VEGA- EXPEDITION ENS VET EN S K A PL I G A A P BE TEN. ^ 1 '^ 



N. insignis Greg. var. genuina Grun. (Arct. Diat. pag. 84). 

 Length 0,i7 mm. Breadth 0,oii mm. Stria? 10, carinal puncta 

 <) in 0,01 mm. 



N. campechiana Grun. (M. J. Ill, 1880, PI. XIII, fig. 16). 

 Length 0,o65 mm. Breadth 0,023 at the constriction 0,oi9 mm. 

 Carinal puncta 3, stride 24 in 0,oi mm. 



N. margimdata Grun. (Arct. Diat. pag. 72, PI. IV, fig. 93). 

 Length 0,o93 mm. Breadth 0,oi3 mm. Carinal puncta 12 — 14, 

 strite 25 in 0,oi mm. 



N. JeUneckii Grun. (Arct. Diat. pag. 74). 



N. panduriformis Greg. var. 



N. dUuvialis CI. conf. pag. 150. 



Fseudoeunotia Doliolus (Wallich) Grun. (Van Heurck Syn. 

 PI. XXXV, lig. 22). 



Climacosphenia el oiigcd a -^ail. 



Surirella fluminensis Grun. (A. Schra. Atl. PI. V, fig. 6). 



S. Lorenziana Grun. (A. Schm. Atl. PI. V, fig. 5). 



S. patens A. Schm. (Atl. PI. VI, fig. 16—17). 



S. mexicana A. Schm. (Atl. PL VI, fig. 10—12). 



.S. Upida A. Schm. (Atl. PL IV, fig. 3—5). 



S, cuneata A. Schm. (Atl. PL IV, fig. 1). 



S. orhicidaris CI. N. Sp. — Valve orbicular, 0,075 mm. in 

 diameter. Canaliculi distant 1 — 1 ^ i in 0,oi 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 

 stride in 0,oi mm. — This beautiful species should perhaps be 

 more correctl}" arranged in the genus Campylodiscus, where it 

 seems to come near to C. Helianthus, but I think neverthe- 

 less it is most nearlv related to Surirella fastuosa. — PL 38, 



fig. 79, -T. 



Campylodiscus undnlatus Grev. (A. Schm. Atl. PL XVIIL 

 iig. 11). 



C. decorus Breb. (A. Schm. Atl. PL XIV, fig. 4—5). 



C. Ealfsii W. Sm. (A. Schm. Atl. PL XIV, fig. 1). 



C. crehrecostatus Grev. (A. Schm. Atl. PL XV, fig. 16—17). 



C. suhangidaris Grun. (A. Schm. Atl. PL XVIII, fig. 5-6). 



C. denseco status CI. — Diam. 0,o84 mm. Canaliculi numerous, 

 6 in 0,01 mm., reaching to the median raphe and interrupted 

 by a circular furrow, V* of the radius distant from the mar- 

 gin. — PL 38, fig. 76. 



C. limhatus var. mimda CI. — Diam. O,o27 — 0,o35 mm. Cana- 

 liculi about 9 in 0,oi mm. — PL 38, fig. 77. 



Bd III. 33 



