178 MEMOIRS OF THE UNJVERSITY OF CALIFORNIA 



32. Girdle postmedian, greyish green, 48/x dissimile sp. nov. 



32. Girdle median or submedian 33 



33. Length equaling transdiameter, sulcal notch present incisum sp. nov. 



33. Length more than 1.2 transdiameters 34 



34. Length over 2.5 transdiameters, cyst arcuate bicome sp. nov. 



34. Length less than two transdiameters 35 



35. Lengtli 1.8 transdiameters, 47/t, girdle displaced 0.3 transdiameter.. ..scopulosum sp. nov. 



35. Length less than 1.5 transdiameter, girdle slightly displaced 36 



36. Spherical and lunate cysts common, free form 22^, 1.22 transdiameters Itinula Schiitt 



36. Cysts unknown, length 62ju, 1.4 transdiameters auratum sp. nov. 



37. Fresh-water species, girdle postmedian, length less than 30/x vorticella Stein 



37. Marine species 38 



38. Large species, length 200;t<. ...pyrocystis Jorgensen 



38. Less than lOO/i in length 39 



39. Girdle postmedian, body broadly ellipsoidal minor Lebour 



39. Girdle premedian or nearly so 40 



40. Body slender biconical filum Lebour 



40. Body spheroidal ovulum sp. nov. 



40. Body ovoidal, dorsoventrally compressed marinum Saville-Kent 



41. Body with thickened periplast, striate or non-striate, Pachydinium subgen. nov 42 



41. Periplast thin, striate, Lineadinium subgen. nov 58 



42. Large species, over 100^ in length 43 



42. Less than lOOju, in length 54 



43. Surface striate or furrowed 44 



43. Surface not marked with striae or furrows 50 



44. Striae subequal on epicone and hypocone 45 



44. Striae more numerous on hypocone 47 



45. Girdle premedian, striae broken, surface rough, color pink abbreviatum sp. nov. 



45. Girdle submedian 46 



46. Epicone contracted obliquely on dorsal surface, greenish canus sp. nov. 



46. Epicone sjinmetrical, pink costatum sp. nov. 



47. Color blue, girdle median coeruleum Dogiel 



47. Color not markedly blue, girdle premedian 48 



48. Length over 2 transdiameters at girdle, epicone conical gracile Bergh 



48. Length not over 2 transdiameters 49 



49. Epicone 0.35 total length, color onion-skin pink puniceum sp. nov. 



49. Epicone 0.40 total length, color greyish green lira sp. nov. 



50. Surface roughened by alveolar layer, ectoplasm distinct 51 



50. Surface smooth, ectoplasm not distinct 53 



