DIATOMACEJE— MR FRED. KITTON. 403 



DIATOMACE/E, 



By FEED. KITTON, Hon. F.R.M.S., &c. 



The washings of some aquatic plants from Socotra were placed in my hands 

 by the late Lieut.-Col. H. H. Godwin Austen, F.R.S., for the purpose of 

 identifying the diatoms contained in it, and the result of the examination is 

 ^iblished in the Journal of the Linnean Society, Botany, vol. xx. 1884, pi. 48. 



After eliminating the vegetable matter and coarse sand, the diatomaceous 

 remains were small in quantity; the words "rare," "not uncommon," &c, 

 must therefore be considered as referring to the materials at my disposal rather 

 than to the abundance or scarcity of the species on the island. 



Tribe 1. Raphtdie^. 



Family 1. CYMBELL^]. 

 1. AMPHORA. 



Amphora, Ehr. 1831. 



A. ovalis, Ehr. Monatsb. Berlin 1840 ; Kiitz. Bacill. 1844, 107, t. 5, f. 

 25; Smith Synops, i. 19, t. 2, f. 26; H. L. Smith, "Lens." ii. 80, t. 11, f. 17 ; 

 Schmidt Atlas cl. Diatom. 26, f. 106 ; Van Heurck Synops. 59, t. 1, f. 1 ; Kitton 

 in Journ. Lin. Soc. xx. 515. 



Socotra. Frequent. 



Distrib. A widely distributed species, occurring in fresh and brackish 

 water. 



2. CYMBELLA. 

 Cymbella, Agh. 1839. 



1. C. lanceolatum, Ehr. 



Cocconema lanceolatum, Ehr. Infus. t. 19, f. 6 ; Kiitz. Bacill. 81, t. 6, f. 3 ; Dujardin Infus. 4 

 Hass. Alg. t. 101, f. 1 ; Smith Synops. i. 75, t. 23, f. 219 ; Schmidt Atlas d. Diatom, t. 10, 

 ff. 8-10 ; Kitton in Journ. Linn. Soc. xx. 515. 



Socotra. 



Distrib. A widely distributed species. 



