St. Thome. The perithecia are large and have a very 

 hard wall ; they are dome-shaped and are produced in the 

 bark in large numbers. 



Diagnosis: Perithecia pulvinate or almost hemi- 

 spherical, apparently superficial, but embedded in the 

 bark, black, carbonaceous, with a very thick wall, about 

 I mm. broad ; asci cylindrical, stalked, 120-140 by 13-16 

 microns ; paraphyses filiform ; spores ellipsoid, 4-guttulate 

 and 4-septate, slightly constricted at the septa, yellowish- 

 brown, 22-30 by 9-12 microns. 



BRESADOLA : Revue Mycologique, 1891, p. 68. 



EUTYPA ERUMPENS, MASSEE. 



The death of many trees, including cacao, nutmeg, 

 Barbados evergreen (Ficus sp.) and several forest trees, is 

 reported to be caused by this fungus. It occurs in 

 Trinidad, Barbados and Grenada, and is probably a wound 

 parasite.* 



When a tree is attacked irregular, black patches make 

 their appearance on the bark ; these have a dull, rough 

 surface and consist of the stroma of the fungus in which 

 the perithecia are sunken. The wood of the tree presents 

 a characteristic appearance on examination ; a cut surface 

 of the wood shows irregular, black streaks, running more or 

 less longitudinally, and small, black, roundish patches 

 scattered here and there. The black streaks and patches 

 represent the mycelium of the fungus whose growth has 

 become checked. Figures I and 2 in plate III show 

 respectively the black patches on the surface of the bark 

 and the appearance of the cut surface of the wood of an 

 infected branch. 



Diagnosis : Stroma broadly effuse, forming patches, 

 innate, then superficial, black inside and outside ; perithecia 

 ovoid, often compressed by mutual pressure, '5-'8 mm. 

 broad, ostiole papillate ; asci cylindric-clavate, with a long 

 stalk, 175-200 by 7-8 microns, eight-spored ; spores 

 distichous, cylindrical, subreniform, subacute at both ends, 

 pale olive, 16-18 by 5-6 microns. 



Bulletin of Agric. Inform., Trinidad, No. 61, 1909. 



Eutypa caulivora, Massee, has been reported to occur on 

 the Para rubber plant in the Malay States. It produces a 

 similar effect to the above species, but may be easily 

 distinguished from it by the characters of the spores. 



*Species of the genus Eutypa are generally recognised as being wound 

 parasites. 



22 



