NOTES ON SOUTH NIGERIAN MYCETOZOA 133 



Arcyria cinerea (Bull.) Pers. Common at Ibadan and 

 Agege ; the white plasmodium emerged in small scattered masses 

 on much-decayed logs. The stalks of the grey cylindrical 

 sporangia are usually combined in clusters of three to eight ; it 

 belongs therefore to the forma dicjitata so often met with in the 

 tropics. 



A. denudata (L.) Sheldon. Common at Ibadan and Agege 

 on dead wood. 



A. NUTANS (Bull.) Grev. Ibadan. 



A. CErstedtii Kost. Ibadan, fairly common and forming 

 line growths on dead wood. One specimen developed irregularly ; 

 the rose- red cylindrical sporangia are seated as usual on a mem- 

 branous hypothallus, but are almost prostrate and where broken 

 are seen to be penetrated by a central tubular air-space ; the half- 

 ring-shaped thickenings of the capillitium are more prominent 

 than usual, and the network of threads shows many swollen free 

 ends. 



Perich^na depressa Lib. Common at Ibadan on dead 

 wood of Dicotyledons ; in one instance it was found on dead roots 

 some distance under the soil. The red-brown lid-like upper 

 walls of the flattened sporangia easily fall off exposing shining 

 membranous inner walls ; the tubular threads of the capillitium 

 measure 2 to 3 /x diam., and are regularly thickened on the inside 

 with close-set transverse rings about 2 /x apart ; on the outside 

 the threads are either smooth or marked with irregular shallow 

 constrictions : this internal thickening of the capillitium tubes is 

 characteristic of P. depressa. 



P. vermicularis (Schwein.) Post. Ibadan; on dead bark and 

 on old cotton bolls ; the slender buff-brown sporangia are either 

 short and curved or form more or less extensive net-like plasmodio- 

 carps. 



Desckiption of Plate. 

 Fig. 1. Phi/aarum digitatiim G. Lister & Farquharson, clusters of 

 sporangia; 1 a, capillitium and spores with a fragment of sporangium-wall in 

 which three crystalline discs are embedded ; 1 b, three spores. — Fig. 2. Diachaa 

 radiata G. Lister & Fetch, a group of sporangia seated on a layer of hypo- 

 thallus from South Nigeria ; 2 rt, portion of the network of capillitium 

 attached to a columella which contains no lime-granules except at the base ; 

 2 &, group of spores; 2 c, spore of South Nigerian specimen; 2 rf, spore of 

 specimen from Ceylon. 



NOTES ON THE FLOEA OF DEKBYSHIEE.— IV.- 

 By E. & H. Drabble. 



Since the appearance of our last article on the Flora of 

 Derbyshire much field-work has been done in the north and east 

 of the county. In the accompanying list twenty-three records of 

 species or varieties hitherto unrecorded for the county are given, 



* See Journ. Bot., 1909, pp. 199-207; 1911, pp. 313-317; 1913, pp. 5-11. 



