M. V. Lebour 
11 
Fig. 3. The same under low power. 
Fig. 4. The same encysted. Size 0'36 mm. x 0’24 mm. 
Fig. 5. Cercaria emasculans Pelseneer. Size 0‘38 mm. without tail. 
Fig. 6. The same showing sporocysts. 
Fig. 7. Cercaria chromatophila sp. inq. Size 0-70 mm. 
Fig. 8. The same under low pressure. 
Fig. 9. The same in cyst with surrounding pigment. Size of cyst 0-36 mm. x 0’26 mm. 
REFERENCES. 
Braun, M. (1902). Fasciolideii der Vogel. Zool. Jahrh. xvi, No. 1. 
Gamble, F. W. and Drew, G. H. (1912). Note on the Abnormal Pigmentation in 
a Whiting infected by Trematode Larvae. J. Marine Biol. Ass. Plymouth., ix, 
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Jagerskiold, L. a. (1908). Kleine Beitrage zur Kenntni.s der Vogeltrematoden. 
Centralhl. f. Baht, i Abt. Originale, XLViii, No. 3. 
Lebour, M. V. (1907). On Three Mollusk-infesting Trematode.s. Ann. and Mag. 
Nat. Hist. XIX. 
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Lesp^s, C. (1857). Observations sur quelques cercaire.s parasites de Mollu.sques 
marin.s. Ann. des Sci. Nat. Ser. 4, Zool. vii. 
Linton, E. (1911). Trematode Parasites in the Skin and h'lesh of Fish and the 
Agency of Birds in their occurrence. Trans. Anier. Fish. .Sor. 
Nicoll, W. (1907 a). Parorchis acanthus, the Type of a New Genus of Trematodes. 
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Trematodes. Q. J. Micr. Sci. liii, part III. 
Odhner, T. (1902). Mittheilungen zur Kenntnis der Distomen 11. Centralhl. f. 
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Pelseneer, P. (1906). Trematodes parasites de ^lollusques marins. Bull. Sci. de 
la France et de la, Belgique. 
Williamson, H. Chas. (1911 a). Notes on the Eggs of the Angler etc. 28f/i Ann. 
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