284 BERKELEY AND CURTIS, EXOTIC FUNGI. 



42. Xylaria dealbata, B. and C, capitulo elliptico in stipitem cyliudricum dcoi£<um attenuato, toto 

 crustit fragili rigida dealbata tecto. Scleroderma ? Schwein. MSS. 



On dead wood ; Surinam. 



Head elliptic, three-quarters of an incli long half an inch thick, attenuated below 

 into a cylindrical stem ; clothed with a brittle rigid black crust, coated with a thin 

 white wash, which is here and there cracked and discolored. Substance white, firm, 

 corky. 



The specimens are unfortunately immature, and the perithecia not perfected. 



43. X. SCHWEINITZII, B. and C., capitulo elliptico obtuso suberoso compacto, stipite elongate discreto laccato 



Isevissimo parce rimuloso ; peritheciis globosis ; ostiolis sparsis vix prominulis. Sphseria capitata, 

 Schwein. MSS. 

 On dead wood ; Surinam. 



Head very smooth and even except where it is contracted in drying, not the least 

 cracked, black, about three-quarters of an inch long ; stem quite distinct, compressed, 

 brownish laccate, slightly cracked. Sporidia l-750th of an inch long, cymbiform. 



This species agrees in some respects with X. polymorpha, but has a far neater and 

 more even head. It is much nearer to it, however, than to such species as X ohovata, 

 Berk., and X. pilcEformis, B. and C. 



44. X. tabacina, Kickx. Bull, de I'Ac. Brux. vol. viii. tab. ii. fig. 1. Sphaeria marcida, Schwein. MSS. 

 On dead wood ; Surinam. 



The specimens, though several inches long, are immature, and without a trace of 

 perithecia. 



45. X. FUECATA, Schwein. MSS., (sub Sphaeria.) X. corniformis, Mont. 

 On dead wood ; Surinam. 



We have retained for this species the name given by Schweinitz, because Dr. 

 Montague's plant appears to be quite different from that of Fries. The Schweinitzian 

 specimens, on the contrary, are just like those of Leprieur from Guiana. In both, the 

 sporidia are about l-2500th of an inch long. Specimens of X. multiplex from the 

 same locality, which are scarcely distinguishable externally, have the sporidia 

 l-1162dth of an inch long. The specimens from Dr. Montague are perfectly simple. 

 It may be observed that the specimens published as X. corniformis, in the British 

 Fungi, are recognized by Fries in Summa. Veg. Scand. as the same with his species. 



46. X. SCOPIFORMIS, Kze. 1. c. (sub Sphteria.) Sphseria fasciculus, Schwein. MSS. 



On dead wood ; Surinam. 



The specimens are longer than those from Hostmann, gathered in Surinam, or of 

 Leprieur from Guiana. 



47. X. COMOSA, Mont. Ann. de Sc. Nat. Juin, 1840. Sphseria echinocephala, Schwein. MSS, 



On dead wood ; Surinam. This species occurs also in S. Carohna. It is not, we 

 think, a true Fracidia, Fr, 



