MYCETOZOA OF ANTIGUA. 379 



in all the specimens of P. 7iucleatum we have examined the small 

 angular lime-knots contain strikingly large and round lime-granules, 

 which are more loosely arranged than in P. compacUim ; these 

 granules often fuse together, so as to form a vitreous nodule. 

 The dense deposit of lime in the stalk and the usually well-defined 

 spots of lime in the sporangium-wall afford the most distinct 

 specific features of P. compactum, as contrasted with the absence 

 of lime in the stalk and the crowded calcareous deposits in the 

 sporangium-wall of P. nucleatnm. 



Physarum in^quale Peck. The specimen from Antigua, on 

 dead wood, is the small compressed form obtained by Count Solms 

 Laubach in Java in 1884, preserved in the Strassburg collection, 

 and by Prof. 0. Penzig in the same island in 1896.* It is closely 

 allied to P. virescens. 



Chondrioderma reticulatum Rost. On dead leaves. Effused or 

 elongate plasmodiocarps, with typical capillitium and spores. 



Chondrioderma rugosum Rex. This Antigua gathering is repre- 

 sented by a number of sporangia mounted in glycerine-jelly. The 

 capillitium is darker than described by Dr. Rex, but examination 

 of the original type shows considerable colour in some sporangia. 

 The stalks are longer than in the Dominica specimen (Journ. Bot. 

 1898, 118), and the spores measure 8-9 fx. 



DiACH^A suBSESsiLis Pcck. Mr. Cran obtained a fair supply of 

 this species in Antigua, but it was unfortunately lost at the time 

 of his leaving the island, with the exception of a mounting in 

 glycerine-jelly of several sporangia. These are quite typical, the 

 spores having precisely the same sculpture as those from FJitwick 

 (figured in Journ. Bot. May, 1898, tab. 386, fig. 9). Further British 

 gatherings have been secured since the first discovery in this 

 country in Sept. 1896 (/. c. 1897, 213). It was found in con- 

 siderable abundance by Mr. Crouch in Flitwick Wood, in October, 

 1897, and by Mr. Saunders in the same month at Holt, Norfolk, 

 in Mr. Gurney's woods. 



DiDYMiuM FARiNACEUM Schrad. var. minus. There are two speci- 

 mens from Antigua of this species. One is of the usual form, with 

 dark rugose stalks. In the other the stalks are white, and densely 

 charged with crystals of lime below the almost black columella. 

 A gathering from Lyme Regis with half the stalk white and 

 similarly charged with lime connects this specmien with the type, 

 but it is a striking and instructive form. The spores measure 8 /x. 



DiDYMiuM NiGRiPES Fr. var. a. On dead leaf. This is a typical 

 specimen with tlie dark columella. That recorded from Antigua in 

 the former notice was var. y xanthopus with a white columella. 



CoMATRicHA OBTUSATA Preuss. On dead wood. A small form 

 with globose sporangium, and slender capillitium forming a loose 

 superficial net. Spores nearly smooth, 7 /x diam. 



* Die Myxomyceten der Flora von Buitenzorg, Dr. Penzig, Leiden, 1898, p. 34. 



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