THE TREE- OR GREEN MAMBA 
61 
that it is not contemporaneous with the obsidian implements 
found at Njoro some twenty-five miles away, but the material, 
which is a close-textured basalt, lent itself more easily to the 
rubbing down process than implements made of obsidian. The 
two bosses at the back of the axe were evidentty left to enable 
the axe to be securely bound to a handle by means of strips 
of hide or fibre. It will be noticed that one face of the axe 
has been chipped by usage. 
It is to be hoped that this implement is the forerunner of 
an extensive series of worked implements from the surrounding 
area. 
The Eldama Ravine Station is situated at an altitude of 
about 7000 feet, and is on the edge of the primeval forest 
of the Mau Escarpment which is still inhabited by a section 
of the Dorobo or Oggick aboriginal hunter people ; members of 
this tribe were asked about this implement and stated that 
they had no idea of its use or origin. 
THE TREE- OR GREEN MAMBA 
By C. W. Hobley 
Mr. R. J. Stordy, when passing through Boran country 
on his way from Nairobi to Abyssinia, killed a very large 
specimen of this snake. It measured 9 feet 2| inches. He does 
not give a detailed description, but states that it was Dendraspis 
viridis, which is rather interesting, as D. viridis has only been 
recorded from the West Coast, the snakes of this genus from 
the East side of Africa being D. Jamesoni, D. angusticeps, 
and D. Antinorii. The last mentioned is the largest and 
is quoted as reaching 8 feet 1 inch in length in Boulenger’s 
4 Catalogue of Snakes,’ and the only locality given is Anseba, 
Abyssinia, and one therefore considers whether Mr. Stordy’s 
specimen was not D. Antinorii and not D. viridis. Our col- 
lection still lacks any specimens of the genus Dendraspis and 
members are asked to endeavour to fill the gap. I have only 
heard of two specimens being procured in East Africa : 
