186 Prof. Santo Garovaglio on the Species of 
in furfurem soluto, ad lentem subdiaphano ; epithecio integro, 
rarius dimidiato; sporis magnitudine varus. 
7. V. hydrela, Ach.= Moug. & Nest. 952; Scher. Exs. 521; 
Anzi, Lich. rar. Ven. 153. V. levata, Leight. Ang. Lich. t. 19. 
fol. 
Subspecies :—V. submersa, Scher. (non V. submersa, Borr. 
teste Leightonio Ang. Lich. p. 62). V. papillosa, Rabenh. Exs. 
572. V. chlorotica, Hepp. 94. V. hydrela, Gwackh. 29a. V. 
submersa, Hepp. 93. V. eleeina, Scher. Exs. 590. V. acro- 
telloides, Mass. 23. V. mucosa, Lieb. Ard. 317. Pyrenula 
Funckii, Funck, Crypt. 658. —Lithoicea eleomelena, Rab. 333 ; 
Anazi, Lich. rar. Ven. 153. 
Cohors IV. 
Thallo jam primitus tartareo-areolato, subsquamosulo, crassius- 
culo; apotheciis junioribus velamine thallodico, mox detrito, 
tandem in furfurem soluto evanidove, magis minusve obductis ; 
epithecio integro vel dimidiato, interdum juxta basin a tunica 
sejuncto; sporis magnitudine variis. 
&. Wi mgrescens,, Vers. — Weight: Ang. Iich-yt. 27. tole 
Hepp. 433 & 434; Moug. & Nestl. 1065; Scher. Exs. 439 & 
284; Massal. Exs. 172 & 21; Leight. Ang. Lich. t. 23. f. 2? 
Anzi, Lich. rar. Ven. 158. 
A most variable ing, 
submersa, and, on the other, into V. macrostoma. 
V. maura, Wahl., has an affinity with V. nigrescens, but is dis- 
tinguished by the epithecium being thick and coalescent at the 
base. 
V. Leightonii, Hepp, n. 95, though a remarkable plant, yet 
seems scarcely distinct from a var. of V. nigrescens. 
Subspecies 1. V. collematodes, Garov. Thallo tartareo, orbi- 
culari-determinato vel subeffuso, rimoso-areolato, subsquainaceo, 
areolis crassiusculis, m sicco planis, discretis, sordade castaneo- 
fuscis, madore in massam contiguam, verrucoso-rugulosam, fere 
eelatinosam turgescentibus, coloris olivaceo- renin ee apotheciis 
infrequentibus, vix perspicuis ; epithecio tunic concolori arcte 
herente, et subtus nucleum producto; sporis 0°0171 usque 
0:0185 millim. longis, 0-°0071-0:0085 latis. 
On the stones of breakwaters. 
Subspecies 2. V. macrostoma, Duf.=Leight. Ang. Lich. t. 21. 
f. 4; Mass. Exs. 194 a, B, 21 & 195; Anzi, Lich. rar. Venet. 
159 & 160; Leight. Lich. Brit. Exs. 229; Ang. Lich. t. 21. 
fe 
9. V. tristis, Kremp.= Mass. Ale. Lich. t. 4. f. 12-16; Anzai, 
Lich. rar. Long. 241. 
