166 
constitute a good species. Itis remarkable for ts cartilaginous 
consistence, which is much more tough and hard than in the 
latter. Bowood, in sandy ground under beech trees, Autumn. 
nitidum V7itt. Rudlow, plantations, Autumn. 
puberulum B. and Br. Annals Nat. Hist. August, 1846, 
Hanham, Leigh, Woods, &c. This plant is frequently the 
habitat of Hypocrea inclusa B. and Br., one of the Spheriacei. 
When there it may be detected by a minute, rusty spot in 
the flesh of the Truffle: Tulasne regards it as identical with 
his Tuber rapzeodorum, and observes that other species are 
de 
a 
downy when young. 
T—— dryophilum Tul. Hanham and Lucknam. This species 
comes very close to T—— maculatum Vit, and according to 
Tulasne himself also to T. Borchii Vitt. It is very possible 
that too many species have been made of the Genus; they 
differ so much in the fresh and dry state that the difficulties 
of discrimination are great. | 
T-—— excavatum Vitt. This species occurred at Rudlow so long 
ago as 1843, since which time it has laid accidentally 
unnoticed in my herbarium. Bathford, Leigh Woods, &c. 
T—— Borchii Vitt. A specimen then referred to this species 
occurred near Abbot’s Leigh, Bristol, in 1845. There is still 
no reason to consider it anything else. 
T—— microsporum Vit. A small truffle which seemed to belau 
to this species occurred to the late Dr. Thwaites and myself 
in Stapleton Grove, near Bristol, in October, 1845. The 
grove is unfortunately now destroyed, and I mention the 
circumstance to draw the attention of Bristol botanists to 
that neighbourhood, as the grove was very rich in mycology. 
GENUS 277. CHOIROMYCES.* Vit. 
Common integument even ; base definite ; asci clavate ; 3 Sporidia 
spherical. 
* From choiros a hog; and mukes a fungus, probably from its strong 
odour. 
