Messrs. Berkeley and Broome on British Hypogceous Fungi. 79 



nity of examining fresh specimens of Hydnobolites, it appears that 

 our truffle does not belong to the same genus ; the asci of the 

 one being very short and sacciform, of the other linear and dis- 

 posed in a single row ; the sporidia in Hydnotrya moreover are 

 not echinulate. 



Corda has communicated a species under the name of Hydno- 

 bolites carneus, which is eaten in great quantities at Prague under 

 the name of Czerwena Tartoffle. We do not know how he di- 

 stinguishes it as a species. 



11. Spharosoma ostiolatum, Tul. MSS. Near Bristol, under 

 leaves amongst loose mould. 



Only two or three individuals of this curious production have 

 been met with. One was quite young and resembled very closely 

 authentic specimens of Spharosoma fuscum, Klotzsch, but differ- 

 ing in having a cavity within round a central core. The adult 

 plant, instead of being subglobose, nearly even and of a washy 

 brown, is strongly plicate and of a rich mulberry-brown. Klotzsch 

 appears to have seen his species in every stage of growth y we have 

 no hesitation then in considering ours as distinct. It is possible 

 too that it may not be the same as that of Tulasne, but at any 

 rate it agrees in general appearance, and we have not sufficient 

 materials to speak decidedly. 



There is not the least trace of peridium in any stage of growth, 

 the genus being to the sporidiferous series precisely what Guat- 

 teria (the analogue of Sparassis) is to the sporophorous. 



A very curious circumstance sometimes occurs, viz. that there 

 is more than one stratum of hymenium. I know of no similar 

 instance in sporidiferous fungi. The asci are much shorter than 

 the paraphyses. 



*Pachyphlceus melanoxanthus, Tul. Fung. Hyp. /. c. Choiromyces 

 melanoxanthus, Tul. and Berk. Ann. and Mag. of Nat. Hist. vol. xiii. 

 p. 359. 



This species has occurred at King's Cliffe near Bristol and in 

 Devonshire since its first publication, and is probably generally 

 diffused. The peridium is black in every stage of growth. The 

 genus is very properly separated from Choiromyces, with which 

 it does not at all agree in habit. We have the pleasure of adding 

 two new species. 



12. P. citrinus, Berk, and Broome. Subglobosus verruculosus 

 peridio fusco citrino-pruinato apice vivide citrino, intus flavidus 

 interstitiis citrinis floccosis, basi radicante. In woods near Bristol, 

 Wiltshire and Devonshire. 



Very nearly allied to P. melanoxanthus, which is however black 

 in every stage of growth, and has but little odour, whereas P. ci- 

 trinus is densely powdered with lemon- coloured particles, and has 

 a strong smell like that of rotting sea-weed. The orifice is ge- 



