Key points are not available for this paper at this time.
persimilis from Yucatan. Occ. Papers Mus. Zool. Univ. Mich. 568. . 1972. Threatened freshwater fishes of the United States. Trans. Amer. Fish. Soc. 101: 239-252. PICKFORD, G. E., F. B. GRANT AND B. L. UMMINGER. 1969. Studies on the blood serum of the euryhaline cyprinodont fish, Fundulus heteroclitus, adapted to fresh or to salt water. Trans. Conn. Acad. Arts Sci. 43:25-70. REID, G. K. 1961. Ecology of inland waters and estuaries. Reinhold Publishing Corp. New York, N. Y. RELYEA, K. G. 1967. Systematic study of two species complexes of brackish water Fundulus (Pisces: Cyprinodontidae). Unpubl. Ph.D. Dissertation, Tulane University. ROOT, R. W. 1931. The respiratory function of the blood of marine fishes. Biol. Bull. 61: 427-456. SLICHER, A. M. 1961. Endocrinological and hematological studies in Fundulus heteroclitus (Linn.). Bull. Bingham Oceanogr. Coll. 17: 1-55. SMITH, C. G., W. M. LEWIS AND H. M. KAPLAN. 1952. A comparative morphologic and physiorsimil s from Yucatan. Occ. Papers Mus. logic study of fish blood. Prog. Fish-Cult. 14:169-172. SRIVASTAVA, A. K. 1968a. Studies on the hematology of certain freshwater teleosts. I. Erythrocytes. Anat. Anz. 123:233-249. . 1968b. Studies on the hematology of certain freshwater teleosts IV. Hemoglobin. Folia Haemat. Lpz. 90:411-418. SWARTS, W. P. 1969. Blood studies of some marine teleosts. Trans. Amer. Fish. Soc. 98: 328-330. TAGATZ, M. E., AND D. L. DUDLEY. 1961. Seasonal occurrence of marine fishes in four shore habitats near Beaufort, N. C. 1957-60. U.S.D.I. Fish Wildlife Spec. Sci. Rep. No. 390. WEED, A. C. 1921. Fishes from Southern Wisconsin. Copeia 99:69-72.
O. E. Greenwald (Thu,) studied this question.