6 
CURTIS S. 
AM 
IN A TRIPLY CONNECTED REGION. 
The methods employed in this classification are believed to be entirely new, though 
on * of hyper- 
forming a natural development of Riemann's work 
geometric families without apparently singular points, whicli 
Ritter's classificat 
Part 1 r, D, we g 
a corollary of our more general results, and which he obtained by a method totally 
different from ours, also furnished valuable suggestions. The case he treated is 
the 
most general for which such 
classification has hitherto been attempted 
Math. Ann., vol. 48. 
Nebenpunkt. (1896) 
