87 



Macroscopic and microscopic examinations of a granuloma 

 found affecting horses in the Solomon Islands are also recorded 

 below. 



B. — Granulomata as found in Southern Australia. 



Distribution. — Up to the present these granulomata 

 have only been met with by the present writer in the northern 

 parts of Victoria and in South Australia (the only parts of 

 Australia in which the writer has worked). 



On the whole they appear to be more common in South 

 Australia than Victoria. There is no reason to believe that 

 they do not occur elsewhere in Australia, but it is probable 

 that they are to be found more commonly in the warmer parts. 



Occurrence. — These tumours have only been met with 

 during the summer and autumn months of the year. They 

 occurred in stable-fed animals, and a large proportion of the 

 cases have been stallions which have been kept in the stable 

 for longer periods than ordinary working horses. 



Site. — The tumours are found most frequently upon the 

 glans penis at the urethral orifice, but also quite commonly 

 on the sheath. When they occur elsewhere they are found 

 most commonly on the limbs. Only two cases where the 

 lesions have occurred in parts other than the penis and sheath 

 have come directly under the writer's notice. In these cases 

 the tumours were situated in the metacarpal region and in 

 the region of the hock, respectively, and were accompanied 

 by lesions in the usual site. 



In February, 1917, through the courtesy of Mr. H. R. 

 Seddon, Melbourne University Veterinary School, the writer 

 had an opportunity of examining a specimen of similar char- 

 acter taken from the membrana nictitans and lower eyelid 

 of a horse. Mr. Seddon was informed by the sender that 

 lesions were fairly frequently observed in this situation. 



Lewis and Seddon (1918) have recorded the occurrence .of 

 similar lesions in the conjunctiva of the horse. 



There seems to be no doubt that, as the knowledge of 

 the characteristics of these granulomata becomes more wide- 

 spread, they will be found to occur quite frequently in 

 situations other than the external genitalia. 



Duration. — The tumours appear fairly suddenly, and 

 grow rapidly for the first two or three weeks. From this 

 time onward they gradually enlarge, and they usually show 

 no tendency to disappear, although there is some evidence to 

 show that occasionally the lesion may be quite transient. 

 Most of the tumours - met with have been removed surgically, 

 so that there has been little opportunity of observing the 



