The first figure following the author's name refers to the full title of the original publication given in the bibliography at the end of the check list. The second figure gives the page of the original publication. The last figures are those of the year of publication. The capital letters refer to the formation and horizon. Species no longer considered valid, owing to previous description, are italicized. Comments are by the compiler. An * indicates that the species has not been figured. The localities are usually those given by the author of the species.

• PROTOZOA.
  Although the cretaceous rocks of Texas are mostly of foraminiferal origin, including innumerable microscopic species now being studied in the geological laboratory of the survey, none of them have been recorded except the following conspicuous microscopic forms:
  • NODOSARIA TEXANA, Con. , 2, 159, 1857.
    W. Between El Paso and Frontera. Occurs also in vicinity of Fort Worth, 700 miles east of original locality.
  • ORBITULITES (TINOPORUS) TEXANUS, Roem. 1, 1849
    ;2, , 1852
    . F. Between New Braunfels and Fredricksburg.
    This form composes the mass of a well defined chalk horizon south of the Brazos, as seen in the bluffs of the Colorado near the mouth of Bull Creek.
  • TEXTULARIA,sp. ind., Hill 3. A. Austin chalk.
  • GLOBIGERINA, sp. ind. , Hill 3. A.
• COELENTERATA. ANTHOZOA.
  
  • TROCHOCYATHUS (TURBINOLIA) TEXANUS, Con. 2, 144, 1 857
    . W. Between El Paso and Frontera.
  • CLADOPHYLLIA FURCIFERA, Roem. 4, 1888
    . H. Barton Creek, [two miles] west of Austin.
  • ISASTREA DISCOIDEA, White. Geol. Mag. 1888, p. 662. N. "Navarro beds." Have found what is probably this species in the shales at Eagle Ford.
  • COELOSMILIA AMERICANA, Roemer 4, 1888
    . H. Barton creek, west of Austin.
  • PARASMILIA AUSTINENSIS, Roemer 4, 1888
    . H. Barton creek, west of Austin.
  • PLEUROCORA COALESCENS, Roemer 4, 1888
    . H. Barton creek, west of Austin.
  • PLEUROCORA TEXANA, Roemer 4, 1888
    . H. Barton creek, west of Austin.
  • ASTROCOENIA GUADALUPAE, Roemer 1, 391, 1849
    ; 2, 187, 1852
    . V.? Hills north of New Braunfels.
• ECHINODERMATA.
  • OPHIODERMA, sp. nov., Hill 2, 1887
    . W. Fossil creek, six miles north of Fort Worth.