THE ANNALS 



AND 



MAGAZINE OF NATURAL HISTORY. 



[SECOND SERIES.] 



" perlitora spargite museum, 



Naiades, et circdm vitreos considite foutes : 

 PoUice virgineo teneros h\c carpite flores : 

 Floribus et pictum, divae, replete canistrum. 

 At vos, Nymphs Craterides, ite sub undas ; 

 Ite, recurvato variata corallia trunco 

 Vellite muscosis e rupibus, et mihi conchas 

 Ferte, Dese pelagi, et pingui conchylia succo." 



N. Partheiiii Giannettasit Eel. 1. 



No. 37. JANUARY 1851. 



I. — Notes on the Diatomacefe ; with descriptions of British species 

 included in the genera Campylodiscus, Surirella and Cymato- 

 pleura. By the Rev. William Smith, F.L.S. 



[With three Plates.] 



Having devoted some attention to the examination of our 

 native Diatomacea, I have thought it might interest others engaged 

 in similar inquiries, if I made a record in the pages of the 'Annals' 

 of the species which have fallen under my notice, many of which 

 have not hitherto been described as British, nor been included 

 in any foreign work which I have had the opportunity of con- 

 sulting. 



A complete monograph of the family similar in extent and ex- 

 ecution to the admirable volume on the ' British Desmidiese ' is 

 much required, and it is to be hoped that his late sojourn on the 

 continent may have so far recruited the feeble health of Mr. Ralfs, 

 as to enable him at no distant day to undertake a work for which 

 he is so eminently qualified. In the mean time the following 

 notices may be acceptable, and serve to direct increased attention 

 to a class of objects which have hitherto received from the 

 English naturalist a much less careful examination than their 

 beauty and variety would seem to challenge from the amateur, 



Jnn. ^- Ma^. N. Hist. Ser. 2. Vol. vii. y 1 



