The lophophore of the rhynehonellid brachiopodNotosaria nigricansfrom New Zealand develops through trocholophous and schizolophous stages before reaching the final spirolophous condition. This development, and the structure and elliation of the spirolophe, are described in detail. The development of the digestive system is noted briefly: as in other Articulata there is no anus even at the earliest stages of growth.