The body is somewhat cup-form, with a large, flat base. The anterior border is rounded, each of the ends being somewhat truncate and carrying a bundle of tentacles all capitate and similar. These may be continued internally as far as the nucleus (Sand). The cytoplasm is uncolored, but may contain some brilliant granules. The nucleus is granular, and spherical, band or horseshoe formed. [Illustration: Fig. 69.--_Trichophrya salparum_.] This species was found by Dr. G. Hunter on the branchial bars of the Ascidian _Molgula manhattensis_, where great numbers of them are often parasitic. LIST OF REFERENCES. AUERBACH, L. '54. Ueber Encystierung von Oxytricha pellionella. Zeit. wiss. Zool., V, 1854. ---- '55. Ueber die Einzelligkeit der Amoeben. Zeit. wiss. Zool., VII, 1855. BALBIANI E. G. '61. Recherches sur les phénomènes sexuelles des Infusoires. Jour. de la physiol:, IV, 1861. ---- '85. Sur un Infusoire parasite du sang de l'Aselle aquatique. Rec. zool. Suisse, II, 1885. BERGH, R. S. '79. _Tiarina fusus_ Cl. & Lach. Vid. Med. f. d. Nat. Foren. Kjobenhavn. ---- '82. Der Organismus der Cilioflagellaten. Morph. Jahr., VII, p. 177. BRADY, H. B. '79. Report on the Foraminifera dredged by H. M. S. _Challenger_ during the years 1873-1876. Challenger Reports, Zoology, IX. BRANDT, K. '96. Die Tintinnodeen. Bibliot. Zoolog., XX, 1896. BÜTSCHLI, O. '76. Studien über die ersten Entwickelungsvorg. der Eizelle, die Zelltheilung, und die Conjugation der Infusorien. Abhand. der Senck. naturf. Ges. Freiburg, X, 1876. ---- '83-'88. Die Protozoen. Bronn's Klassen u. Ord. des Tierreichs. CARPENTER, W. B. '56. Researches on the Foraminifera. Phil. Trans. (2), p. 547. CARTER, H. J. '56. Notes on the fresh-water Infusoria of the island of Bombay. Ann. Mag. Nat. Hist. (2), XVIII. ---- '63. On the coloring matter of the Red Sea. Id. (3), XI. ---- '63a. On _Amoeba princeps_ and its reproductive cells. Id. (3), XII. ---- '64. On fresh-water Rhizopods of England and India. Id. (3), XIII, p. 13. ---- '65. On the fresh- and salt-water Rhizopods of England and India. Id. (3), XV, p. 277. CIENKOWSKY, L. '55. Bemerkungen über Stein's Acinetenlehre. Bull. Phys. Math. Acad., St. Petersburg, XIII, p. 297 (also in Ann. Mag. Nat. Hist. (3), XIII). ---- '55. Ueber Cystenbildung bei Infusorien. Zeit. wiss. Zool., VI, p. 301. ---- '61. Beiträge zur Kenntniss der Monaden. Arch. f. mik. Anat., I, 1865, p. 203. CLAPARÈDE, E. '54. On _Actinophrys sol_. Ann. Mag. Nat. Hist. (2), XV, 1854. ---- '60. Recherches sur les annélides, etc., observés dans les Hébrides. Mém. Soc. phys. d'hist. nat., Genève, XVI, 1860. ---- '67. Miscellanées zoologiques. Ann. d. sc. nat. zool. (5), VIII, 1867. CLAPARÈDE ET LACHMANN '58-'60. Etudes sur les Infusoires et les Rhizopodes. Mém. Inst. genèvoise, V, VI, VII.