Manchester Memoirs, Vol. /vi'i. (igiT,), No. ^. 5 



LenianecB. There are, however, signs of the production of 

 structures which may be undeveloped perithecia or dis- 

 organised pycnidia." The genus Leptospharia is stated 

 to be "rich in all forms of conidia" (lo). 



P\cnidia have been described by Cotton (5; in the 

 marine form L. chondri, and they are known in terrestrial 

 species of the genus. In L. LenianecE J have found 

 neither conidia nor pycnidia, and it is probable that the 

 structures noted b}' \\'oronin were immature perithecia as 

 suggested. 



A summary of Woronin's account of the development 

 of the perithecium ma\' be given : — " A h\pha swells at 

 its tip and the globular termination is cut off b\' a wall, 

 A dilated hypha from the same m)'celium applies itself 

 to this archicarp. The next stage of development was 

 not seen, but from analogy with Erysiphe, I'ezizese and 

 Ascoboli (6), (7), it was inferred that the club-shaped 

 h\-pha is cut off by a wall, and that by continued growth 

 and repeated branching the entwining hypha^ finally form 

 a mass of tissue complete!)' enclosing the globular ter- 

 minal cell or archicarp. The tissue early develops, the 

 walls cells becoming polyhedral b\- pressure, and assuming 

 a brown coloration. The internal tissue of indistinct 

 small cells forms the so-called perithecium nucleus, which 

 later develops into asci. Paraplyses are absent." 



De l^ar)' (8; remarks of this — "incipient sporocarps 

 or archicarps, of doubtful character, and requiring a fresh 

 examination, have been assigned by Woronin to Spharin 

 LejiiatieiS." 



In macerations it was found, though rareh', that two 

 hyphffi were applied to one another, and that adjoining 

 slightly dilated cells terminal or intercalary, or terminal 

 with intercalary, shewed the appearance of fusion. 



