58 DAVENPORT ACADEMY OF SCIENCES. 



Similar to Carchesiinn but with continuous muscle fibre. The 

 entire colony is highly contractile. 



'^Rhabdostyla S. K. 



Similar to Vorticella but attached by a short rigid stalk. Never 

 forming colonies. 



'^Pyxidiiivi S. K. 



Animals similar to Operadaria but solitary on short rigid stalks, 



"^Opercularia Stein. 



Forming colonies with a branched but rigid stalk. Animals 

 elongate-oval. Ciliary disc attached by one side and opening and 

 closing like a lid. A delicate collar-like membrane also protruded 

 when the disc is elevated. 



Families and Genera of Suctoria. 



* 



Podophryid.e. 



Spherical or elongate, with or without a stalk. Tentacles scat- 

 tered or in groups, capitate and suctorial or prehensile. 



Sphcerophrya C. & ly. 



Podophrya Ehr. 



ACINETID.E. 



With or without a lorica, stalked or unstalked. Tentacles 

 usually capitate and in groups or scattered. 



Achieia Ehr. 



Hallezia Sand. 



^Solc7iophrya C. & ly. 



Body oval, enclosed by a lorica and attached in a sessile manner. 

 Tentacles capitate, in groups. 



Dendrosomid^. 



Without a stalk or lorica. Tentacles capitate, in groups. 

 Trichoplnya C. & L,. 

 ^Dendrosoma Ehr. 



Animals united, forming a branched colony with a common 

 base. Tentacles suctorial, capitate. 



Note.— In the above table of classification only families, representatives of which 

 have been observed in this state, are included. Species of genera marked with the aster- 

 isk (*) have not, so far, been observed in the state. 



