ulva plumosa. 



12. U. crispa. Fl. Scot. 



13. I have no means of ascertaining how far this is the U. cor- 

 nuta of Lightfoot; but I am almost certain it is no Ulva, but 

 either a Tremella, or, what I rather incline to think, a Clavaria. 

 It does not bear the slightest resemblance to Jungermannia pin- 

 guis, of which Hudson suspected it might be a variety. 



The four remaining species enumerated by Dillenius undoubt- 

 edly belong to the genus Tremella ; and I, therefore, from a con- 

 sciousness of my ignorance in that tribe, decline offering an opi- 

 nion upon them. 



USNE^. 



No. 10. Lichen chali/beiformis. Linn. — It does not appear to 

 differ in any respect from No. 7., which is L.jubatus. 



16". Under this number is preserved only the narrow orange- 

 coloured Lichen vulpinus, Avhich grows in England. That which 

 is known under this name in Germany, and which has lately been 

 found by my valuable correspondent Dr. Fliigge, with fine dark 



shields, 



