J. W. W. STEPHENS, M.D., B.C., D.P.H.
TREMATODA.
Artyfechinostomum sufrartyfex, Clayton Lane, 1915.—Leiper thinks this may be the same as Echinostoma malayanum, Leiper, 1911, which species Odhner assigns to the genus Euparyphium.
Metagonimus (Yokogawa) yokogawai occurs in dogs in Shanghai. Encysted cercariæ probably in the perch.
Opisthorchis sp.—Skin covered with spines. Gut forks almost reach end of body. Œsophagus two to three times length of pharynx. Ovary multilobed. Ovary and testes in posterior fourth of body. Vitellaria end opposite the ovary. Distinguished from O. felineus by presence of spines and lobed ovary; from O. pseudofelineus and O. noverca by the lobed ovary, and by the fact that the yolk glands do not extend as far as the anterior testis. It agrees with Poirier’s description of O. viverrini in the Indian civet cat, but whether this species has spines on the cuticle is not known.
Habitat.—Man in Chiengmai (Malay States). Fifteen per cent. of prisoners in the jail showed the ova of this species in their fæces.
Schistosome cercariæ.
Schistosome cercariæ belong to the furcocercous division of the Distomata cercariæ.
Distomata cercariæ.
Body without a floating membrane. Tail absent, or if present not cleft to the base. Mouth anterior, gut forked. Oral sucker present. Ventral sucker near middle of body. Eyes generally absent.