81 
site analogue chez un Mollusque. II dit “ qu’il existe dans 
la riche collection de M. le Prince d’Essling, une Clauselie dont 
la coquihe est terminee en avant par deux ouvertures arron- 
dies et presque de forme normale. Malheureusement le desir 
de eonserver intacte une aussi rare coqnille, a fait negliger le 
corps de 1-animal, qui a etc detruit sans avoir ete examine. 
Aussi, est-il impossible de rapporter cette Clausilie mons- 
trueuse a son veritable genre teratologique, et meme avec 
certitude, a sa veritable famille ; car rien ne prouve qu’elle 
doive appartenir ala famille des Monosomiens plutot qu’a celle 
des Sysomiens, (monstres a corps confondus.”) 
De Le Jege. 
La seance est terminee par 1’extrait suivant du British 
Medical Journal , reproduit dans le journal Nature et connnu- 
que a la Societe : 
“ M- Lindeman continues his investigation of the parasitic 
bodies (Gregarinidae) found on the false tresses and chignons 
commonly worn by ladies. They are to be found at the ex- 
tremity of the hairs, and form there little nodosities, visible, 
on careful examination to the naked eye. Each of these 
nodosities represents a colony of about fifty psorosperms. 
Each psorosperm is sphasrical; but, by the reciprocal pressure 
of its neighbours, it is flattened, and becomes discord . Under N- c -J -c 
the influence of heat and moisture, its swells ; its granular 
contents are transformed into little spheres, and then into 
pseudo-navicellae — little fastform corpuscles, with a persistent 
external membrane, and enclosing one on two nuclei. These 
pseudo-navicellae become free, float in the air, penetrate into 
the interior of the humain organism, reach the circulatory ap- 
paratus, and produce according to this author, various mala- 
dies : — • “ Cardiac affections, especially valvular affections, 
E rights’ disease, pulmonary affections. ” 
“ Mr. Lindeman calculates that, in a ball room containing 
fifty ladies, forty-five millions of navicellae are set free ; and 
he concludes that it is necessary to abolish false hair, which 
often proceeds from unclean persons. 
( Nature , September 5th 1872.) 
