139 291 
K Kt, LN (7 samples). 
Area: Brazil, West Indies, Europe, Red Sea, Madagascar, Cape of good 
Hope, Java, Borneo, Sandwich Islands, Samoa. 
141. N. (Dipl) Papula A.S. A.S. Atl. tab. VII, fig. 45. 
KKt (2 samples). 
Area: Campeachy Bay. Samoa. 
142. N. (Dipl) ocellata Ost. n.sp. Tab. nostr. II, fig. 20. 
L. 0,037 mm., b. 0,0175 mm. Coste 7,5 in 0,01 mm. not alter- 
nating with puncta. 
Valve elliptic with flattened apices. Lateral areas rather large, 
with a row of puncta, which are only conspicuous in the middle. 
Solitary in a sample from LN. 
As I have not been able to see alveoli between the coste I dared 
not determine this species as a variant of N. (Dipl.) notabilis, which it is 
always nearest in its whole habit. 
143. N. (Dipl.) Smithi Bréb, A. S. Atl. tab. VII, fig. 17. Perag. 
Diat. de Fr. tab. XX, fig. 4. 
K Kt (2 samples). 
Area: Arctic Sea, Campeachy Bay, Colon, Europe, Seychelles, Madagascar, 
Java, Tasmania, New Zealand, Samoa. 
144, N. (Dipl) suborbicularis Greg. A.S. Atl. tab. VIII, fig. 2. 
KKt (4 samples). 
Area: probably ubiquitous. 
In a sample from KKt I found a Nav. (Diploneis) agreeing with 
A.S. Atl. tab. VII, fig. 15 (from Campeachy Bay), about which Cleve 
(Syn. I, p. 96) says that it ,seems to belong to Diploneis borealis Grun.‘. 
Lyrate. 
145. N. abrupta Greg. V.H. Syn. tab. X, fig. 4. 
K Kt, (4 samples). 
Area: ubiquitous. 
In one of the samples from KKt I found a form more particularly 
agreeing with Nav. spectabilis Greg., var. Rattrayi Pant., which is con- 
sidered by Peragallo (Diat. de Fr. p. 132, tab. 21, fig. 38) a variant of 
Nav. abrupta Greg. 
146. N. clavata Greg. A.S. N.S.D. tab. I, fig. 33. 
KKt, KCgN (8 samples), 
Avea: ubiquitous. 
— — var. indica Grev. Jan. Gaz. Exp. tab. XV, fig. 15. 
19* 
