18 NORDSTEDT, DESMIDIE^E ARCTO^E. 



6. C. Portianum Arch. (Micr. Journ. VIII, pag. 235, tab. 11, 

 fig. 8 et 9). 



Forma minor, incisura mediana minus profunda, gra- 

 nulis in series horizontaliter dispositis. Cum Cosm. orbi- 

 culari De Bary Conjug. tab. 6, fig. 49 et 50 fere prorsus 

 congruit, sed non tam latus. 



Long. 28 — 32 f,i, lat. 20 —22 (.i, crass. 18 j.t, lat. isthihi 

 12-13 (i. 



Ad Recherchebay, Adventbay, Cap Thordsen, Mosselbay. 



7. C. cymatopleurum NoRDST. 



Long. 85—92 ^, lat. 64 /<, lat. isthmi 28—30 p. 

 Ad Skansbay. 



8. C. holmiense Lund. a (Cfr. Nordst. Desm. Spets. p. 28). 



Ad Cap Thordsen (Sauriehook), Skansbay (forma maxi- 

 ma: long. 98 /.i, lat. 51 /.i, lat. isth. 27 f.i, lat. apic. 36 yi). 

 ß. integrum LüND. 



Ad Sydcap, Recherchebay, Green Harbour, Skansbay. 

 Cap Thordsen, Fairhaven, Mosselbay. 



9. C. homalo dermum nov. sp. Tab. VI, fig. 4. (Cosm. pyra- 

 midatum forma intermedia mihi in Bidr. Sydl. Norg. Desm. 

 (Act. Univers. Lund., tom IX, 1873) pag. 19). 



C. medioere, diametro circiter quinta parte longius, pro- 

 funde constrictum, sinu lineari angusto extremo ampliato; 

 semicellulee trapeziese e basi subreniforme sursum subito 

 angustatse lateribus subrectis 1. levissime retusis, dorso trun- 

 cato seepe levissime retuste, angulis superioribus obtusis, in- 

 ferioribus late rotundatis; a vertice visre elliptico-oblongae, 

 medio quam levissime tumidae; a latere conspectee ovata?. 

 Latitudo apicis dimidio diainetri transversalis corporis paulo 

 minor. Corporis crassitudo duse partes diametri transver- 

 salis. Membrana subtilissime (seepe indistinete) punctata. 

 Nuclei amylacei . . .? 



Long. 54—66 y, lat. 48—51 y, crass. 29—33 y, lat, 

 isthmi 18 — 19 y, lat. apic. circ. 19 — 20 y. 



