33 ° Campbell .— Studies on some East Indian Hepaticae. 
Text-fig. 8. a. Young sporophyte of D. velutina. x 255. b. Apex of an older sporophyte, 
showing spore mother-cells and young elaters. x 255. 
Dumortiera calcicola , sp. nov. 
While collecting in Borneo, the writer found what is apparently an 
undescribed species of Dumortiera —certainly very distinct from the two 
species already considered in this paper. The name D. calcicola is proposed 
for this plant, as it was found in all cases growing upon limestone debris or 
over outcrops of limestone. 
The first specimens collected, which were all sterile, occurred in patches 
of considerable size upon loose heaps of debris at the foot of the limestone 
