Henn: South American Poeciliid Fishes. 107 



G. Boiilenger (1912, p. 906), who has reared this species, likewise 

 notes the equality of sexes in very small broods; a fact, however, which 

 in the prevailing idea of the numerical inequality of the sexes he 

 considers remarkable. 



References to the Literature. 

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American Journal of Science and Arts, (2), Vol. XVI, 1853, p. 134-136. 

 Ballowitz, Emil. Die Doppelspermatozoen der Dystisciden. Zeitschr. Wiss. 



Zool., Vol. LX, 1895, pp. 458-499. 

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nils pceciloides). Proc. Zool. Soc. London, 1912, pp. 906-908. 

 EiGENMANN, C. H. The Poeciliid Fishes of Rio Grande do Sul and the La Plata 



Basin. Proc. U. S. Nat. Museum, Vol. XXXH, 1907, pp. 425-433. 

 Garman, S. (a) Sexual rights and lefts. Am. Nat., Vol. XXIX, 1895, pp. 1012- 



1014. 

 {b) The Cyprinodonts. Mem. Mus. Comp. Zool., Vol. XIX, No. i, 1895, 



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 (c) Cross fertilization and sexual rights and lefts among vertebrates. Am. 



Nat., Vol. XXX, 1896, p. 232. 

 Gill, T. N. The nomenclature of the Family Poeciliidae, or Cyprinodontidae. 



Proc. U. S. Nat. Museum, Vol. XVII, 1894, pp. 115-116. 

 Philippi, Erich, (a) Kurzer Beitrag ,^ur Kenntnis der Teleostier-genera Glari- 



dichthys Garman und Cnesterodon Garman. Sitzber. Gesell. Naturf. 



Freunde, Berlin, Jg., 1906, pp. 229-232. 



(b) Ein neuer descendztheoretisch interessanter Fall von Viviparitat bei 



einem Teleostier. Ibid., Jg. 1906, pp. 235-237. 



(c) " Spermatophoren " bei Fischen. Verb. Deutsch. Zool. Ges., Leipzig, 



Vol. XVII, 1907, pp. 105-108. 



(d) Fortpflanzungsgeschichte der viviparen Teleostier Glaridichlhys januarius 



und G. decem-maculatus in ihrem Einfiusz auf Lebensweise, makroskop- 

 ische und mikroskopische Anatomic. Zool. Jahrb., Vol. XXVII, 1908, 

 pp. 1-94, 7 plates. 

 Regan, C. T. (a) The Osteology and Classification of the Teleostean Fishes of 

 the Order Microcyprini. Ann. Mag. Nat. Hist., (8), Vol. VII, 19x1, 

 PP- 320-327. 



(b) Phalloslethus dunckeri, a remarkable new cyprinodont fish from Johore. 



Ibid., Vol. XII, 1913, pp. 548-555- 



(c) A revision of the cyprinodont fishes of the subfamily Pceciliinae. Proc. 



Zool. Soc. London, 1913, pp. 977-1018, 3 plates. 

 Ryder, John A. On the development of viviparous osseous fishes. Proc. U. S. 



Nat. Mus., Vol. VIII (1885), 1886, pp. 128-156, 6 plates. 

 Seal, Wm. P. "Breeding Habits of the Viviparous fishes Gambusia holbrookii 



and Helerandria formosa." Proc. Biol. Soc. Washington, Vol. XXIV, 



191 1, pp. 91-96, plate I. 

 ZOLOTNISKY, N. "Les moeurs du Girardinits decem-mactdatus, Poisson vivipare.'' 



Arch. Zool. Exper., (3), Vol. IX, 1901, pp. Ixv-lxxi. 



