KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. [8. N:o 9. 23 
Biddulphia Gray. 
1. Biddulphia Moronensis Cu. N. Sp. 
Valve in S. V. oval, stout, with two strong transverse coste and two large and 
stout oval processes. Structure: large, irregularly scattered puncta on the valve and 
fine dots arranged in irregular lines on the processes. 
Length of the valve 0,12 mm. Breadth 0,07 mm. 
Pl. TY, fig. 56, *°%),. 
Moron deposit in a slide from Mr. J. D. Mouuer. 
2. Biddulphia tentaculifera Cu. N. Sp. 
Valve elevate, covered with tolerably large puncta arranged irregular lines aronud 
the centre of the valve. No coste are visible. Processes elongate, club shaped. 
Diam. of the valve 0,05 mm. 
Pl. V, figs 67, °°"), 
Keeling Island (Eugenie Exp.). 
3. Biddulphia Gallapagensis Cu. N. Sp. 
S. V. broadly oval, almost orbicular, with two short stout processes. Structure: 
pearly granules arranged in lines, radiating from the irregularly punctate centre to the 
margin, about 12—13 in 0,01 mm. 
Longest diameter 0,049 mm., shortest 0,04 mm. 
PiOWE te 
Gallapagos Islands (Eugenie Exp.). 
This form belongs, to the section of B. aurita, which contains a large number of 
nearly allied forms, as B. Roperiana, B. Edwardi Frpicer etc. 
Triceratium Exp. 
1. Triceratium (Hydrosera; Terpsinoe?) trifoliatum Cr. N. Sp. 
Valve plane, with concave sides and three 3-cuspidate angles, separated from the 
valve by transverse lines (incomplete diaphragms). Surface covered with small puncta 
arranged in irregular lines. 
Diam. 0,045 mm. Distance between two apices 0,05—0,06 mm. 
Pl. ¥1, fies: 71, 
New Zeeland in fresh or slightly brackish water collected by Mr. S. Berccren 
very rare. 
This curious species is remarkable for its freshwater habit and seems to be most 
nearly related to Hydrosera Wallich from the Ganges, but it is entirely different. 
