LE 
155. 
156. 
«Bo dubium Brw. (Mier. Journ. VII pag: 180 Pl. 9 fi 
BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND. 5. N:O 8 17 
middle of the valve secms to be elevated and the angles 
obliquely projeeting. Diam. 0;053 m.m; | Fig. 29: 222. 
Virgin Ids. St. Bartholomew, rare. 
T. eruciatum RaAB. & JAN. (Amphitetras cr. RAB. & JAN. 
Hond.:pag. 4 Pl lfisk5j Virgin, fds; motirare. 
mölbullosum: 0. WMizw Mus Godeffr. HH: I Pa2g: dt 
fig. 4) Virgin Ids., not rare. 
Triceratium (or Biddulphia) bicorne C1. N. Sp. Sideview 
with two more elongated and protracted angles and with 
two more blunt. Margins striate. Scurpture large and 
somewhat irregular hexagonal cells. Connecting mem- 
brane finely punctate, with puncta arranged in lines, about 
8 in 0,91 m. m. — Distance between angles 0,059 m. m. 
Ia SEN 
St. Bartholomew. I have found this species im a gathe- 
from Java and from California. 
Selrsnaltennans. BAI: (WE Sm Bi DIE pas 20rRIKST TS: 
45, Pl. 30 fig. 45. T. variabile Brw. Mier. Journ. IV 
pag. 275 PI. 17 fig. 19) St. Bartholomew, abundant. 
3. IV Tabellarium Brw: (M. J. IV pag. 275 PI 17 fig. 15. 
Ti venulosum Grev. T: Miecr. Soc. XII pag. 90 PL 13 fig. 
21. T. brevinervium Grev. L. c. Pl. 9 fig. 26) Virgin Ids. 
rare. The only specimen found is represented by the 
fig. 31 5907 It agrees very well with T. brevinervium. 
Distance betwen angles 0,0425 m. m. I have seen seve- 
ral specimens in gatherings from Gallopagos Ids. and from 
Campeche Bay, which seem to prove that T. Tabellarium 
venulosum and brevinervium are not specifically distinct. 
. T. undulatum Brw. (Micr. Journ. VI pag. 154 Pl. 8 fig. 
1—35 and 3) St. Bartholomew, several specimens agreeing 
with the fig. 8 of Btw. 
T. orbicuwlatum SHADB.? (Grun. Micr. Journ. 1877 P1. 196 
fig. 2 b.) St. Bartholomew, rare. 
FEupodiscus (Pseudoauliscus) radiatus BA. (Smiths. Con- 
trib. II 1852, 39) Virgin Ids., St. Bartholomew. 
This species, of which I have never seen a good figure, 
resembles Auliscus Peruvianus (A. SCHM; Atl.. PI:,32 fig. 29) 
but 
the processes are 4 and closer to the margin. "The cel- 
lule are larger and there are no marginal dots. 
