THE ANNALS 



AND 



MAGAZINE OF NATURAL HISTORY, 



[SECOND SERIES.] 



" perlitora spargite museum. 



Naiades, et circilm vitreos considite foiites : 

 Poll ice virgineo teneros hic carpite flores : 

 Floribus et pictiim, diva;, replete canistrum. 

 At vos, o Nymphs Craterides, ite sub undas ; 

 Ite, recurvato variata corallia trunco 

 Vellite muscosis e rupibus, et mihi conchas 

 Ferte, Deae pelagi, et pingui conchylia succo." 



N.Parthenii Giannettasii Eel. 1. 



No. 109. JANUARY 1857. 



I. — Notes of an Excursion to the Pyrenees in search of Diato- 

 maceffi. By William Smith, F.L.S., Professor of Natural 

 History, Queen's College, Cork. 



[With two Plates.] 



In the 'Annals^ for January 1855, I had the opportunity of 

 recording the results of a former excursion to the South of 

 France and the Auvergne : the same object, namely to collect 

 facts regarding the distribution of Diatomaceous forms, was the 

 main purpose of the journey whose outline I now lay before the 

 public. 



My views on the present occasion were directed to the western 

 shores of France, and the lofty range of granitic mountains 

 which forms its southern boundary ; and from the widely differ- 

 ent influences affecting the flora of the Bay of Biscay and the 

 Pyrenees, I anticipated results that would contrast, to some 

 extent, with those furnished by the shores of the Mediterranean 

 and the volcanic slopes of Mont Dore and the Puy de Dome. 



My route was as follows : — 



I crossed from Southampton to Havre on the Mth June 1856, 

 and spent a few days in exploring the mouth of the Seine and 

 the neighbouring shores. The marine species here collected 



Ann. <Sf Mac/. N. Hist. Ser. 2. Vol. xix. 1 



