Mr. W. Mitten on the Mosses and Hepaticce of Sussex. 363 



nervo evanescente [raro excurrenti] acuminata ; theca globoso- 

 ovalis recto-apiculataobtusa immersa superne brunneo-purpurea ; 

 calyptra tenerrima basi lacerata longi-apiculata." — C. Miiller } 

 Synops. p. 32; Bryol. Eur op. fasc. 42. Ephemerum, t. 1. 



On the exposed mud of the large pond at Pondleigh near Hurstpier- 

 point ; more plentiful some seasons than others, according as the pond 

 is more or less dried up ; large quantities often remaining in the con- 

 fervoid state without developing leaves or capsules. 



Closely resembling E. serratum in size and habit, but readily di- 

 stinguished under the microscope by its nerved leaves, which are also 

 rather wider. The nerve is very variable, being sometimes promi- 

 nent, at others requiring a transverse section to be made of the leaf 

 before it is visible, and sometimes it appears more strongly denned in 

 the upper part of the leaf than in the lower. 



In the second review of the species of this genus in * Bryologia 

 Europsea,' Ephemerum cohcerens is stated to be found in " Anglia oc- 

 cidental!," but it is not known to have been gathered in any other 

 locality besides the one above given. 



120. E. sessile (B. et S.),C. Miiller; Bryol. Europ. fasc. 42. t.2. 

 Phascum crassinervium, Bryol. Europ. 



P. stenophyllum, Voit. Wils. in Eng. Bot. Suppt. t. 2829. 

 In small quantity on Henfield Common, and by the large pond at 

 Pondleigh. 



Genus 2. Ephemerella, C. Miiller. 



121. E.pachycarpa (Schw.), C. Miiller. 



Phascum crassinervium, Wils. in Eng. Bot. Suppl. t. 2932. 

 Frequent in stubbles. 



Genus 3. Physcomitrium, Brid. 



122. P. patens (Hedw.), Mitten. 

 Ephemerum patens, Hampe, C. Miiller. 

 Physcomitrella patens, B. et S. Bryol. Europ. fasc. 42. 

 Phascum patens, Hedw. Eng. Fl. 



Common on clayey soils in autumn. 



123. P. pyriforme (Linn.), Brid. 

 Gymnostomum pyriforme, Hedw. Eng. Fl. 



Frequent on moist ditch-banks. 



Genus 4. Entosthodon, Schw. 



124. E. fascicular e (Hedw.), C. Miiller. 



Physcomitrium fascicular e, Bryol. Europ. Physcomitrium, 

 p. 13. t.4. 

 Rare : it has been gathered at Hurstpierpoint, Henfield, Albourne, 

 and Kingston near Lewes. 



