284; KIRCHENPAUER, ON A HYDROIU POLYPE. 



1. C. lacustris, Allm. 



C. ramulis brevibus^ alternis, Isevibus ; capitulis conoideis, 

 acuminatis ; tentaculis filiformibus; (fluviatilis). Branches 

 shorty alternate, smooth ; capitula conoid, acuminate ; ten- 

 tacles filiform ; (fluviatile) . 



2. C. albicola, n. sp. PL IX, figs. 1, 2, 3. 



C. ramulis alternis, annulatis; capitulis conoideis, trun- 

 catis ; tentaculis crassis, granulatis ; (submarina) . Branches 

 alternate, ringed ; capitula conoid, truncate ; tentacles thick, 

 granulate; (submarine). Hab. Mouth of the Elbe, on 

 buoys. 



