Mr. W. Mitten on the Mosses and Hepatica of Sussex. 321 



Wells ; more abundant above Hey shot, and in several other places on 

 the ridge of the Downs ; on a tiled roof near Henfield, Mr. Borrer. 



94. G. heterosticha (Hedw.), C. Miiller. 

 Trichostomum heterostichum, Hedw. Eng. Fl. 



On all the sand rocks, but fertile only at Tunb ridge Wells. 



95. G. fascicularis (Schrad.), C. Miiller. 

 Trichostomum fasciculare, Hedw. Eng. Fl. 



In very small quantity on a rock at Henley Hill. 



Genus 8. Zygodon, Hook, and TayL 



96. Z. viridissimus, Brid. 



Gymnostomum viridissimum, Hook, and Tayl. Eng. Fl. 

 Very common on trees, more rare on walls : not rare in fruit, par- 

 ticularly on trunks of trees near the ground. 



97. Z. conoideus (Dicks.), Hook, and Tayl. Eng. Fl. in part. 

 Z. Brebissoni, B. et S. Bryol. Europ. Zygodon, p. 8. t. 2. 

 Bryum conoideum, Dicks. 



Rare : on a beech-tree on Newtimber Hill, and more plentifully on 

 Sallows by the Mill Pond at Arundel. Mr. Borrer has gathered it 

 in Charlton Forest, and Mr. Jenner in the Forest near Handcross. 



Great as the confusion has been in the names of this and the next 

 species, still it appears that the name conoideus is the proper one for 

 this moss, it being the Bryum. conoideum of Dickson ; but if the name 

 given to it by its discoverer is to be suppressed, it ought to take that 

 of Z. Bicksoni rather than any other. 



The peristome of this species is double, as described by Hooker and 

 Taylor ; not simple, as it is described and figured in 'Bryol. Europ.' 



98. Z. Forsteri (Dicks.), Mitten; "monoicus; pulvinatus hu~ 

 milis breviter ramosus, inferne tomentosus viridissimus; folia 

 caulina dense conferta, madefacta patula, e basi angustiore am- 

 pliuscule hexagone reticulata sensiin late ovato-lanceolata s. sub- 

 spathulato-acuminata, planiuscula nervo ante apicem evanido 

 crassiusculo, integerrima, e cellulis ubique magnis perfecte hex- 

 agonis chlorophyllosis firmis areolata ; perichsetialia basi multo 

 laxius reticulata ; theca in ped. brevi flavido crassiusculo erecta, 

 pyriformi-ovalis, fuscescens 8-striata, ore coarctata, operculo co- 

 nico subulato obliquo ; perist. dentes externi 8 bigeminati lati- 

 usculi subrugulosi pallide lutescentes sicci reflexi apice liberi, 

 interni : cilia 8 cum dent, alternantia breviora anguste subulata 

 hyalina subrecta." — C. Miiller, Synops. p. 667. 



Z. conoideus, Brid. i. p. 590 ; Bryol. Europ. p. 8. t. 2 ; C. 



Miiller, Synops. p. 667. 

 Gymnostomum viridissimum, in part Eng. Fl. 

 Bryum Forsteri, Dicks. ! 

 Near Hastings, Mr. Jenner. 

 Ann. $ Mag. N. Hist. Ser. 2. Vol. viii. 21 



