The incidence of their occurrence is as follows :— Stratigraphical Arrangement, showing Occurrence of Species. Fig. Waikaia. Wharekuri. Clifden. Target Gully. Ardgowan. White Rock River. Awamoa. Pukeuri. Tuhua (N. Island). Castlecliff (N. Island). Lower Miocene or Oligocene. Miocene. Upper Miocene. Upper Pliocene. Oamaru Series. Mokau Series. Wanganui Series. 1 x x x x x x 2 x 3 x 4 x x x x 5 x 6 x 7 x 7a x 8 x x x x x x 9 x x 10 x 11 x 12 x x 13 x x 14 x 15 x 16 x x 17, 21 x x 18 x x x 19 x x 20 x 22 x 23 x Otolithus (Scopelus) sulcatus Bassoli. (Plate 61, fig. 1.) Dimensions.—5 × 4 mm. Description.—Shape ovate; outer side flat, inner side slightly convex; rostrum obtuse, slight notch below antirostrum. Dorsal, ventral, and posterior rims rounded. Sulcus wide and straight; ostium longer than cauda. Occurrence.—Tuhua, North Island, 1 example; Pukeuri, 7; Awamoa, 9; White Rock River, 1; Ardgowan, 3; Target Gully, 1. Received from Geological Survey of New Zealand and Mr. H. J. Finlay. Observations.—This species was described by Bassoli in 1906 as Otolithus (Berycidarum) sulcatus, following a similar error by Prochazka in 1893 with regard to O. (Scopelus) pulcher. Priem pointed out the misdescription in 1911 (4), the sulcus being distinctly scopeloid and in no way resembling that of the Berycidae. O. (Scopelus) pulcher has a more prominent rostrum and a more distinct notch than the species now described, which agrees with O. (Scopelus) sulcatus described by Bassoli (1) from the Pliocene of Monte Gibio, near Modena, Italy. Age.—Tertiary (Miocene): Oamaru series.