294 12. Fragil. 1. HYDROPHYTE. Pl.cell.apk 
3. Fragilaria peclinalis. Finlike breaking-up . 
Threads simple, flat, stiff, narrow, very brittle, growing 
narrower; joints three times broader than long, pellucid in 
the middle. 
Conferva peclinalis, Muller in N. Act. Petr. 3, 91 ; Engl . Bot. 161 1. 
Conferva branchings, Roth Cat. 1, 186. 
Diatoma pectinalis, yjgardh Disp. 35. 
On decaying leaves in ditches ; March. 
XIII. 13. BIDDULPHIA. Biddulph. 
Thallus threadlike, jointed, compressed; joints nume- 
rous, formed of several longitudinal filaments united to- 
gether by a transverse pellucid band ; sporidia granular, 
purplish, forming a spot under the tranverse band. — Ma- 
rine plants, green or white. 
1 . Biddulphia pnlchella. Pretty hiddulph. 
Threads simple, pale green ; joints nearly as long as 
broad, four-cornered, granular, reddish. 
Conferva Biddulphiana, Engl. Bot. 1762. 
On marine plants; November and December. 
Threads half an inch long; sporidia reddish, scattered ; 
joints appearing as if furrowed longitudinally, crenate 
where they join. 
2. Biddulphia obliquata. Crooked biddulph . 
Threads nearly simple, in tufts, brownish white; joints 
aggregated, obliquely four-cornered, connected with the 
next by one corner. 
Conferva obliquatn, Engl. Bot. 1869, left-hand fig. 
Diatoma obliquata, Lyngbye Hydr. Dan. 181. 
On marine plants. 
Joints about as broad as long ; granules red or brownish. 
0. longa. Joints nearly twice as long as broad. 
Conferva obliquata, Engl. Bot. 1869, right hand fig. 
3. Biddulphia stipitata . Stipitated biddulph. 
Threads simple, few-jointed, inserted laterally on a long, 
hairlike stipes ; joints twice as broad as long. 
Conferva stipitata, Engl. Bot. 24S3. 
Covering marine plants. 
Tufts golden yellow, when dry greyish ; threads composed 
of 3 to 5 joints, twice or thrice as long as broad, rather 
bent upwards. 
