P. T. CLEVE. DIATOMS FROM JAVA. 



and the umbilical lines, passing from the top and the sides of 

 the median one. angularly bent in the middle. Diam. 0,uöi m.m. 

 Pl. I fig. 2. 



Somewhat rare resembles most A. Ralfsianum NoBM. ( = 

 A. heptactis Elfs.) but seems to be different from that species, 

 of which I unfortunately haVe not any specimen for compa- 

 rison. The central (umbilical) space is verv small and the ccllules 

 near the radii are not much larger than the other. 



11. Triceratium annulatum Wallich (M. J. Vol. VI pag. 

 249. Pl. XII fig. 19) very rare. 



12. Triceratium undulatum Beightw. (M. J. Vol. VI pag. 

 154 Pl. VIII fig. 1—5) not rare. 



This species has been before found in tlie JMonterey earth 

 and also near the coast of Sussex, England. 



13. Triceratium Favus var. spinigernm N. var. 



Small with only few large hexagonal cellules. Each side 

 of the frustule has two smaller projecting spines. This form re- 

 rainds one of T. muricatinn Brtw. but it has two spines on each 

 side just as T. Rohertiamnn. Gkev. 



Extremely rare, only one specimen observed. Pl. I fig. 3. 



14. Biddulphia Indica (Ehkb.) Roper (T. M. S. VII pag. 1(5. 

 Pl. II fig. 20 — '2'!) Somewhat rare. Found before in Xatal 

 {Shcidholt). 



15. Biddulphia Chinensis Grev. (T. 'M. S. u. s. Vol. XIV 

 pag. 81. Pl. IX fig. IG). Xot very rare. Found before near 

 Hono- Konof. 



16. Hemiaulus Heibergii Cl. N. sp. SidevicAv elliptical. 

 Frontview narrow, almost linear, with long, slender, subacute 

 processes; valves with numerous puncta, arranged in somewdiat 

 irregular lines. 



Breadth on fr. w. 0, 11,51 m.m. 

 Xot very rare. Pl. 1 fig. 4. 



The frustules are arranged in long, concatenated chains. 

 which have large quadrate foramina. 



17. Hemiaulus membranaceus Cl. N'. sp. Scarcely siliceous, 

 valve without any markings. Frontview broadly linear, with | 



