SPERM ATOPHORES OF AMBYSTOMA PUNCTATUM. 211 



the structure of the spermatophores recorded in the present 

 paper, we can go further and say that the entire process of secur- 

 ing fertiHzation by means of spermatophores is in Amhy stoma 

 punctatum more primitive, less highly adapted to secure its ob- 

 ject with economy of material, than in Diemyctylus viridescens. 



Zoological Laboratory, 



University of Wisconsin, 

 Madison, Wis. 



LITERATURE. 

 Gasco, F, 



'81 Les Amours des Axolotls. Zool. Anz., 4. 

 Jordan, Edwin O. 



'93 The Habits and Development of the Newt (Diemyctylus viridescens). 

 Journ. Morphol., Vol. VIIL, No. 2. 



Smith, Bertram G. 



'07 The Breeding Habits of Ambystoma punctatum Linn. Am. Nat., Vol. XLI., 

 No. 486. (Includes a more extensive bibliography of earlier literature.) 

 van Leeuwen, W. Docters 



'07 Ueber die Aufnahme der Spermatophoren bei Salamandra maculosa Laur. 

 Zool. Anz., 31, pp. 649-653. 



"Wright, Albert Hazen 



'08 Notes on the Breeding Habits of Ambystoma punctatum. Biol. Bull., Vol. 

 XIV., No. 4- 

 Wright, Albert H., and Allen, Arthur A. 



'09 The Early Breeding Habits of Ambystoma punctatum. Am. Nat., Vol. 

 XLIIL, No. 513- 

 Zeller, E. v. 



'05 Untersuchungen iiber die Samentrager und die Kloakenwulst der Tritonen, 

 Zeitschr. wiss. Zool., Bd. 79. 



