KIRCHENPAUER, ON A HYDROID POLYPE. 283 



Stephanosplieera (Colin) ^ and serve to establish another link 

 between them. 



It would be very interesting to extend observations beyond 

 the point I have carried mine, and those interested in these 

 researches would do well to secure as many Volvox as possible 

 this autumn. 



Thus^ there seem to be two modes by which the life of 

 Volvox (which ceases as such on the approach of winter) can 

 be perpetuated, namely — 1^ by the encysted cell [winterspore, 

 hypnospore), which Cohu conceives to be of the nature of an 

 oospore (impregnated gymnospore) ; 2, by the above-described 

 form of motionless segments of the zoospore^ which clearly 

 has its homologue in many algae, and for which, perhaps, a 

 more appropriate name may be found in " stato-spore," not 

 sleeping, but free from motion, because without ciliae, and 

 thereby distinguished from zoospore. 



There is also a striking analogy between these and the 

 segmenting gonidia of lichens, especially of Cladonia. 



On a new Hydroid Polype belonging to the Genus Cordy- 

 LOPHORA, Allm., discovered by Senator Kirchenpauer, 

 of Ritzebiittel. By George Busk, Esq., F.R.S. 



In a letter recently received from Senator Kirchenpauer, 

 to whom we are already under great obligations of the 

 same kind, he encloses specimens and drawings, together 

 with the description, of a Hydroid Polype, " which,'' he says, 

 " seems to be new. It belongs to Professor Allman's genus 

 Cordylophora, and as it differs from C. lacustris, Allm., the 

 only species that has been published, I have named it 

 C. albicola. I found it three years ago, and since then every 

 summer again, on some of the buoys moored in the mouth of 

 the Elbe. Description and drawings were sent to the Ham- 

 burg Naturwissenschaftliche Verein." 



Fam. Tubulariad^. Gen. Cordylophora, Allm. 



(Polyparium corneum,tubulosum,fibris tubulosis reptantibus 

 affixum, erectum. Polyporum capitula in apice ramulorum, 

 conoidea, tentaculis sparsis nee capitatis munita.) 



