200 EB Wilson— New genera of Pyenogoni 
scdetes al te ‘water were heated t 125° C., but invaria- 
bly exploded before wae decomposition was completed, and 
therefore 10 farther attempts | were made to use the alkali to 
ons me 
» Allthat is to effect the complete decomposition of 
chromic i Ne sentiag this method is that the substance be ex: 
ingly fine card, that the same be exposed with bromine toa 
temperaturef 180°C. from two to three ders The addition 
of near dogs pens anton the decomposition 
idedly 
Dacincd by the ignitioks of the 
may be brought into solution again by 
| acl eat m2 ue in a beaker. 
of Pennsylvania, Dec. 
Descriptions of two new genera. of Pyenogonida ; 
Witson. Brief Contributions to, Zoology 
certain genera (e. lene 
ulated to the hae us and 
ann by means of which le 
marillare tes Tiveitebeitll - 
250, Pi be 1874 (non Stimpson) 
