1104 General Notes. : [Dec. 
several subjects, it should give each student a thorough drill in 
some one branch. The scheme has been thoroughly worked out 
on paper, but time alone can tell how it results. It must be said, 
however, that it has amply satisfied its advocates during the two 
years that it has been tried. 
Hepaticæ Americanæ.—The first twenty numbers (Decades 
I. and II.) of this distribution, by Dr. L. F. Underwood and 
O. F. Cook, were received in the latter part of November. The 
species represented are as follows, viz.: 1. Riccia. natans L.; 
2. Marchantia polymorpha L.; 3. Conocephalus conicus (L.) Dum.; 
4. Anthoceros levis L.; 5. Blasia pusilla L.; 6. Steetsia lyelli 
Lehm.; 7. Frullania grayana Mont.; 8. Lejeunia serpyllifolia 
Lib., var. Americana Lindb.; 9. Madotheca porella (Dicks.) Nees.; 
10. Radula complanata (L.) Dum.; 11. Ptilidium ciliare (L.) 
Nees.; 12. Bazzania trilobata (L.) B. Gr.; 13. Trichocolea tomen- 
tella (Ehr.) Dum.; 14. Lepidozia reptans (L.) Dum.; 15. Kania 
17. Cephalozia curvifolia (Dicks.) Dum.; 18. Fungermania 
schradert Mart.; 19. Scapania nemorosa (L.) Dum.; 20. Plagw- 
chila porellioides Lindenb. 
GENERAL NOTES. 
GEOLOGY AND PALZ ONTOLOGY. 
The Sonora Earthquake of May 3, 188'7.—On the eT 
of May 3, 1887, at 2.12 Pacific time (=120° W. of Oe an a 
the first of a series of earthquake movements was felt in the te 
of Sonora and the adjacent parts of Mexico and the United ane e 
over an area extending from El Paso in Texas on the east re oak: 7 
river Colorado and the Gulf of California on the west, an : < à 
- the State of Sinaloa on the south as far north as Albuquerg™ 2 
in New Mexico; the extremes in both directions being OVer 5 
hundred miles. It was the fortune of the writers to be at a 
time at the great copper-mining camp of Bisbee in Arne p 
a narrow gorge of the Mule Pass Mountains, about rder of 
sand three hundred feet above the sea, and near the bo 
Sonora. A violent tremor of the earth, including ir 
shocks, and lasting over ninety seconds, was succ 
