6 Prof. W. Smith on the Diatomacese of the Pyrenees. 



Cymbella Scotica 6 



Scotica jS 5 



ventricosa 18 



■ affinis 8 



■ sequalis 2 



maculata 2 



• lunata 2 



cuspidata 6 



Ampbora ovalis 9 



Cocconeis Pediculus 4 



Placentula 17 



Thwaitesii 4 



Cyclotella operculata 5 



Rotula 1 



Campylodiscus costatus 2 



costatus j3 I 



spii'alis 2 



Surirella biseriata 5 



linearis 7 



■ pinnata 3 



angusta 1 



Trj'blionella acuminata 1 



angustata 3 



Cymatopleura elbptica 1 



apiculata 1 



Nitzschia linearis 9 



tenuis 3 



Ampbioxys 2 



media 1 



sigmoidea 1 



Navicula gibberula 3 



e\h\:)tica, Kilfz 15 



trinodis 3 



cryptocepbala 6 



firma 4 



firma, var . ^ 8 



firma, var. y 4 



rhomboides 6 



Pinnularia bemiptera 10 



Stauroneis anceps 3 



gracilis " 



punctata 3 



linearis 2 



Pleurosigma attenuatum 3 



Synedra Ulna 24 



Ulna/3 2 



lunaris o 



tenera " 



debcatissima 2 



Gomphonema constrictum 8 



capitatum 2 



capitatum /3 8 



tenellum 16 



msigne 



1 



crassmervia 



Ampbisbsena 2 



angustata 6 



Isevissima 4 



• Bacillum 2 



Pinnularia viridis 16 



■ nobilis 2 



radiosa 3 



oblonga 1 



gracillima 6 



borealis 8 



gibba 1 



interrupta 3 



Tabellaria 2 



major 4 



acuminata 2 



lata 2 



Stauroneiformis 6 



dichotomum 8 



acuminatum 5 



acuminatum /3 2 



obvaceum 1 



Cocconema lanceolatum 10 



■ cvmbiforme 6 



— Cistula 5 



Meridion circulare 9 



circulare j3 2 



constrictum 1 



Himantidium pectinale 6 



majus 2 



gracile 5 



bidens o 



Arcus 6 



Odontidium byemale 26 



mesodon H 



Harrisonii /3 5 



• mutabile 3 



Tabellaria 2 



Denticula obtusa 2 



—tenuis 1- 



ocellata 2 



• sinuata 4 



Fragilaria capucina 3 



virescens 1 



Acbnantbes exilis 12 



Acbnantbidium lanceolatum ... 6 



Diatoma graude 5 



Tabellaria flocculosa 9 



Melosira varians 4 



Ortbosira arenaria 2 



spinosa 4 



punctata 2 



Mastogloia Smitbii 2 



Grevillii 2 



Eneyonema prostratum 4 



csespitosum 1 



CoUetonema neglectum 2 



vulgare 3 



