KOFOID AND SWEZY: UNARMOKED DINOFLAGELLATA 283 



5. Body rotund ellipsoidal, girdle with distinct overhang, length over 60^ melo sp. nov. 



5. Body rotund, length less than 60/t foliaceum nom. sp. uov. 



6. Plasma colored 7 



6. Colorless, small fresh-water species hyalinum (Schilling) 



7. Over 140/x long 8 



7. Less than 140;ii long 9 



8. Body slender fusiform, peripheral zone of rodlets acutum (Sehiitt) 



8. Body suhovoidal, no peripheral rodlets, plasma vacuolated spumantia sp. nov. 



9. More than 90;u, long 10 



9. Less than 90jli long 14 



10. Sulcus with torsion of 0.5 transdiameter contortum (Sehiitt) 



10. Sulcus without toi-sion 11 



11. Girdle displaced 0.5 length of body lachryma (Meunier) 



11. Girdle displaced less than 0.5 length of body 12 



12. Body fusiform 13 



12. Body rotund ellipsoidal flavidum sp. nov. 



13. Body with attenuate apices tusiforme nom. sp. nov. 



13. Body with blunter apices, antapex with flaps or sulcus cornutum (Pouchet) 



14. Sulcus with torsion 15 



14. Sulcus without torsion 18 



15. Torsion of sulcus, one turn intortum sp. nov. 



15. Torsion less than one turn 16 



16. Leugtli of body less than 2 transdiameters, color yellow flavescens sp. nov. 



16. Length of body more than 2 transdiameters 17 



17. Length of body 3.5 transdiameters, epicone attenuate biconium sp. nov. 



17. Length less than 3 transdiameters, epicone stouter ovatum (Gourret) 



18. Small species, less than 35/i in length 19 



18. Length more than So/x 20 



19. Body stout, length 1.4 transdiameters ovum (Sehiitt) 



19. Body more slender, length 2.2 transdiameters parvulum (Sehiitt) 



20. Rose colored granules present culeus sp. nov. 



20. No rose colored granules , 21 



21. Girdle displaced more than 1 transdiameter mitra nom. sp. nov. 



21. Girdle displaced less than 1 transdiameter 22 



22. Apices prolonged in rounded horns caudatum sp. nov. 



22. Apices not prolonged 23 



23. Body broadly biconical, antapex pointed truncatum s]). nov. 



23. Body ellipsoidal, apices broadly rounded 24 



24. Length more than 1.5 transdiameters dorsum sp. nov. 



24. Length less than 1.5 transdiameters 25 



25. Color primuline yellow, length 72/t ovoideum sji. nov. 



25. Color orange green capsulatum sp. nov. 



27. Striae on epicone only, rose red pigment cuneatum nom. sp. nov. 



27. Striae on both epicone and hypocone .'. 28 



