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



Cymbella Scotica 6 



Scotica i3 5 



ventricosa 18 



affinis 8 



ajqualis 2 



maculata 2 



lunata 2 



cuspidata 6 



Amphora ovalis 9 



Cocconeis Pediculus 4 



Placentula 17 



Thwaitesii 4 



Cyclotella operculata 5 



Rotula 1 



Campylodiscus costatus 2 



costatus /3 I 



spiralis 2 



Surirella biseriata 5 



linearis 7 



pinnata 3 



angusta 1 



Tryblionella acuminata 1 



angustata 3 



Cymatopleura elliptica 1 



apiculata 1 



Nitzschia linearis 9 



tenuis 3 



Amphioxys 2 



media 1 



sigmoidea 1 



Navicula gibberula 3 



elliptica, Jfifw?^: 16 



trinodis 3 



cryptocephala 6 



firma 4 



firma, var. /3 8 



firma, var. y 4 



r-' rhomboides 6 



crassinervia 8 



Amphisbaena 2 



angustata 6 



lajvissima 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 



Pinnularia hemiptera 10 



Stauroneis anceps 3 



gracilis 6 



punctata 3 



linearis 2 



Pleurosigma attenuatum 3 



SynedraUlna 24 



Ulna/S 2 



lunaris 6 



tenera G 



delicatissima 2 



Gomphonema constrictum 8 



capitatum 2 



capitatum jS 8 



tenellum 16 



insigne 1 



dichotomum 8 



acuminatum 5 



acuminatum /3 2 



olivaceum 1 



Cocconema lanceolatum 10 



cymbiforme 6 



Cistula 5 



Meridion circulare 9 



circulare /3 2 



constrictum 1 



Himantidium pectinale 6 



majus 2 



gracile 6 



bidens 6 



Arcus 6 



Odontidium byemale 26 



mesodon 11 



Harrisonii /3 5 



mutabile 3 



Tabellaria 2 



Denticula obtusa 2 



tenuis 12 



ocellata 2 



sinuata 4 



Fragilaria capucina 3 



virescens 1 



Achnanthes exilis 12 



Achnanthidium lanceolatum ... 6 



Diatoma grande 6 



Tabellaria flocculosa 9 



Melosira varians 4 



Orthosira arenaria 2 



spinosa 4 



punctata 2 



Mastogloia Smithii 2 



Grevillii 2 



Encyonema prostratum 4 



caespitosum 1 



Colletonema neglectum 2 



vulgare 3 



