141 293 
According to Cleve (Description of plates) this form perhaps ought 
to be referred to Nav. fallax Cl. or to Mastogloia. 1 must add that the 
present form has no resemblance to the figure of Nav. fallax Cl. (Syn. I, 
tab. V, fig. 24) and that I have seen no loculi in it. 
151. N. (Pseudoamphiprora) decora Grev. = Stauroneis decora Grev. 
Tab. nostr. II, fig. 22. Cnfr. Grev. Tran. Micr. Soc. Edin. VIII, tab. Il, fig. 11. 
L. 0,067 mm., b. 0,012 mm. Strive at least 25 in 0,01 mm., 
conspicuous only at the margin outside the longitudinal lines. 
KKt (2 samples). 
Area: New Caledonia. 
The present form is shorter and proportionally more slender than 
Greville’s. Cleve supposes that Stawron. decor. Grev. probably must 
be referred to Pseudoamphiprora, a subgenus in its systematic position 
between N. Lyrate and Caloneis (Cl. Syn. I, p. 70 & 72). 
Hennedyee. 
152. N. Hennedyi W. Sm. var. furcata Perag. Perag. Diat. de Fr. 
tab. XXIV, fig. 17. 
— — var. nebulosa Greg. Perag. l.c. tab. XXV, fig. 11. 
K Kt (3 samples). 
Area: the main species ubiquitous. 
var. furcata: Banyuls, Naple (Perag). 
var. nebulosa: Cape Horn, Florida, Europe, Morocco, Madagascar, 
Ceylon, Galapagos. 
Persiriate. 
153. N. brasiliensis Grun. A.S. Atl. tab. VI, figs. 23—25. 
KKt, LN, TK (6 samples). 
Area. Eastern Coast of America, Bab el Mandeb, Zanzibar, Madagascar, 
the Seas S. and E. of Asia, New Caledonia, Samoa, Sandwich Islands. 
154. N. sublyrata Grun. Cl. Vega Exp. tab. XXXV, fig. 17. 
Solitary in a sample from K Kt. 
Area: North America, Labuan. 
Johnsoniec. 
155. N. Scopulorum Bréb. Perag. Diat. de Fr. tab. VIII, fig. 29. 
KKm, TK ( samples). 
Area: Arctic Oceans, Brazil, Europe, Sumatra, Borneo, Japan. 
NB. Somewhat unsymmetrical as figured in the figure by Peragallo 
quoted above. In a few specimens | have seen a narrow stauros caused 
by the wanting of strize in the middle. 
