DR. S. F. HARMER ON A HAIR-BALL. 241 



A. Both sexes dark; horns regularly curved in a subcircular 



form. 



Size medium S. c. simpsoni. 



B. Adult bulls often dark, j'oung bulls and cows red or tawny ; 



horns more expanded laterallj'. 

 a. Throat of bulls orange tawny. 



a'. Size large ; throat of cows orange -B. c. planiceros. 



a". Size smaller ; throat of cows coloured like neck ; 

 horns mainly in one plane ; ear-fringe of cows 



partly orange B. c. hunti. 



h. Apparentlj' no orange on throat. 



Size medium ; horns strongly bent backwards ; ear- 

 fringe of cows mainly black U. c. hrachyceros. 



C. Adults of both sexes rufous or tawny ; horns more or less 



angulated and flattened. 



a. Size small; horns strongly angulated; heavj' ear- 



fringes ; apparently a dark dorsal stripe B. c. nanus. 



b. Size apparently larger ; horns less strongly angulated ; ' 



less abundant ear- fringes ; no dark dorsal stripe B. c.heddingtoni. 



[Since the above was written I have seen specimens which show 

 that old bulls of B. c. hunti may retain the red coat while younger 

 ones may be dusky.] 



EXHIBITIONS AND NOTICES. 

 March 4, 1913. 



Dr. A. Smith Woodward, F.E..S., Vice-President, 



in the Chair. 



Dr. P. Chalmers Mitchell, F.K.S., F.Z.S., Secretary of the 

 Society, exhibited a lantern-slide made from a photograph of a 

 domestic Donkey [Equus asinus) taken by Captain C. H. Armitage 

 in the Gold Coast, and showing a very remarkable pattern of 

 transversely arranged black stripes on the flank. 



Mr. E. G. BouLENGER, F.Z.S., Curator of Eeptiles, made 

 remarks on the Lung-Fish, Protopterua cethiopicus, which the 

 Society had recently received from Mr. C. W. Woodhouse, and 

 which was the only Dipnoan that had not previously been 

 exhibited alive in Europe. 



Dr. S. F. Harmer, M.A., F.R.S., exhibited a Hair-ball which 

 was presented to the British Museum (Natural History) by 

 Mr. A. Dobree, in January 1911. Alluding to Mr. E. G. 

 Boulenger's exhibit, on February 18th last, of spines of a Mada- 

 gascar Insectivore in the excrement of- a Boa, he pointed out that 

 this was perhaps another case of the occurrence of spiny hairs in 

 the alimentary canal of a reptile. Mr. Dobree's specimen, which 

 has been described by Mr. R. Lydekker, F.R.S., in ' The Field,' 

 vol. 117, Feb. 25, 1911, p. 383, was found in the Province of 

 Morondava, West Coast of Madagascar, between Belo on the 



