I'rof. lleiitVcy on the CeU-cuntt'iits 0/ Clostcriuiii. 411) 



vermifofiiiis, vcstc meiiibranacca tubulari induta. Extreinitas 



iulcrior pcitorata. Tt-utacula ])lurinia, in duabus serii-bus di- 



gcsta, cxtcriora lonj^a, iiiteriora brcvia. 



40. C membra naccus (Ginclin). Semi-pedalis. Tciitacula mar- 

 ginalia omnium longissima : annulata. 



-U. C. (?) ir/7«/cM/ffm (Forbes). Semi-pollicaris. Cyclus tcn- 

 taculorum mcdiocrium extra longissima. (Vestis non relata 

 est.) {Ifanr non vidi.) 



Fam. V. Lucernariadse. 



Basis adlucreus. Corpus cratcriforme. Tcntacula capitata, 

 in octo fascicules segregata. Discus octangularis. 



Gen. XV. Depastrum (Gosse). Corpus repente contractunij 

 et supra et infra alvum. Tentaculorum fasciculi uiter angulos 

 disci ])Ositi, vix scparati. 



42. D. cyathiforme (Sars). SemipoUicare. Brunneum. 



Gen. xvi. Lucernaria (Miiller). Corpus expansum supra, 

 gradatim diminutum infra. Tentaculorum fasciculi in apicibus 

 angulorum positi, remoti. 



43. L. camponidata (Lamx.). Corpus campaniformc, profundum. 

 Petiolus brevis. Colore hepatico. 



44. L. auricula (Fabr.). Corpus expansum, umbelliforme, mi- 

 nime profundum. Petiolus instar corporis longitudine. Disci 

 anguli jequidistantes. Intcranguli (uoununquam) sphrerulis 

 marginalibus instructi. Viridis vel rosea. 



45. L. quadricornis (Miiller). Corpus expansum, fere planum. 

 Petiolus cjrpore multo longior. Disci anguli in paria conglu- 

 tinati. Liirni-brunnea. 



Has species pr;ecedentes, figuris illuminatis ad naturam de- 

 pictis, in opere meo, ' Actinologia Britannica,' quod nunc in 

 fasciculis bimestribus publicatur, illustrare propositum e.st. 



XLI. — Note on the Cell-contents cy Closterium. 

 By Arthur Hexfrey, F.R.S. &c. 



The remarkable movements occurring in the interior of the cell 

 constituting the individual plant in the genus Clostermm have 

 attracted the attention of most physiologists, and have u:iven 

 rise to much discussion. Not very long ago, it was re-asserted 

 that the movements were associated with the presence of cilia*; 



* Quarterly Jounml of Micioscoi)ic Scieuce, iii. p. 54, 1855. 



'27* 



