(139 ) 
trema and Graphis should offer some, perhaps difficult, points of contact, 
will surprise no lichenist familiar with these exceedingly varied genera ; 
and such species as Graphis reniformis, Nyl. (Lindig Herb. N. Gran. n. 
2651, &c.,) and Thelotrema lirelliforme and T. leiostomum of the present 
writer (Wright Lich. Cub. n. 149, 150) in some at least of their forms, 
may be said to suggest, if they are not examples of, such approx- 
imation. ButIshall venture to go farther. 7. lewcastrum, Tuckerm. 
Obs. Lich. 1. 6. 6, p. 269 (Wright Lich. Cub. n. 158) is not to be denied 
affinity of a very close kind to 7. platycarpoides of the same memoir 
(Lich. Cub. n. 157) and to T. platycarpum (Lich. Cub. n. 139) of an earlier. 
And in this case, and in view especially of such forms as T. leucastrum, 
v. difforme (Lich. Cub. n. 159) not to speak of such as T. schizostomuns 
of the same memoir (Lich. Cub. n. 138) and T. chionostomum, Nyl. (Cuba, 
Wright) it is for me impossible to exclude from the same generical affin- 
ity, several species now referred, and by very high authority, to Graphis. 
Among these, — which include also T. syngraphizans (Nyl. sub Graphide, 
in litt.) from the Bonin Islands (Wright) comparable at once with 7. lirel- 
liforme and T. leucastrum, but nearest to the former, and T. albo-roseliwm 
(Nyl. sub Graphide, in Prodr. N. Gran. p. 87. Lindig Herb. n. 2694) sug- 
gesting, from every point of view, a comparison with Thelotrema platy- 
carpum and its nearest allies, —is here to be named 7. leprocarpum (Ny]l. 
sub Graphide, in Prodr. Fl. N. Gran. p. 85, note) from Bald Cypress, 
Louisiana (Hale). This last has the habit of the Graphis above cited, and 
of the Thelotrema-group with which it was compared, as also of T. schia- 
ostomum; but differs from all these in its large, muriform spores.—— 
T. Auberianum, Mont., the centre of a group of varying conditions illus- 
trated in part by the writer in Wright Lich. Cub. n. 145-148, has been 
sent to me from Florida.——T. Santense, Tuckerm. Obs, Lich. 1. c. 5, p. 
406, remarkable as well for the isidioid branchlets, into which its thallus 
tends most readily to pass, as for its large, urceolarizform apothecia, was 
discovered, on Elm, in South Carolina (Mr. Ravenel) and has since 
occurred only in Alabama (Mr. Beaumont).——T. glaucescens, Nyl. in 
Prodr. Fl. N. Gran. p. 47, note) is a small species of the same near 
affinity with the last, and very close to 7. compunctwm (Ach.) Nyl. 
(Wright Lich. Cub. n. 152). It has been found in South Carolina (Mr. 
Ravenel) Southern Alabama (Mr. Beaumont) and Louisiana (Hale).—— 
T. Ravenelii, Tuckerm. emend. (Nyl. in Prodr. Fl. N. Gran. p. 50, note) 
occurring in South Carolina (Mr. Ravenel) and Alabama (Mr. Peters) is 
distinguishable from the next following species by the absence of the 
scattered, scarlet granules within the crust, as by the more open and 
better margined apothecia, but scarcely by the spores; and its rank is 
uncertain.—T. Wightii, Nyl. Endocarpon, Tayl. Thel. Ravenelii, Tuck- 
erm. Suppl. 1, ]. c. p. 426, pro p.) inhabits the whole low country of the 
South, from South Carolina (Mr. Ravenel) to Texas (Ravenel). 
