314 REPOET OF BOTANICAL DEPARTMENT, BRITISH MUSEUM, FOR 1881. 



Lycopodinm Selago. 



Equisetum arvense. 



E. palustre. 



Cliara fragilis. 



Spliagnum cuspidatum. 



Dicliodoutium pellncidum. Moist 

 ground near Loch Fada, 

 Colonsay. 



Dicranella heteromalla. 



Dicranum fuscescens. 



Camxjyiopus fragilis, and var. 

 densus. 



Pottia Heimii. Crevices of rocks 

 near Loch Fada, Colonsay. 



Ditrichum flexicanle, var. deu- 

 sum. 



Barbula ruralis, var. rupestris. 



B. intermedia. 



Ceratodon pnrpureus. 



Kacomitrium aciculare. 



K. canescens. 



Zygodon viridissimus. Walls of 

 Crystal Spring Cavern, Co- 

 lonsay ; and var. rupestris, 

 wet rocks near Loch Fada. 



Ulota phyllantha. 



Physcomitrium pyriforme. 



Fumaria hygrometrica. 



Bryum pendulum. Crevices of 

 rocks near Loch Fada ; the 

 islanders sometimes use it 

 for dyeing jDurposes, and say 

 it gives a most beautiful 

 dark brown colour. 



B. alpinum. 



Pogonatum nanum. 



P. aloides. 



Fontinalis antipyretica. 



Hedwigia ciliata. 



Camptothecium lutescens. 



Brachythecium velutinum. 



Eurynchium myosuroides. 



E. striatum. 



Hypnum aduncum, Hediv., non 

 Bry. Brit., and var. Kneithi. 



H. molluscum. 



H. palustre. 



H. polygamum. 



H. stellatum. 



OFFICIAL REPORT FOR 1881 OF THE DEPARTMENT OF BOTANY 

 IN THE BRITISH MUSEUM. 



By W. Carruthers, F.R.S. 



The principal work of the Department has consisted in 

 preparing the public gallery. The exhibited collections in the 

 public rooms belonging to the Department at Bloomsbury were 

 removed to the new building in the early part of the year. Many 

 unforeseen difficulties have hindered the progress of the work 

 of arranging, while the protection of the collections from dangers 

 incidental to the occupation of a new building has demanded the 

 attention and occupied the time of the officers. Considerable 

 progress has been made in the public gallery in arranging a series 

 of specimens illustrative of the Natural Orders of plants. The 

 exhibition rooms connected with this Department had hitherto 

 been occupied with specimens suitable from their size, or from other 

 peculiarities, for exhibition ; and many divisions of the vegetable 

 kingdom were altogether unrepresented. An attempt has now 

 been made to present to the public a series of specimens 

 representing all the Natural Orders, and, to make the exhibition 

 both attractive and instructive, coloured drawings of the plants 

 have been freely used with the specimens. Some of the fossil 

 representatives of Natural Orders are intercalated with the recent 

 specimens, and the distribution of each Order in time and space 

 is shown on a small map. Small diagrams, exhibiting the 

 characters on which the Orders are separated from each other, are 



