292 140 
Found only in a sample without habitat. 
Area: Honduras, Manilla, Cebu, Macassar, Ceylon, Sumbava (Cleve). 
147. N. forcipata Grev. var. nummularia Grev. A.S. Atl. tab. LXX, 
fig. 38. Perag. Diat. de Fr. tab. XXI, fig. 31. 
LN (2 samples). 
Area: Californian Guano, Florida, Adriatic, Bab el Mandeh, Madagascar, 
Cape of good Hope, Java. 
— — var. suborbicularis Grun. Perag. Diat. de Fr. tab. XXI, fig. 32. 
K Kt (2 samples), 
Area: Spitzbergen, North Sea, Baleares, Seychelles, Java, Zulu Sea, Gala- 
pagos. 
148. N. Lyra Ehb. 
Among the numerous variants of this form I have found: 
N. Lyra Ehb. forma typica. Perag. Diat. de Fr. tab. XXII, fig. 3. 
A.S. Atl. tab. II, fig. 25. 
— — var. dilatata A.S. A.S. Atl loc. fig. 26. 
— — var. ellipticea A.S. V.H. Syn. tab. X, fig. 2. A.S. tab. III, 
fig. 12. 
— — var. intermedia Perag. Perag. Diat. de Fr., tab. XXIII, fig, 11. 
— — var. producta Pant. Perag. |. c. tab. XXII, fig. 13. 
— — var. subearinata Grun. A.S. 1c. tab. Il, fig. 5. 
— — var. spec? A.S. Atl. tab. III, fig. 12 (from Java). 
KKm, KKt, KCgN, LN (18 samples). 
Area: Nav. Lyra: with varieties widely distributed, the var. subcarinata: 
Indian Sea, Samoa, Tahiti. 
149. N. spectabilis Greg. var. emarginata Cl. Jan. Gaz. Exp. tab. XV, 
fig. 22. 
KKt (1 sample). 
Area: Campeachy Bay, Sierra Leone, Japan. 
150. N. mediopartita Grove var. Tab. nostr. II, fig. 21. Cnfr. A. S. 
Atl. tab. CCIV, fig. 16. 
L. 0,045 mm., b. 0.019mm. Strizee 22 in 0,01 mm. 
Valve lanceolate with somewhat protracted apices. Two lines 
forming a lyrate figure and nearly parallel to the margin are present. 
Marginal part conspicuously striated; on the inner part between 
the lines and raphe the strie are closer and more difficult to see. 
Narrow transapical area. 
K Kt (2 samples). 
Area: N. mediop.: Oamaru (Grunow). 
