THE 
AMERICAN 
NATURALIS 
A MONTHLY JOURNAL 
DEVOTED TO THE NATURAL SCIENCES 
IN THEIR WIDEST SENSE. 
MANAGING EDITO 
Prors, E. D. COPE, PEERAA AND J. " ENGEL EY, Boston. 
ASSOCIATE peie 
Dr. C. O. WHITMAN, Chicago, EE be BESSEY, Lincoln, Neb., H. C. MERCER, Philadelphia, — ' 
PRor. C. M. WEED, Durham, N. H., n. or, W. S. BAYLEY, W nos. Maine, Pror, E. A. ANDREWS, Baltimore, 
PROF. * H. HOBBS, Madison, Wis. 
m XXVIII. JULY, 1894. No. 331. 
CONTESTS. 
PAGE, PAGE. 
ANIMAL MECHANICS, Dr. Manly Miles: . 555 | New Island off Pantelleris —A . Correction— 
THE MEANING OF TR&E-LirFE. Henry L. Clarke, 572 | Petrographical Provinces—Miscellaneous. '. . 60; 
LEPIDOSIRENIDS AND BDELLOSTOMIDs. Botany —Thaxter’s Studies of the Laboul- 
Theodore Gill, 581 | beniaces. . . s; 
THE ORIGIN or PELAGIC LIFE, Zoology — The y EPERE Sense randi 
From Professor W. K. M 585 | Insects—The Luminous Organs of HAE 
RECENT BOOKS AND PAMPHLETS. |.. . 589 | this rueppelii Verany—Verril's Organ—Pre- 
KECENT LITERATURE, —Gage's TERRE end liminary Descriptions of Some New South 
Microscopical Methods —Shufeldt on Chap- American Characinidee —On the Species of 
‘man’s Birds of Trinidad — Annual Report Himantodes D. & B—Zoological News. 
Minnesota Natural History Survey for 1892. . 592 |  £""/eme/egy—The Pear Leaf Blister, D : 
Psi. Norns. trated) — Termite octets =: Habits of. the 
i Pasco of Southern Geena on 
Geology and Paleontology,—Schlosser on Amer- the Win 
ican Eocene Vertebrata in Switzerland—The piles Antenuation of Viper puse. 
| Skull oa Pisodus Medic oma pd The Secretion of Ure : 
Cenoz . 994 Archeology and Etro gy olo pipes iie in 
Mi ES ui ibutions to Swedish Miner | Shell-heaps of the St. John’s—Norse Remains 
^ ema art I—Optical Methods—Isotypism— | in the Neighborhood of Boston mA x 
basilar Structure in Quartz Crystals. . . . 597 | of field work in the Department of Am 
Petrography—Contact Effects around Saxon and virion Archeeology of the University 
` Granites—The Schists of the Malvern Hills— of Pennsylvani 
A Soda-Rh yolite from the Berkeley Hills, Cal. PROCEEDINGS OF dine Socrernik coy 2c NN 
—Diabases from Rio Janeiro, Brazil — The SCIENTIFIC NEWS. 4. i... v 09.59. 20 CENE 
THE EDWARDS & DOCKER COS 
need ai SON, 
| 28, Essex STREET, STRAND, LONDON. ENGLAND. 
