314 Scientific Intelligence. 
scopic hexagonal crystals (pyramids with the prism, the latter 
sometimes 3-sided) on chromite from California, specimens of 
which he received from Mr. John C. Trautwine. Chemical and 
blowpipe examination ee ed that it contained oxides of chro- 
mium, iron and magnesium. Heated to redness in the closed een 
tube, it gave a little water and ane bluish green. Not dis 
solved in acids, 
16. Mineralogische Notizen, von Frirprertcn J1EssENBERG, 
No. 11. (From vol, vili, of the ’Abh: andlungen of the Senckenberg 
ae otiden ence of Scacciencepioians 
The Sexes of Spherom: ; by Oscar Harcer.—In a recent 
a 
Annales des Sciences Naturelles, 5° série, tome xvii, 1872-3, M. 
esse has, with considerable hesitation, advanced the opinion 
that Spehroma i is only the female of Cymodocea, and that 
Dynamene is the female of Nesea, The hesitation of this author 
rests upon the fact, that the evidence in his possession was 
unsatisfactory and negative in character; and he laments his ill 
success in raising the young of these ra sae significantly remark- 
ing “ the offspring of Sphwroma, which he raised as far as the third 
mou rsque ces Crustacés sont parvenus & ce degré de trans- 
febtiation, ils ont la forme eur mére, c'est-d-dire celle des 
is expressed. ‘and the absence, so far as sdenaitens of the former genus 
from this i not be considered as conclusive against 
the proposition. Neither has Cimodoce een obtained so 
far as I know on our coast, but pheroma quadridentata Say 18 
may be easily found. The sexes are bap onc distinguished by the 
second pair af leopoda which, the males, are furnished 
movable processes. In the females the plates, which during the 
breeding season are developed for the purpose of carrying egg, 
resemble each ditiets and both belong to the genus Sphierom 
18. Key to North American Bir j oncise wccount 
of every species of Living and Fouutk Bind, at pe Sees re known from 
the Continent north of the Mexican and United States Boundary 5 
by Dr. Ettiorr Coves, U. 8. A. Large 8vo, 361 pages, with 6 
steel plates and over 250 wood-cuts, Natural list’s Agency, Salem, _ 
Mass.—This is an excellent manual of North American ornithol- 
ogy, suitable for beginners in the science, and useful and con 
