Nestor meridionalis, Gml. Scarce. Chrysoccyx lucidus, Gml. Scarce. Carpophaga novce zealandice, Gml, Scarce. Larus dominicanus, Licht. Scarce Procellaria lessoni, Garnot. Scarce. " gouldin, Hutton. " cookis, Gray. Puffinus gavius, Hutton. Dysporus serrator L. Graculus varius, Gml Eudyptula-minor, Forst It is evident from an examination of this list that the avifauna is much richer on these comparatively small islands than on the adjoining mainland, where, to give only one instance, Anthornis melanura has entirely disappeared, while on these islands it is still of frequent occurrence. Of the birds at least three, namely, Procellaria gouldin and puffinus gavius,live sociably in the holes generally dug out by the tuatara (Sphenodon punctatum, Schtz.), and apparently on the best of terms with it. The tuatara excavates its hole mostly on the western slope of the islands. The entrance to the chamber is generally four to five inches in diameter, and the passage leading into the inner chamber is two to three feet long, first descending and then ascending again. The chamber itself is one foot and a-half long by one foot wide and six inches high, and is lined with grass and leaves. The following rough sketches give (1) a section of the passage and inner chamber, and (2) a section along the greatest diameter of that strange habitation. On both sides of the entrance the two animals have their nests separately, so that they do in no way interfere with each other. On the right side lives generally the tuatara, and on the left the petrel. In one chamber I found one tuatara and one petrel with its eggs, in another one tuatara and one young petrel.