TRANSACTIONS OF THE SECTIONS. 
105 
dole leal' terminates in a single leaflet, which consequently forms the apex of the 
of The leaflets in the oldest plant which I have seen arc twenty-seven in number; 
•' ik young plant or seedling they are four. Instead of the bright glossy green 
d other ('reads, the leaf of Stangeriu is pale green and does not shine. The form 
leaflets is oblong-lanceolate and acuminate. 
Tw following account of the male cone is taken from a plant now (September 
•-itin flower at Kew: it bears two cones, each growing upright on n short thick 
^.. Scales not peltate; the external MUftott (MUO-glV rn, /.cage- 
c one is pointed at the apex, between 1 and 5 centimetres long, and 
m being very much smaller, bears a close analogy to the cone of the genus 
he nut, or seed, ig nearly orbicular, and 1-5 centimetre in diameter. 
‘ iiliHrate this communication, Mr. J. Yates exhibited a drawing of Stang<ria 
recent specimens of different parts of the plant ; a mule cone of Dioon 
jja' a hving specimen of a Lomaria. For previous descriptions lie referred to 
' 0Brna *°J Botany, Aug. 1853, and Scemanu, Bouplamlia, Feb. 1851, p. 44. 
Zoology. 
Occurrence in the Infusoria of peculiar Organs resembling Thread- 
[ Dan jm Celts. By Professor ALLMAN, F.R.S. 
mttgipg ttoilogtaph by Cohn on the PanniKCciuin Bumarin. tins author 
-■ * reality m v j la which the whole surface of the animalcule is covered 
in the living animal would lead 
' cp ! on the trU v opinion on the fact, that when the animal is allowed 
he believe tn!° lt * 9 seen * u bristle w *th long rigid filaments, 
. ^ | i‘.»ridin nccor 0 | e t “ e . ci *' ci ^ en for the first time become visible in their entire 
^totiger than ,,.u U . Ce , Wlt *' this view, he figures tile animal covered with cilia very 
. > n in his remark ki mBre inspection of the living Paramtpcium would justify. 
; ;[' n of Cohn who h 0rIc 0tl development of the Infusoria, refers to this 
rfl'-like processed ■'r* however, he believes to be in error in supposing the long 
‘he living u° • dead animalcule to represent the natural length of the 
lengthen J u1n ‘ ntR ' us > n n the contrary, that these processes are the cilia 
\ * '^sarnenhiem, Un< “ r , cxter «al influence's, and he states that he has wit- 
in(lu Ce it bv a We,i0n 111 many other infusoria, in which lie has always been 
^ theni 8L ,iv e L ,l C n PPhcation of strong noetic acid, when the cilia suddenly 
£ llic recently en „ a J^ e nr loui ' times their original length. 
Vq aa *f ,r * a fcuett, Khr a m PXamin .' n 8 the structure of a nearly allied animalcule, 
la great p'rofuRin *.® rcen variety of which was developed during the present 
»*- , Rn ^Pearanee !!* a . sn ! n ^ P°ud in the county of Kssex, Dr. Allman wit- 
•' r ?' ne clear to bii ?h y 8,rni,nr to that described bv Cohn and Stein, hut it 
is now satisfi “ lc dermat» naturalists had erred in their explanation 
the filaments in question have nothing whatever 
T,b ?n jjjwia. peculiar and very remarkable organs hitherto undescribed 
Vu,fi ybe betcct^! U tpf r ‘ UI1( h' r a sufficiently high power, minute fusiform 
ftybvT.? 1 '* transnarp,., '*>' lru hedded in its walls’ These bodies are perfectly 
Nrt^J.^tnesaed atU.e Wf 7 a, ° a ! ,out thc r*rro th of nn inch long. They 
jSvjrrtL™* °atlinc of 5, e ,na . r f? ln * "where they are seen to be arranged perpen- 
w wj tx,r etafetmnen ° an,raa lcule, hut on the surface turned towards the 
s ^it Pf, n . c beneath *h. arenc 7 un ‘l want of colour renders it necessary to crush 
>* l "' ll .r Dm 08 * '"“tetobiEKI 11 ' ' P ■" onl the I'ules 
W L ,{!° ie8 *<> give tl.o * K ’ fu * lform bodies into view. To these bodies 
!L C Se k he an 'malcul “ e of tri ^»U. 
•’°f tire w hen subiootl?'— ^ rce ,r ? m ann oyance, the trichocysts undergo 
bounding water to ^ xterna | irritation, as occurs during thc drying 
» or the application of acetic acid, or other chemical 
