CRYPTOGAMIA. LIGHENES. 85 



4f8. Ulva. 



1 latissima. On the shores of Long-Island. 



2 purpurea. With the former, 



3 intestinalis. In ditches. 



4 lactuca. In salt water. 



5 lubrica. In ditches. 



479. Nostoc. 



pruniformc. Agardli. Synop. Alg. Scand. p. 134. 

 In fresh water ponds. New-Jersey. Oct. Cumberland. 



LICIIENES, according to Acliarius- 



480. Arthonia. 



punctiformis. On the branches of trees. 



481. Lecidea. 



1 immersa. On rocks. 



2 incana. Syn. Mcth. Lich. 

 Lepraria incana. Lich. Uniev. 



On the bark of old trees. 



3 muscoruni. In woods on moist ground. 



4 sabulaetorum, B. geochroa. Meth. Lich. 

 muscorum, B. geochroa. Lich. Uniev. 



On the steatitic hills, Staten-Island. 



5 icmadophylla. On the trunks of trees. 



6 alba. On the trunks of trees. 



482. Gyrophora. 



1 papulosa. 



Umbilicaria pustulata. Mx. 

 On rocks. Fort Washington. 



2 vellea. 



Umbilicaria vellea. Mx. 

 On rocks. 



483. Calicium. 



1 turbinatum. On the stumps of decaying oak trees. 



2 stigonellum. With the preceding. 



484. Graphis. 



1 scripta. On the smooth bark of trees. Betula, &c. 



485. Verrucaria. 



stigmateJla. On the trunks of trees. 



486. Endocarpon. 



miniatum. On wet rocks. Patterson falls, 



487. Porina. 



pei'tussa. On the trunks of trees. 



488. Variolaria. 



1 communis. On the bark of trees and on rocks. 



2 amara. In similar situations. 



489. Lecanora. 



1 parclla. On rocks. 



2 subfusca. On the trunks of trees. 



490. EVERNIA. 



prunastri. On the trunks of trees. 



