144 FETCH : 



in their perforated apex, and in the arrangement of tlie pro- 

 cesses, especially at the base of the head, in a net work. These 

 are just the points ii\ which Mutt wis proximus differs from 

 Jansia elegans. If Penzig's view is correct, then our Ceylon 

 species is Jansia elegans, with whicli it agrees in general 

 appearance and habitat. But if there has been no mistake in 

 the description of the head of Jansia elegans as " imperforate," 

 it would seem preferable to conclude that Mutinus proximus 

 is found in Java, as well as in Cej'-lon, and that Penzig's 

 aberrant specimens belong to this species. Fischer (Untersuch. 

 Phalloid., 1900, pi. 5, fig. 31) gives a figure of a median section 

 of an unexpanded head of Jansia Nymaniana {= rugosa) : 

 it certainly appears from this figure that the apex is perforated, 

 and in his description Fischer says, " am Scheitel abgestutzt, 

 mit einer Miindung " : but Penzig states that the upper ends 

 of his specimens were always closed, and his figures show the 

 netted bands of the head continuous over the apex. The 

 difference of opinion would be comprehensible if both describ- 

 ers had examined dried specimens only, but in this case 

 Penzig's descriptions were presumably drawn up from fresh 

 examples. Lloyd (Myc. notes No. 30) gives a photograph of the 

 head of Jansia rugosa enlarged six times : the apex is truncate , 

 and in this respect differs completely from Penzig's figures. 

 It seems most probable that Penzig's figures are incorrect : 

 the structure which they show is an impossible variation from 

 a perforate apex. 



At present it seems advisable to leave the Ceylon 

 species as Mutinus {Jansia) proximus, with the probability 

 that the head of Jansia rugosa and J. elegans will be found 

 to be perforated, and that one name will suffice for all 

 three. 



Genus 2. Ithyphallus Fries. 



Receptaculum consisting of a hollow stalk with a chambered 

 wall, with a bell-shaped cap attached to the upper end : outer 

 surface of the cap smooth or ornamented with netted bands or 

 minute folds : gleba adhering to the cap when ripe. Apex 

 of the receptaculum perforated (exceptionally closed). 



