38 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



ORDER CHOANOFLAGELLATA. 



Key to Genera. 



1. Solitary 2 



Colonial 3 



2. No lorica Monosiga^ 



With lorica Salpingaca* 



3. Individuals inclosed in an irregular jelly. . .Profospongta 

 Colonies rotund, or arising in a mass from a funnel- 

 like, open jelly tube Phalansterium 



Colonies free, of several individuals in an irregular 

 row Hermidium 



Many individuals on the end of a simple stalk 



Codonosiga* 



With branched stalk, and single individuals or groups 

 on end of each branch CodouocJaditim* 



Description of Genera. 



Monosiga S. K. 



Solitary. Attached either directly or by means of a 

 short stalk. Collar expanding in iront and changeable in 

 form. 

 M. ovata Kent, Fig. 106. 

 Salpingoeca J. CI. 



Solitary individual in a lorica which assumes a variety 

 of shapes ; generally cup-shaped. 

 5". Steinii S. K., Fig. 92. 

 Codonosiga J. CI. 



Similar to Monosiga, but forming colonies upon the 

 end of a simple, rather long stalk. Twenty or more in- 

 dividuals unite, forming a spherical group. 

 C. bo try t is Clark, Fig. 107. 

 Codonocladium Stein. 



Body spherical to ovate. The long stalk forming 

 colonies with single individuals on each stalk. 

 Co. iDnbellatuui Tat., Fig. 102. 



