b DONKIN^ ON DIATOMACEiE. 



Biddulphia rhombus, Sm. Grammatophora marina, 

 „ turgida, Sm. „ Kiitz. 



Gomphonema marina, Sm. serpentina, Kiitz, 



Achnanthes brevipes, Ag. Melosira nummuloides, Kiitz. 



;,, subsessilis, Kiitz. Ortliosira marina, Sra. 



Rhabdonema arcuatum, Kiitz. Isthmia enervis, Ehr. 



,j minutum, Kiitz. Schizonema cruciger, Sm. 



Section II. — Species discovered since the publication of 

 Professor Smith's Synopsis. 



Eupodiscus sparsus, Greg. Trans. Micr. Soc. vol. y, pi. 

 1, fig. 47). 



Eupodiscus tesselatus. Roper. (Micr. Journal^ vol. vi, 

 pi. iii, fig. 1). 



Coscinodiscus concavus, Ehr. (Greg, in Trans. Royal Soc. 

 Edin. vol. xxi, part iv, pi. 2, fig. 47). 



Coscinodiscus nitidus, Greg. (Trans. Royal Soc. Edin. 

 vol. xxi, part iv, pi. 3, fig. 45). 



Coscinodiscus ovalis. Roper. (Micr. Journal, vol. vi, pi, 

 3, fig. 4). 



Amphiprora plicata, Greg. (Trans. Royal Soc. Edin, vol. 

 xxi, part iv_, pi. 4, fig. 57). 



Amphiprora complexa, Greg. (Trans. Royal Soc. Edin. 

 yol. xxi, part iv, pi. 4, fig. 62.) 



Amphiprora maxima, Greg. (Trans. Royal Soc. Edin. 

 vol. xxi_, part iv, pi. 4, fig. 61). 



Amphiprora pusilla, Greg. (Trans. Royal Soc. Edin. vol. 

 xxi, part iv, pi. 4, fig. 56). 



Amphora Grevilliana, Greg. (Trans. Royal Soc. Edin. 

 vol. xxi, part iv, pi. 5, fig. 90). 



Amphora cymbifera, Greg. (Trans. Royal Soc. Edin. vol. 

 xxi, part iv, pi. 6, fig. 97). 



Amphora robusta, Greg. (Trans. Royal Soc. Edin. vol. 

 xxi, part iv, pi. 4, fig. 79). 



Amphora Ic&vis, Greg. (Trans. Royal Soc. Edin. vol. xxi, 

 part iv, pi. 4, fig. 74). 



Amphora Icevissima, Greg. (Trans. Royal Soc. Edin. vol. 

 xxi, part iv, pi. 4, fig. 72) . 



Navicula granulata, De Breb. (Trans. Micr. Soc. Lond. 

 vol. vi, pi. 3, fig. 19. 



Navicula clavata, Greg. (Trans. Micr. Soc. Lond. vol. 

 iv, pi. 5, fig. 17). 



Navicula angulosa, Greg. (Trans. Micr. Soc. vol. iv, pi. 

 5, fig. 8). 



Navicula rectangulata, Greg. (Trans. Royal Soc. Edin. 

 vol. xxi, pi. i, fig. 7). 



