CALIFORNIA ACADEMY OF SCIENCES. 45 



of attachment, pi 48 X 30; paraphyses agglutinate; sporidia 

 hyaline, of two opposed, rather long, equal cones, occasion- 

 ally again divided, so as to make the spore 3-septate, sur- 

 rounded by a gelatinous stratum. y« 32 — 40 X 8 — 10. 



On dead stems of Dendromecon rigidum. Tamalpais, 

 March. 3083. 



Chaetosphseria ornata. 



Perithecia superficial, orbicular, black, not rugulose, }x 360; 

 seta? hyphoid, \ mm. or more in length, black, not acumi- 

 nate, occasionally septate; asci 8-spored, mucoid, clavate, 

 with a long pedicel filled with oil globules or granules, 

 }x 8 — 10 X 100; paraphyses hardly visible; sporidia fusiform, 

 tri-septate, middle cells olive-brown ultimate ones hyaline. 

 M 16 X 6. 



On decaying bark of Eucalyptus. San Francisco, Sept. 



2845. 

 Pleospora compressa. 



Perithecia scattered, covered by the blackened cuticle, 

 concave, surrounded by radiating brown hypha; asci 8-spored 

 clavate, 2-seriate, short-btipitate, /u 80 — 90 X 15 — 18, para- 

 physes filiform; sporidia brown, unequally elliptic, transverse- 

 ly 3-septate, the two central cells constricted by a longitudinal 

 septum which flattens them antero-posteriorly, and causes 

 the central cells of the spore to appear narrower than the ulti- 

 mate ones when view r ed from the side; at first surrounded by 

 •a mucoid envelope. // 20 — 27 X 10 — 19. 



On dead stems of Polygonum polymorphum. Blue Canon, 

 June. 3284. 



Pleospora (Catharinia) argyrospora. 



Perithecia minute, black, erumpent, sparse; asci 8-spored 

 clavate, sessile, thick-walled, jn 60 — 65 X 20; bi-seriate ; 

 paraphyses filiform; sporidia hyaline, elliptic-lanceolate, 

 transversely 3 — 5, longitudinally 1 — 2-septate, fx 18 X 8. 



On dead branches of Dendromecon rigidum. Tamalpais, 

 March. 3084. 



