$4.60 per Year (Foreign). 
THE 
AMERICAN 
NATURALIST 
A MONTHLY JOURNAL 
DEVOTED TO THE NATURAL SCIENCES 
IN THEIR WIDEST SENSE. 
NAGING EDITORS 
Pror. E: D, COPE, Philadelphia, Pa., and Dr, F. C. KENY ON, Washington, D. ©, 
poteo ARAO NRA 
A C M) WEED, Durham, NH, Da. e. E. BESSEY, Lincoln, Neb SCY : Philadelphia. H 
or. A. C. sake » Tm haca W. re BAYLEY, ii Maine P. É. J DREWS, Baltimore. 
a a c. WARREN, boas: ERWIN F. ar oy AREAS D. C; 
Vol. XXXI. ” APRIL, 1897. 
CONTENTS. 
PAG 
Tue Score anp PRESENT POSITION. OF BIOCHEM- R S hoe and Polybasite—Niscellareous 
ISTRY. Albert Mathews 271 
Tue PÓLYPHYLETIC DISPOSITION OF Lick ae e P EAT EE Fossil Mi 
Frederick Clemionts. 277 | erococci—Geology of _ Luang nies The 
Fosstis AND FOSSILIZATION, ( aueranr ok Position of the Chico-Tejon Beds— The e posit- 
_ P. Gratacap. 285 | ion of the Periptychidai- Alasa Bea 
Some P ANTTOPA davai WITH DESCRIPTION Michigan—Lake Joe SAIRE Preistorie Dog 
o E NEw SPECIES. ae S.: Ross. 298 Rowan Nev 
: eon hin SEA- NOES ` E. Verrill. 304 Eois aera hole Species of of F jogi from Various ; 
DITORS TAB i Hote ries—— 
eatio i Rl ec Taxat Science- = Zoology — Param œba e eilhardii—Diplodal 
W ashineton AY point A : - 30g | Sponge-Chambers— —The Asymetry of Sse er 
RECENT LITERATU soa Sudwo oth’ "g No Ee “i Ag: and the Ph yiogenins Relationships gi * a 
ure of the Aborescent Flora of the United ine permanant a ata on ye 
States—Atlas und Grundriss der Bakterio- Limulus—Elassoma zonatum East of the App. 
ne May Lehrbuch der dy x sary Daat lachian M untains— l TA 
iologischen Diagnostik—Science Sketches on 
í Entomology—The Fauna of the Lanei 
acute logy =e Reeg. R TEE n 310 | Grande Va illey—Life-history of Xylina—N 
Recent Bo 394 | 0n Dragon-flies— —Changes of Intestinal Fpith 
6 OKS AND Pawruiets. ale tt  « 8241 dm in Tenebrio | 
Tolna Physiolagy -Dreams Courtship of Grassh 
Petrography — “Tt alian Petrography—The 326 } pers 
= eA hese in the Ruhr V ‘alley Tka est- Anshr opoleg y — Recent Pile Struetures made hy 
alla Eclogite of the Fichtelgebirge— g I ‘dians im East Fi A 
Nodular Granite from Finland—Volcanic As sh Sg oti raha s in South Americas + seller: 
Diabase pih ` Bagh aE ASP aap er ane 396 Microscopy—A Method of Preparing Rotifers. 
Mi ilay — The $ Bis teation a of Pre PROCEEDINGS OF SCIENTIFIC SOCIETIES. «4 45 9% 
Stones i in 1395—The aoine Matter of Minar oie NEWS. he oe ee 
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