THE JOURNAL OF BOTANY 



Hah. 



cushion-like disposition of the chloroplast. It is a large species 

 and its movements are rapid. Daughter-cells were being formed 

 in quantity, and the first division was invariably transverse. The 

 first division-plane may be obliquely twisted so that the opposite 

 ends of the daughter- cells sometimes overlap. 



3. Chlamydomonas Holdeeeri Schmidle, " Einige von Dr.. 

 Holderer in Centralasien gesammelte Algen," Hechuigia, xxxix^ 

 1900, p. 142. 



Long. cell. 12-5-14: /x ; lat. cell. 8-9 /x; long, cihorum 21-24 /x, 

 (Fig. 3.) 



In a rain-water tub at Hereford (W. B. Grove). 



This is another species so far not 

 recorded since its original descrip- 

 tion. It occurred in immense quan- 

 tity, and the characters of the Here- 

 fordshire specimens fit very w^ell 

 those described by Schmidle for Chi. 

 Holdereri. The chloroplast is mas- 

 sive and hollowed, with a conspicuous 

 pyrenoid in its posterior part. There 

 is no stigma. The Alga was multi- 

 FiG. ^.—Chlamydomonas Hoi- plyino- rapidly, and the first division 

 dereri. A-C, ve<j;etative cells; T) ~^f j.i~^^ 'L.^/u^,, ^^n ,xT„r. \^ .-,11 

 ^r.A -p ^;-.- Vr, rsf v,,^fv.^v r.J^ fr^ ^^ tiio mothcr - ccil was m all 

 and. XL., diTision oi motnei-celi to , ., t ^ i,i i ^• ^ ,^ 



form two daughter-cells. All x 500. cases longitudmal, although shghtly 



oblique. 



4. Chlamydomonas Grovei, sp. nov. Cellulae vegetativae 

 (= zoogonidia) minutissimae, globosae vel subglobosse ; membrana 

 sine verruca anteriori ; chromatophora singula crateriformi, sine 

 pyrenoide ; stigma carente ; nucleo singulo anteriori. Propagatio 

 ignota. 



Long. cell. 2'5-4-5yu ; lat. cell. 2-5-4 ^ ; long, ciliorum 6-5-10 /^. 

 (Fig. 4.) 



Hah. In water-butt, Studley Castle, Warwickshire (W. B. 

 1912) ; Cambridge (C. E. Moss; 1914). 



It may seem undesirable to describe a 

 new species of Chlamydomonas without 

 knowing something definite concerning its 

 reproduction, but the organism I have 

 named Chlamydomonas Grovei does not 

 agree with any other described species 

 and most obviously belongs to the genus 

 Chlamydomonas. Moreover, since it has 

 been brought to me on three separate 

 occasions it is a convenience to give it 

 a definite name. The cells are almost 



Fig. 4^.— Chlamydomonas spherical, with a parietal chloroplast 

 Vegetative cells x hollowed out at the anterior end. There 

 is no pyrenoid, and the nucleus is situated 

 in the hollow of the chloroplast. 



Tho Warwickshire specimens occurred in great quantity in a 



Grove; 1911 



Grovei 

 1000 



