KOFOID AND SWEZY: UNARMORED DINOFLAGELLATA 179 



51. Epieone concave conical, girdle submedian, scarcely displaced dogieli sp. nov. 



51. Epicene convex, subhemispherical, girdle slightly displaced 52 



52. Epieone about 0.35 total length amphora sp. nov. 



52. Epieone nearly 0.5 total length pachydermatum sp. nov. 



53. Hypocone bifurcated about 0.8 its length, color pink bifurcatum sp. nov. 



53. Hypocone not bifurcated, color greenish grey gleba Scluitt 



54. Surface striate or furrowed 55 



54. Surface not striate or furrowed 57 



55. Coarsely striate, girdle scarcely displaced, submedian wilczeki Pouchet 



55. Finely striate, girdle premedian, at least proximally 56 



56. Girdle distinctly premedian, scai'cely displaced, epieone low conical situla sp. nov. 



56. Girdle premedian proximally, displaced 2 furrow widths, epieone hemispherical 



radiatum sp. nov. 



57. Body dorsoventrally compressed, fresh-water tenuissimum Lauterborn 



57. Body not compressed, marine sphaericum Calkins 



58. Length 3 or more transdiameters 59 



58. Length less than 3 transdiameters 60 



59. Length 210,a, girdle submedian cucumis Schiitt 



59. Length 47/*, girdle far anterior vestifici Schiitt 



60. Pigment present 61 



60. Pigment not present 62 



61. Girdle premedian, striae on hypocone more numerous than on epieone, rose red 



rubrum sp. nov. 



61. Girdle submedian, striae equal in number on epieone and hypocone, rose red 



lineatum sp. nov. 



62. Length less than 20/i, apical point deflected to left hamulus sp. nov. 



62. Length over 20/i, apical point, if present, not strongly deflected 63 



63. Red or pink 64 



63. Not red or pink ! 65 



64. Fresh-water habitat, striae equal on epieone and hypocone helveticum Penard 



64. Marine habitat, striae more numerous on hypocone heterostriatum nom. sp. nov. 



65. Girdle not displaced, body biconieal, yellow diploconus Schiitt 



65. Girdle displaced 66 



66. Length more than 2 transdiameters 67 



66. Length le.ss than 2 transdiameters 68 



67. Body biconieal, apices tapering, length 65/t attenuatum sp. nov. 



67. Body elongate ellipsoidal, length lOOju multilineatum sj). nov. 



68. Colorless, translucent, or bluish 69 



68. Color yellow 71 



