136 MRS. E. M. REID ON" TWO [vol. lxxvi, 



the apex form reticulations, and at the apex give a slightly toothed 

 appearance ; walls fairly thick. 



Length=P5 mm. ; breadth="75 mm. 



A species closely resembling this was described and figured in 

 ' The Pliocene Floras of the Dutch-Prussian Border ' (1915, p. 133 

 & pi. xvi, fig. 24) as a Labiate belonging to an unknown genus. 

 I have now found the genus ; it is a 3felissa. There are onhy three 

 living species of Melissa : — the European species 31. officinalis, 

 and two others : 31. fiava and 31. parvifiora, both plants of the 

 Himalaya, but the latter also a native of China. Of the three, the 

 Castle-Eden species most resembles the Chinese and Himalayan 

 31. parvi 'flora in its coarse rugosities, those of 31. officinalis being 

 both finer and less prominent. 31. parvifiora, however, is larger, 

 more oblong, not so markedly obovate, and the rugosities are not 

 beaded, nor do they give rise to the same marked striations below 

 and toothing above, but rather to reticulations over the whole 

 surface, which become elongate below. Though differing in these 

 respects, the general form and character of the fossil, and the 

 character of the attachment, show that it belongs to the genus. 



The Peuverian species is extremely close to that of Castle Eden, 

 some specimens being in almost exact agreement ; but the striations 

 and toothing are rather coarser and more marked than the average 

 of the Castle-Eden specimens. Whether it should be considered as 

 a variety, I am doubtful. 



A single specimen of 31. officinalis was recorded from Tegelen. 

 Thinking that a mistake might have been made, and that this 

 form might be the same as the Castle-Eden species, I re-examined 

 it, but see no reason to doubt that its ascription to 31. officinalis 

 was correct. It does not show the strongly-beaded rugosities of 

 the Castle-Eden and Reuverian species. 



3£. parvifiora occurs as a mountain plant in Yunnan and Mount 

 Omi in China, where it is found in the forests up to a height 

 of 5500 feet, and in the Himalaya as high as 10,000 feet in Sikkim. 

 It also occurs in Malaya. 



Thymus serpyllttm Linnaeus. (PI. X, fig. 10.) 



Nut minute, globular. Length= - 6 mm. ; breadth = *6 mm. 



This nutlet undoubtedly belongs to a species of Thymus, of which 

 there are a great number of species, with nutlets closely resembling 

 one another, frequently differing only in size. One of the smallest 

 is T. serpyllum, with the nutlets of which the fossils agree, 

 although they are smaller than the average size, being only 

 comparable with small specimens. The difference of size is partly 

 due to the fossils having lost their outer coat. 



Clinopodium Nepeta O. Kuntze. (PL X, fig. 11.) 



Nut orbicular, ventral face roundly angled, base bluntly trian- 

 gular, with deep depressions on each side of the attachment. 

 Length="9 mm. ; breadth= - 8 mm. 

 The character of the base and the attachment of the nut show 



