TABLE OF CONTENTS. 



Paga 



Letter of transmittal 7 



General remarks ' 9 



Parasites of the nose : 



Grub in the head, (Estrua ovis, Linn 2b 



Parasites of the skin : Phthiriasia, Acariasis. 



The sheep tick, Melophagiis ovinus, Linn 39 



The sheep louse, Trichodectes sphwrocephalus, Nitzsch 45 



The goat louse, Trichodectes limbatus, Gervais, and Trichodectes climax, 



Nitzsch 49 



Scab insects : Acariasis, itch, scab. 



Head scab, Sarcoptes scabiei, de Geer, var. ovis 53 



Conunou scab, Psoroptes communis, Fiirst, var. ovis 56 



Foot scab, Chorioptes communis, Verheyen, var. ovis 65 



Parasites of diverse organs : 



The pentastoma, Linguatulatccnioides, Rud 69 



Immature tape-worms : 



Bladder worms, Tcenia marginata, Batsch 72 



Gid or staggers, Tunia cvctiurus, Kiich 83 



Hydatids, Tcenia echinococcus, V. Sieb 86 



The mutton measle, Twnia tenella, Cobbold 87 



Parasites of the alimentary canal and appendages: 



Adult tape- worms: 



The fringed tape- worm, Tenia fimiriata, Diesing 89 



The broad tape-worm, Tcenia expansa, Rud 113 



Liver-flukes : 



The large liver-fluke, Distoma hepaticiim, Linn 127 



The small liver-fluke, Distoma lanceolatiim, Mehlis 137 



The stomach worms : 



Amphistoma conicnm, Zeder 138 



Stromjylus contortus, Rud 141 



Intestinal round worms : 



Introductory remarks 145 



Slrongylus filicollis, Rud 146 



Strongylus ventricosus, Rud 149 



. Ascaris lumbricoidis, Linn.... 131 



Dochmius cernuus, Creplin 155 



Sclerostoma hypostovium, Diesing 161 



The nodular disease of the intestine, (Esophagostoma Columhianum, n. sp 165 



Trichocephalus affiiiis, Rud 181 



Parasites of the lungs : 



Introductory remarks 185 



The hair lung- worm, Slrongylus ovis-pulmonalis, Diesing 186 



The thread lung- worm, Strongylus Jilaria, Had 201 



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