122 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



N. cancellata Donkin in Fricke's Index. The latter slightly different 

 diatom has its type figure in Donkin, British Diatoms, page 55, plate 

 8, figure 4. Schmidt's similar figure, however, has moniliform, not 

 smooth, costae. 



Type.— Cat. No. 43663, U.S.N.M. 



NAVICULA SPLENDIDA Gregory 



(Gregory, Glenshira Diat., pi. 5, fig. 14; Schmidt, Atlas, pi. 12. figs. 13-15; pi. 

 13, figs. 31-34; pi. 69, fig. 22.) 



The fine variety figured in Schmidt's Atlas, plate 69, figure 22, is 

 peculiar to Campeche Bay and the Philippine Islands. 



NAVICULA SUBACUTA (Ehrenberg) Ralfs 



(Schmidt, Atlas, pi. 43, figs. 31-33; Ehrenberg, Mikrogeologie, pi. 35A, sec. 6, 

 fig. 12.) 



NAVICULA SUBOSCITANS, new name 



(Le Diat,, vol. 1, p. 67, pi. 10, fig. 10.) 



There named N. (oscitans var. ?) suhundulata Cleve and Grove ; 

 this being preempted in Sylloge Algarum, page 159, for Schmidt's 

 Atlas, plate 49, figure 16, I propose the above name. 



NAVICULA SUFFOCATA, new species 



Plate 27, fig. 3 



Valve somewhat panduriform, deeply indented at the middle, then 

 rapidly broadened to the maximum width, then barely if at all nar- 

 rowed for one-half the distance to the apices, and finally narrowed 

 rapidly to the rounded ends; markings of narrow costae, the inner 

 end of each slightly enlarged, the outer end terminating in a candle- 

 flame shaped enlargement, in the center of which is a single bead ; 

 the costae near the middle of the valve are sharply curved or reflexed 

 backward ; in the area of greatest width they are transverse and from 

 there progressively curved forward; the spaces between the costae 

 are heavily rugose or obscurely beaded ; a conspicuous hyaline area 

 at each apex and a small rectangular one at the center ; rhaphe robust, 

 slightly wider in the central part of each half, bordered on either 

 side by a single row of large beads. 



Length, 0.096; width, 0.035; 4.5 lines in 0.01 mm. 



Perhaps this should be considered to be a wide variety of N. adonis 

 Brun (Diat. Japon, p. 41, pi. 5, fig. 3) found fossil at Jeddo, from 

 which it differs both in outline and in the strongly dotted spaces 

 between the costae, which Brun states are hyaline in his specimens 

 and which are so figured in Schmidt's Atlas, plate 174, figures 18-21. 



Type.— Cat. No. 43664 U.S.N.M. 



NAVICULA SULCATA Grevilie 



See Cymatoneis sulcata (Grevilie) Cleve. 



