2o8 



BERTRAM G. SMITH. 





pattern by the fluted surface of the cloaca. This pattern re- 

 minds one of the fainter meshwork seen with the aid of a micro- 

 scope in the stalk of a simple spermatophore. 



By an increase in the number of spermatophores arranged in 

 a vertical series we obtain the extreme form of the serial type 

 shown in Fig. 4, which is made up of six simple spermatophores. 



4 5 



Figs. 3, 4 and 5. Compound spermatophores of Ambystoma punctatum. All 

 the figures are camera drawings, X 5- 



Fig. 3. Compound spermatophore consisting of two simple spermatophores, 

 one superimposed on the other. 



Fig. 4. Compound spermatophore of the vertical-serial type. 



Fig. s. Simplest case of the Y-shaped type. 



Somewhat rarely, compound spermatophores of the Y-shaped 

 type (Fig. 5) are found. These are apparently formed by the 

 deposition of one spermatophore on the side of the stalk of an- 

 other. In several cases noted, one arm of the Y-shaped stalk 

 was again compound, consisting of two or more spermatophores 

 in series. 



