ATURALI 
A MONTHLY JOURNAL 
DEVOTED TO THE NATURAL SCIENCES 
IN THEIR WIDEST SENSE. 
MANAGING EDITORS: 
Prors. E. D. COPE, aa ONE, AnD J. S. KINGSLEY, Boston. 
ASSOCIATE EDITORS: 
ma. C. O. WHITMAN, Chicag Dr. C Neb = a negra teen Washington, 
D, aar. N H., ý - BAYLEY, W : E A. ANDREWS, 
_ LOCKINGTON, Rugby, ane ary 
MARCH, 1893. _ No. 815 
CONTENTS: 
PAGE. P 
Mineralogy and Pelrography-—The- Rocks of. 
| Lawton Williams. 193 | the Thathorn- The New Je nate bog aay Seike Mies 
NOTHERIUM. BEDS. “(Clstrated.) eres from Kenti fe vs 
atcher, 204 d Penn—The Nepheline and Tepe o! 
DUCED- SEXUA ALLY WITHOUT Brazi — Petrographical Ne ews — Crys aa a 
R IONS OF THE MOTHER.  {(Ilus- opsides—Herderite Ange n Hebron, Maine 
. Boveri. 222 Notes—New i 
CEASSIFICATION OF THE LONGIPENNES. 
Shufeldt: 233 
The Se sg Survey of Mlinois— 
n Ortho SA _Tutersiional Botanical Ga 
ical Society. -238 Erna Not : 
Zoology. pE a s Faunal Areasof North America— 
Memoirs of the ‘National en Madagascar Fauna—The Nephridia of A 
o ise — Brooks and s—The Position pr the Marsipobranchs—] 
ogy Macrura— SETAA of the Human sce T oe — New 
Biology Correlation rien of the | —Repti 
Ses as oe e 
soe eas on the 
si , 243 | Composition. 
Entomology. —The Pear-Three Psylla. 
and Travels — Africa — Ametica— 
‘Sia—Europe—The oe caer 
gress o on taat he ists. 
PROCEEDINGS OF SCIENTIFIC Socreriés, 
Saextierc News. 
I PuLcADELPSra, U.S. A. 
