22 P. T. CLEVE, ON SOME NEW DIATOMS. 



Cyclotella Kutz. 



1. Cyclotella Meneghiniana var.? stelliqera Cl. et Grun. 



Disc with marginal stri«, about 14 in 0,01 mm., and with a central står of ra- 

 diating lines, alternately shorter and larger. 

 Diam. 0,022 mm. 



Pl. V, fig. 63, ^°"7i- ö;. Specim. from New Zeeland; c. small specimen fronj 

 Lac de Gerardmer (Vosgues). 

 New Zeeland, Rotorua Lake, coll. by S. Berggren. 



Another variety stellulifera Grun. is repi^esented by the fig. b. and is characte- 

 rized by the granulate striai. 



Liradiscus Grev. 



1. Liradisciis (?) Capensis Cl. N. Sp. 



Circular, with a narrow, striate margin (with 15 strise in 0,01 mm.). Disc co- 

 vered with curved and branching, but not anastomosing lines or markings, which do 

 not form a coherent network. 



Diam. 0,04 mm. 



Pl. V, fig. 61, "7i. 

 Marine, Cape of Good Hope in a slide sent by Mr. F. Hauck. 



Of the genus Liradiscus only four species are known, all fossil from Barbados 

 deposit. Our form, if it really belongs to Liradiscus, is the first known as recent. It 

 is doubtful if it not would be better to place it in Cyclotella, as it has some relation- 

 ship to C. striata Kutz. or C. Dallasiana. 



Auliscus Bail. 



1. Auliscus (?) insignis Cl. N. Sp. 



Disc almost orbicular with 2 rounded, not truncate processes, and divided by a 

 large cruciform blank area in to four compartments. The compiirtments have a very 

 singular structure and seera to be covered with irregular depressions, la the F. V. they 

 are elevated and the processes rounded. 



Diam. 0,12 mm. 



Pl. V, fig. 64, a. "y,, S. V. b. '»Vi, F. V. 



Gallapagos Island extremely rare (Eugenie Exp.). 



I am unacquainted with any Auliscus having the rounded processes of this glo- 

 rious species; it should perhaps be placed in the genus Cerataulus. 



Annother remarkable species of Auliscus (A. Ralfsianus Grev.) hitherto known 

 only in a fossil state from the Barbados Deposit, occurs in the extremely interesting 

 Gallapagos material. 



