307 
1888 - 89 .] Dr R. W. Felkin on Tropical Diseases. 
with on the coast of the Madras Presidency, being chiefly seen near 
Madras and Pondicherry. It is known too in the plain of the Car- 
natic, from Mysore between the eastern and western Ghauts towards 
Cape Comorin. On the western sea-board the worm is found in the 
Bombay Presidency from lat. 18° N. up to Goojerat, at Rutnagherry, 
Matunga, Bombay, and Daman ; also at Baroda, Caira, and 
Jambosir, and at Bhooj in Cutch. Great centres of the disease are 
met with in the Mewar and Marwar (Rajpootana States), in the 
district of Chanda, at Dhoolia in Khandeish, at Hagpore, in Behar, 
at Aurangabad, Jalnah, Hyderabad, and Secunderabad, on the east 
side of the western Ghauts and in the adjoining districts of the 
Deccan, where it is especially prevalent at Ahmednuggar, Jedjhuri, 
Baramati, Poona, Satara, Aculcota, Tasgoon, Miraj, and Beejapore, 
the district of Savant-Warri, Balgam, Darwar, and Bellary. 
In the Hew World the disease was imported from the west coast 
of Africa into Guiana, Brazil, and the West Indies, but it has almost 
disappeared except at the island of Cura 9 oa, and in the small town 
of Peira da Santa Anna in the province of Bahia. 
Remarks . — It is useful to remember certain facts with regard to 
Guinea-worm. In the first place, all races of both sexes and at all 
ages may suffer from it, but it certainly attacks by preference 
natives who go about barefooted, and it is most usual in middle life. 
In all probability it gains entrance into the body by direct con- 
tact of an exposed part of the body with water or mud, the parasite 
penetrating the pores of the skin. There have been many attempts 
made to connect the occurrence of the Guinea- worm with the 
geological features of the soil where it is found, but, although on 
the whole it is most prevalent in localities composed of secondary 
trap rock, it is also met with where the geological structure is 
sand on sandstone. There is a certain relation between heat and 
moisture and the production of the parasite. It is found in places 
where- there is a mean temperature in summer of about 88° P. On 
the whole, the Guinea-worm is most frequently met with at the 
beginning of the rains, and in the hot weather succeeding them, 
although it appears to be the case that in India it is most 
usually found during the rains. It is impossible to say how long 
is the period of the incubation of the Guinea-worm, but it probably 
varies from one month to a year, and with regard to the part of the 
