EXPLICATION |)KS PLANCHES 



KIL'. Pages 



I .Ir/llinnlhi-pl/lil H<inraillll Var. finrrlllrltl. Valve inlYTJelllv. . 1 "ill 



J f 'uri-iiiii'ix < 'hurcuii i, valve inferieure 51 



3 linperatru: A. Sch. var. opposita, valve inferieure 52 



4 fiinnala var. plena, valve sii|>erieuiv 53 



."i Triichynfi* . 1 .<// < !leve var. nnlnrriirn 59 



ti .\in'icula J.inin'il/i'i 55 



7 Schueltii V. Heurek var. /.rt'/x, face ronni'rlive 55 



8 Bon grain li 56 



'.I quadratarea A. Srh. var. antarrtirn 58 



1 1 1 Gourdiin ii 57 



1 1 rristata 56 



1^ llnlinii }'. Petit var. siririu 57 



l:; Ctiinii 58 



1 \ grticilis var. antarctica 57 



1 ."> pseudokryokonites 54 



Hi Xi'itonquei 57 



I 7 \iauroneis Charcolii : a. face connective; b. face valvaire 58 



18 Gomphonema Charcotii 63 



19 Groenlandicum var. clusa 63 



20 Amphora Petermannii 61 



21 Senonquti 61 



22 Bon grain ii 60 



*'.\ Gourdonii 60 



''. 



Charcotii 60 



'J- ' 



2lj liniceolata var. aperta 62 



27 var. robustn 63 



28 Livui'illri 63 



JM.AXCIIE III 



1 Tropidoneis Charcotii 64 



2 Frnilnria Rongrainii face valvaire 67 



^ face connective 67 



', sublinearis var. ambigua 68 



5 ( 'harcotii 68 



6 Californica var. antarctica 67 



7 Island ica var. producta 68 



8 var. stricta 68 



9 (t'l/lindrus (Iriin. var.'.'i \'nn lli'iin-lm 68 



In 'riiiiliiaaiiiiii'iiiii stflidn 



I I < 'i-i-dlnncin aiistralis var. gracilis 



| -1 T yp 67 



Charcol. >'EHAUAI.LH Diatuiiuies. !! 



