140 • THE EKITISH TRUFFLES. 
ing from 1-4 spores. Sporidia ellipsoid, reddish-yellow, densely echi- 
nulate. Odour, when recent, nauseous. " In the youug plant the 
asci are precisely of the form of tliose in CJieiromyces meandriformis^ 
but with age they enlarge, and are at last obovate as in T. cestivum. 
Distinguished from jT. r^^/nr/i by its smooth pale peridium, and the 
veins springing from a distinct, generally single, basal point." — Berk. 
and Br. Ann. N. H. 321. Tuber nitidum, Yitt. Mon. Tub. t. 2. f. 10 ; 
Tul. Fun. Hyp. p. 143. Oogaster nitidus^ Corda Icon. vi. t. 15, 
I 117; Berk, and Br. Ann. Nat. Hist. No. 321; Berk. Outl. Br. 
Pung. p. 376. — Hartham, Budloe, Spye Park, Wilts (C. E. Broome, 
Esq.). 
9, Tiller puhendiim^ B. and Br. — Gregarious ; irregularly sublobate, 
clothed with short erect down, which gives it to the naked eye a pecu- 
liar pearly appearance. The white spots are very visible, even in dried 
specimens. Peridium very thin and delicate, so that the pinky-brown 
colour of the flesh is apparent through it, often cracked. Veins white 
from a radiating base, in some individuals very few. Sporidia nearly 
spherical, reticulato-echinulate. Odour of the radish. — Abundant in 
the neighbourhood of Hanham, near Bristol; Chudleigh ; Aspley near 
Woburn, in sandy districts.— Berk, et Br. Ann. Nat. Plist. Aug. 1846 ; 
Berk. Outl. p. 'd76. 
10. Tuber dryopkilum, Tul. — Gregarious, with little odour, rounded 
usually about the size of a nutmeg, nearly smooth, white, marked here 
and there with darker patches. The peridium is thick, hard, and 
tough, easily parting from the flesh, which is firm, reddish-brown, with 
white interstices, which are given off from different points of the sur- 
face. Sporidia elliptic and coarsely reticulato-echinulate. — Berk, and 
Br. Ann. Nat. Hist.; Aug. 1846; Berk. Outl. p. 376. King's Cliffe, 
Chudleigh, Bristol, etc. 
ExrLAKATio:^ OF Plate XXX. 
Fig. 1. Tuber excaraium, natural size. 2, Seotion of same. 3. Portion 
Tnagnijied, with imbedded asci, 4. Ascus and sporidia, further magnijied. 
5 and 6. Sporidia, magnified. 
