SPERMATOGONIA. 



SPERMATOGONIA LEUD. FORTM., 1892. 



S4i 





Fig. 289. 

 Spermatogonia antiqita. 



" In the form of a spermatozoa with triangu- 

 lar head, a linear body which tapers to a point 

 with inflation at the lower third. Capitate striae 



on the margins. 



(Leud. Fortm.). 



A single form : Spermatogonia antiqita represented 

 in the text (fig. 289) after Dr. Leuduger-Fortmorel. 



Mergui Archepelago. Java. 



Is it a diatom ? 



CHELONIODISCUS PANT., 1869. 



Frustules with subcircular valves, convex, mucronate at the poles. 

 Superior valve vaguely striolate, flamiform, furnished with coarse 

 confluent elevations, reaching to the margins, one of which is longi- 

 tudinal and inserted in one of the apices, and two are transversal ; 

 inferior valve indistinctly striolate flamiform. 



Fig. 290. Cheloniodiscus Ananiensis. 



A single species, Cheloniodiscus Ananiensis, Pant., found in Ananino, 

 represented in the text after one of my photographs (fig. 290). This form, 

 which I can only class as a diatom with great doubt, is arranged by Dr. 

 Pantocsek among the Biddulphieoe. 



