24 P. T. CLEVE, ON SOME NEW DIATOMS. 
2. Triceratium (Hydrosera; Terpsinoé) Javanicum Cu. N. Sp. 
Valve plane, hexagonal, with three angles separated from the disc by transverse 
lines (diaphragms) and alternating with three other angles, which are contigous with 
the disc. One of the three latter angles has near the apex a small transvere fissure 
corresponding to the appendages on Hydrosera triquetra Watuics. Structure irre- 
gular 5—7-gonal cells, 4—5 in 0,01 mm., absent from the ends of the three first named 
angles. F. W. Rectangular with longitudinal furrows, corresponding tv the sinuses 
between the angles. 
Diam. 0,075 mm. 
Pl Vi tee, OO" 
Java, Batavia in brackish water (Eugenie Exp.). 
This form is so nearly related to Hydrosera triquetra Watuica Micr. Journ. VI, 
p. 251, Pl. 18, fig. 1—6, that it perhaps might be more correctly regarded as a mere 
variety. 
3. Triceratium dubium Brw. 
Micr. Journ. VII, p. 180, Pl. 9, fig. 12 is the triangular form of 7. bicorne Cu. 
(Bih. t. K. Sv. Vet.-Ak Handl. Pl. 5, fig. 30). 
4. Triceratium Tripos Cu. N. Sp. 
Outline in the S. V. almost orbicular or triangular with very broad and rounded 
angles. Processes three near the angles. Structure a somewhat coarse and irregular 
cellulation of hexagonal cells, about 5 in 0,01 mm. In the F. V. the valve is elevated, 
sloping regularly from the apex to the margins. The three processes are strong and 
and project somewhat obliquely. 
Diam. of the valve 0,0525 mm. 
Pi. Vi, fig Fey 
Gallapagos Islands (Eugenie Exp.). 
5. Triceratium Anderssonit Cu. N. Sp. 
This very rare and exceedingly fine species, of which I have found only one in- 
complete specimen, is quadrangular with straight sides and rounded angles, upon which 
are large truncate processes. The structure consists of branching veins, radiating from the 
centre to the margins, and of tolerably coarse cellules, about 5 in 0,01 mm., of which 
two rows fill the space between each pair of lines. 
Greatest diameter 0,09 mm. 
PL. VIE, fie 69; Oh 
Gallapagos Islands (Eugenie Exp.). 
The structure of this remarkable species, which I have named in honour of the 
late Prof. N. J. Anpersson, is that of a Stictodiscus. 
