( 210 ) 



lacking as well as in llioso of Plale II, althongli this lenn is usual 

 in descriptions of tiie Leptostroniaceae. Tiiei'efore we reinark'tliat tliis 

 latter family of the Sphaeropsideae forms a transition between the 

 perithecium-bearino- and the peritheciumless forms and that in jndging 

 these two cases weight has l)een attached to the bhxck cohiur of the 

 upper half of the shields, wiiich sometimes consists of the cuticle 

 only, sometimes of a combination of the cuticle with the epidermis. 

 ^ In addition to this the Loptostromaceae do not produce well- 

 developed basidia and ha\e remai-kably small spores. 



The Latin diagnosis of Ilymrnopsis Tijphae is as follows: 

 "Sporododiiis am|)higenis, hemis})haericis, inaequaliter in vaginarum 

 sulcis disti-ibutis, majoribus et minoribus, item longioribns et orbicu- 

 laribus intermixtis, |)rimo cuticidam inter et epidermidcm caelatis, 

 1 — 18 ft in diam., atorrimis ; denicpie expositis, calvis, thalamo basidio- 

 phoro basilari praedilis ; basidiis dense fasciculatis, elongato-clavatis, 

 hyalinis, cojitinuis; conidiis oblongis, rectis vel panllo cni-vatis et 

 utplurimnm iiiacqnilateralibus, utriuKpie obtusis, basi vulgo clarioribus, 

 10 X "A."' murinis (Sacc. ('hromotaxia Tab. I, f. 3), 2 — 4-guttulatis, 

 guttulis hyalinis, nunc binis sibi op|)Ositis, tunc iterum ternis (aut 

 quaternis) in scriein dispositis." 



EXPLANATION OF THE FIGURES OF PLATE II. 



Fig. L Piece of a learsliealli of Typliu lull folia, sliulded in llie grooves l)el\veeit 



llie nerves witli sporodoehia (spora = spore; docheion = receplacle), 



(natural .size); p.p. perithecia. 

 „ 2. Piece of a leafsheatJi willi two s))orodocliia, of wliicli one is opened, the 



other closed C'^/i). 

 „ 3. Piece of a leafshealh witji two .sporodoehia, of wliich one has a groove 



on the dorsal side (*Vi). 

 „ 4. Vertical section of a ripe sporodochium. — c.c. cuticle; o.o. epidermis; 



s.s. conidia; rh. vb. vascular bundles; .r. cluh-shaped basidia. 

 „ 5. A bundle of club-shaped basidia (.r. ,/;.) with some conidia (//. y.), in which 



two or three vacuoles. The end of the conidia resting on the basidia 



or turned towards them is always somewhat more transparent than 



the other. 



