83 

 LITERATURE. 

 1862. Af^assiz, Louis. Cort^ibutiors to the I'atural Hintory 



of U. S. A. Part IV. Hydrcldae. 

 1865, Apassin, A. r orth Americrr Acaler^hae. Catalrf^ue of 

 the yus. CoTTD. Zocl. Part II. 

 1900. Allen, C. ;v:. The Develon-^e-'t of Tubularia ''rocpa. Bid. 



Bull. Vol. I. 

 1872. All:^an, J. G. A 'ionopranh of the Gymnoblastic Tubularian 



Hydriods. Ray Society .Lerdon. 

 1898, Andrev.'S, E. A. Sone ectosarcal r.her.oner.a in the egp of 



Hydra. Joh"3 Ho-kins Univ. Cir-. XVIII. -- / 

 ISSl. 5rauer, A. Uber die Entwickelunp vc- Hydia. Zeitschr. 



Wiss. Zool. LII. 

 1891. Erauer, A. Uber di? Entstehu-ir^ der Geschlochti^-nrodukte 



und die Entwickelunr-^ von Tubularia ness'-ibranthe'^m. Id. 

 1833. Brooks, 'A. K. liotes on the >dusae of Beaufort, K. C. 



Studies frcT the Biol. Lab. Johns Hopkins U-^iv. Vol. II. 

 1884. Brooks, '.'•. K. Life-History of Euti~a and Radial a^d Bi- 

 lateral Sy--Ptry i^i Hydroidn. Zool. AnzeiPor. Vol. VII. 



