Cvclo/ella , Navicula tertnes, C. G. E. var. stauronei- 



formis, Melosira lyrata. 



N. 3. This is similar to N. 2, namely a fine sand having distri- 

 buiteci through it a very few fresh water Bacillaria, amongst which 

 is only a Himantidium which certainly can be distinguished. 



N. 4. A mass of Confervae in which could only be seen onc 

 or two valves of fresh water Bacillaria of no special interest. 



N. 5. A similar mass of Confervae in which no Bacillaria could 

 be seen. 



N. ó, 7, 8, 9, io, 11, 12 and i3 not examined. 



N. 14. Cocconeis pediculus, C. G. E., Cyclotella gigantea, n. sp., 

 C. Kuet^ingiana, C. A. A., Encyonema coespitosum, F. T. K., Melosira 

 lyrata, C. G. E., {Odontìdium?) Tetracvclus lacusiris J. R. 



I cali this form Cyclotella gigantea not because it is a good spe- 

 cies as we cali species but because it is so large, being the largest 

 of ali the Cyclotella. I have seen being about ,ooo85' in diameter. 

 The markings consist of coarse pinnulcs reaching about .ooo3' from 

 the periphery. The rest of the disc is plain. In fact it looks like an 

 immensely overgrown C. Kuel^ingiana, and is most likely that species, 

 more especially as C. Kuet^ingiana is also present in this gathering. 



N. i5. not examined. 



N. 16. Ni/Ischia {fluminensis var.) maj'uscula, A. G., {Odontìdium?) 

 Tetracyclus lacuslris, J. R., Raphoneis amphìceros, C. G. E., Stephano- 

 discus major, n. sp. 



I suspect that the form styled Nit^schia {fluminensi* var.) maj'u- 

 scula, A. G. is but an exagerated style of N. paradoxa — Pinnularia 

 paradoxa, G., S/epliatiodiscus major may be an exagerated form of Ste- 

 phanodiscus niagarae, C. G. E. but not only is it large (diameter 

 .oo65'j but the markings are continuous over the whole valve, being 

 hexagons 16 1 /, in .001'. The spines are also short. It is a beautiful 

 species looking like a finely marked Coscinodiscus with spines. 



Along with the specimens of rock and hardened clay there is 

 a slide also which Dr. Ilayden sent me which carne fron Poison 

 Springs and contains Amphipleura pellucida, Cocconema 

 Colletonema , Epilhemia gibba, C. G. E., Gomphonema 



, Pleurosigma , Surirella , Syne- 



dra 



