1090 SÉANCÉ DU 98 NOVEMBRE 192% 
1900. Crrve (P.:T.) : The seasonal distribution of Atlantic Plankton 
FF organisms. Güteborg. | 
1922. Fonri (A.) : Ricerche su la flora pelagica (fitoplancton) di Quarto 
dei Mille (Mare Ligure). Venezia. ; 
1864. Lauper (H. S.): On new Diatomns. Family Chætoceras : genus 
Bacteriastrum (Trans. micr. Soc. London, XII, London). 
1915. Meunier (A.): Microplankton de la mer flamande, 2€ partie, 
Bruxelles. | . 
1911. Oramura (K.) : Some litioral Diatoms 0f Japan (Report Inip. 
Fish. Inst. VII, Tokyo). 
1901. Osrenrerp {C. H.): Tagitagelser over Plankton-Diatomeer (Nvyt. 
Mag. f. Naturvid. XXXIX. Kristiania). 
1902. = Marine Plankion Diatoms, in J. Senmior : Flora 0f Koh Chang 
(Bot. Tidsskr., XXV, Copenhague). à 
1916. Pavizcarn (J.\: Recherches sur les Diatomées pélagiques du Golfe 
du Lion. Cette (Station zoologique). | 
1908. Péragarro (H. et M.) : Diatomées marines de France et des 
districts maritimes voisins. Grez-sur-Loing. 
1861. PriscHarn (A): A listory of Infusoria. London. ; 
1854. Smapsorpr (G.) : A short description of some new forms of Diato- 
maceæ from Port Natal (Trans. micr. Soc., IT, London). 
1906. Scnrôper (Br.) : Beiträge zur Kennitnis des Phytoplanktons warmer 
". Meere (Vierteliahrschr. d. naturf. Ges. in Zürich. Jahrg. 51, 
Zurich). 
1860. Wazricr {G.:C.) : On the siliceous organisms found in the digestive 
cavities of the Salpæ... (Trans. micr. Soc., VIII, London). 

Un Urelyirum nouveau de Madagascar 
PAR AIMÉE CAMUS 
Urelytram madagascariense A. Camus, nov. Sp. 
Perenne. Culmi 4 m. alti, robusti, teretes, glaberrimi, simplices, 8 no- 
des, superne nudi. Laminæ e bas subæquilata lineares, planæ, 30-40 em 
longæ, 6-7 mm. latæ, glabræ, utrinque scabræ, margine scaberrimæ, 
nervis lateralibus prominulis. Ligulæ membranaceæ, rotundatæ, pilo- 
sulæ, sed pilis 8-12 mm. longis stipatæ. Vaginæ teretes, arctæ, glaber- 
rimæ, striatæ. Pedunculi 1-3 cm. longi, sericei. Racemi 2, contigui, 
erecti, 15-20 em. longi, pruinosi. Rachilla glabra : articuli 5 mm. lonof, 
appendice inæqualiter bidentato ciliato. Pedicelli articulis arcte accum- 
bentes, liberi, 5 mm. longi. Spiculæ sessiles cum callo obconico acu- 
tiusculo 1,5-2 mm. longo albo-barbato 8-10 mm, longæ, 2 floræ : olu- 
ma Îme cartilaginea, oblonoo-lanceolata, subacuta, dorso planiuseula, 
marginibus angustissime inflexa, flexuris setuloso-muriculatis ; [Ida 
quam [ma baulo brevicr, 6-7 mm. longa, navicularis, carinata, carina 
setuloso-ciliata ; II[a quam ma paulo brevior, 6-7 mm. longa, ovato- 
lanceolata, hyalina, ciliata ;-palea 6 mm. longa, hyalina, ovato-lanceo: 
QE | 
É R T Ce 
