350 49. Olivia. 2. THALASSIOPHYTAE. Pl.cell.aph . 
3. Olivia cinerea. Ashcoloured olivi. 
Thalli very minute, roundish, ash-grey, aggregated into 
a powder crust. 
Byssus saxatilis, Withering Bot. Arr. erf. 2. 
Lichen cinereus, With . Bot. Arr. eel. 4. 
Limestone-rocks and stones. 
4. Olivia nigra . Black olivi. 
Thalli very minute, roundish, dull black; aggregated 
into a black powdery crust. 
Byssus antiquitatis, Lin. S. P. ? 
Lepraria nigra, Turn, and Borr. Lich. Brit. 1,21? Eng. Bot. 2409. 
Tops of oak-posts and old wood. 
5. Olivia violacea. Violet olivi . 
Thalli minute, ovate, dull red, aggregated into a reddish 
crust. 
Byssus lolithus, Lin . 8. P. 1638. 
Lichen lolithus, With. Boi. Arr. 4, 3. 
Lichen rubens, Acharius Meth. Lich. G. 
Lepraria lolithus, Achar. Meth. 8; Engl. Bot. 2471. 
St. Winifred's blood , in the Holy-well, Cheshire. 
Bark of trees, rocks and stones in springs. 
Crust dull crimson, smells like violets, or orrice-roots. 
6. Olivia cruenta. Bloody olivi. 
Thalli minute, ovate, red, aggregated into a dark red, 
gelatinous crust. 
Tremella cruenta, Engl. Bot. 
Bottom of walls in damp places. 
F. LiNCKiDEiE. Thallus continuous; integuments mem- 
branaceous, smooth; inside fleshy, cellular, slippery ; spo - 
ridia in beadlike filaments sunk in the substance of the 
thallus. — Green or brownish, not becoming black. 
XXV. 50. CARRODORUS. Carrodori. 
Thallus long, branched, brownish ; sporidia elliptical, in 
anastomosing lines. — Marine, foetid, slippery. 
Carr odor us foe tidus. Stinking carrodori . 
Thallus pale olive, branched ; branches crowded, acute. 
Conferva foetida, Villars Dauph. 3, 1010 ; Dillw. Conf, 104; Engl. Bot . 
2101. 
Ulva foetida, Voucher Conf. 285. 
