2 PETCH : 



reddish-pink, becoming paler towards the base, and fading 

 (^lightly after expansion ; the head was crimson, sharply- 

 defined from the colom- of the stalk. The gleba was dark 

 olive, with a foetid, but weak odour. 



The surface of the stallc is practically smootli, as will be 

 evident from tlie photograph of the fully expanded specimens 

 figured on Plate III. The wall of the stalk is composed of a 

 single \i\,yer of comparatively small, isodiametric, thin- walled 

 chambers, not arranged in vertical rows ; the waUs of these 

 chambers are not perforated either internally or externally. 

 The head is rugose, being thickly covered with rounded 

 hemispherical or bolster-shaped tubercles. Its lower boun- 

 dary is sharply defined from the stalk by a thickened ring, 

 wliich is more evident on alcohol specimens. In one specimen 

 tliere is a slight constriction of the stalk just below the liead. 



The wall of the head is slightly thicker than that of the 

 stalk, and it differs from the latter wall in being almost soUd. 

 Viewed from the inner surface, it is seen to be pitted witli 

 numerous cavities separated by thick partition walls. In 

 cross section, these cavities are seen to penetrate to about one 

 half tlie thickness of the wall. The protuberances on the 

 outer surface are more numerous than the cavities seen on the 

 inner surface, but some of the cavities are branclied, and thus 

 each tubercle lies over the blind end of a cavity. The struc- 

 ture of the head thus differs altogether from that of tlie stalk, 

 and the cavities of the former beai" very little resemblance 

 to the (chambers of the latter. In an alcoliol specimen, the 

 cliambers cjf the st;ilk are about 2 mms. in diameter, with walls 

 about ()-(»5 mm. thick. The substance of the liead of the 

 same specimen is up to 2-5 mms. tliick ; it is penetrated from 

 the inner surface by cavities 0*25-0 5 mm. in diameter, but 

 these only penetrate to a depth of about a millimetre and are 

 separated from each other by septa about 1 mm. thick. Tlie 

 outer half of the wall of the head is therefore solid ; and 

 tliough the tubercles are situated over the endings of the 

 cavities, they are not hollow. In section the head appears 

 tri have i\, solid wall, half penetrated by narrow tubes; if it 

 (•on8iste<l originally of a .series of chambiMS, their lateral and 

 oiil^r walls liHVo become so thickened that their cavities are 



