VEGA-EXPEDITIONENS VETENSKAPLIGA ARBETEN. 513 
N. insignis Greg. var. gemwina Grun. (Aret. Diat. pag. 84). 
Length 0,17 mm. Breadth 0,011 mm. Strie 10, carinal puncta 
6 in 0,01 mm. 
N. campechiana Grun. (M. J. III, 1880, PI. XIII, fig. 16). 
Length 0,065 mm. Breadth 0,023 at the constriction 0,019 mm. 
Carinal puncta 3, strie 24 in 0,01 mm. | 
N. marginulata Grum. (Aret. Diat. pag: 72, Pl. IV, fig. 93). 
Length 0,093 mm. Breadth 0,013 mm. Carinal puncta 12—14, 
strie 25 in 0,01 mm. 
N. Jelineckit Grun. (Aret. Diat. pag. 74). 
N. panduriformis Greg. var. 
N. diluvialis Cl. conf. pag. 150. 
Pseudoeunotia Doliolus (Wallich) Grun. (Van Heurck Syn. 
Ph KANXVIT22): 
OClimacosphenia elongata Bail. 
Swrirella fluminensis Grun. (A. Schm. Atl. Pl. V, fig. 6). 
S. Lorenziana Grun. (A. Schm. Atl. Pl. V, fig. 5). 
S. patens A. Schm. (Atl: Pl. VI, fig. 16—17). 
S. mexicana A. Schm. (Atl. Pl. VI, fig. 10—12). 
S. lepida A. Schm. (Atl. Pl. IV, fig. 3—5). 
Sk euneata, A. Schm:. (Ati; Pi IV feg 1). 
S. orbicularis Cl. N. Sp. — Valve orbicular, 0,075 mm. in 
diameter. Canaliculi distant 1—1 !/> in 0,01 mm., a little more 
than half of the radius in length, encircling a depressed cen- 
tral area, which is almost smooth. Margin striate with 18 
strie in 0,01 mm. — This beautiful species should perhaps be 
more correctly arranged in the genus Campylodiscus; where it 
seems to come near to C. Helianthus, but I think neverthe- 
less it is most nearly related to Surirella fastuosa. — P1. 38, 
fo TT 
Campylodiscus undulatus Grev. (A. Schm. Atl. P1. XVIII. 
HoTLIN: 
C. decorus Bréb. (A. Schm. Atl. P1. XIV, fig. 4—5). 
GC: Ralfsu W. Sm. (AC Sehim. Atl: Pl. XIV, figi 1). 
C. erebrecostatus Grev. (A. Schm. Atl. Pl. XV, fig. 16—17). 
C. subangularis Grun. (A. Schm. Atl. P1. XVIII, fig. 5—6). 
C. densecostatus Cl. — Diam. 0,0o84 mm. Canaliculi numerous, 
6 in 0,01 mm., reaching to the median raphe and interrupted 
by a circular furrow, !/4 of the radius distant from the mar- 
gin. — Pl. 38, fig. 76. 
C. limbatus var. minuta Cl. — Diam. 0,027—0,035 mm. Cana- 
liculi about 9 in 0,01 mm. — Pl. 38, fig. 77. 
Ba III. f 33 
