Passeres │ 4│ .29│ 7│ .5│ 2│ .16 Picariæ │ │ │ │ │ │ Striges │ │ │ │ │ │ Psittaci │ 4│ .58│ │ │ │ Accipitres │ 1│ .5│ │ │ │ Columbæ │ │ │ │ │ │ Galli │ │ │ 1│ .3│ │ Hemipodii │ │ │ │ │ │ Fulicariæ │ │ │ │ │ │ Alectorides │ │ │ │ │ │ Limicolæ │ │ │ │ │ │ Gaviæ │ │ │ │ │ │ Impennes │ │ │ │ │ │ Steganopodes│ │ │ │ │ │ Herodiones │ 1│ 1.│ │ │ 1│ 1. Odontoglossæ│ │ │ │ │ │ Palamedes │ │ │ │ │ │ Anseres │ 2│ .67│ 3│ 1.│ │ Struthiones │ 1│ _3.3_│ │ │ │ ────────────┴─────────┴─────────┴─────────┴─────────┴─────────┴───────── For meaning of italics see footnote Table 1. A review of the active verminous lesions of the bronchi and the pneumonitis to which parasites lead, shows again the highest number among the Carnivora, with negligible percentages among the Aves. The forms concerned are, when determined, ascarides, strongylus, hepaticola, fasciolopsis, cytoleichus, pneumonyssus and paragonimus; these will be discussed later. The lesions in the bronchi are mucocatarrhal or hypertrophic; occasionally actual ulcerations are seen. What is more important however is the peribronchitis leading to interstitial pneumonitis and to bronchiectasis of the smaller bronchi, or to areas of atelectasis by total occlusion of some small air passage. This pathology is fairly well recognized among veterinary pathologists but there are two points which seem worthy of special emphasis, namely, the relative mildness of the changes in the larger bronchi and the importance of the worms as causes of pneumonia. In regard to the first it can be pointed out that the trachea and its branches need not be altered at all while the middle sized bronchi present a mottling of small recent congestion with pigmentations from old hemorrhages, together with slight unevennesses of the surface. Small bronchi on the other hand are the seat of ulcerative internal processes and quite marked peribronchitis, as indicated by round and connected tissue nuclei or perhaps polynuclear increase under active acute inflammation; it is in the latter case that acute pneumonitis is present.