Page:Transactions of the Royal Society of Tropical Medicine and Hygiene, volume 1.djvu/110

82 As already stated, the characters given for P. caucasica are few in number. The description of the mouth parts contains only facts of generic importance. Its small size, the different relation of its papillae to one another, and the difference in size of its spicules and ova will suffice to distinguish it from P. viordens.

The type-specimens are deposited in the Helminthological Museum Collection (Human Series, No. 30) of the London School of Tropical Medicine.