

1891.] ii n ONMMTS: i iii 
CONTENTS. 
PAGE. 
On Excavations Made by Sea-Urchins. J. WALTER FEWKES ......- z 
Instances of the Effects of Musical Sounds on kabiak- Rogert E. C. 
RUNG a a E as ee re me eee 22, 123, 236 
The History of Garden Trone ~ L. Proma a a Oy LaS 313, 719 
Remarks on the Brain of the Seals. E. C. Sprrzka........-+.. 
— of the Pr ae = a LL Seba erai PEPEE for the Year 
Calon B REYES o a eA eh ee een E S 31 
Autotomy in the nye 4 uk ) E. A. Arpkiw o oo +s. 138 
On Certain shui! a in the Flora of the phar EA Islands. J. 
W è PONE Oe ee aa a a ea a a e ee 215 
The Teeth as Saints of Evolution. W.C. CANHA. 2 2% «ss - ee 224 
Genesis 5 the Actinocrinidæ. (Zllustrated.) EFS mus B. Keyes. 2... 
On the T san Character of the St. Louis reas (Titustrated. ) 
2H. 
Pe ea ae? ate) F wae “cag? Samy wien a. Sigs Chet SE ert i, SoA SPN ARR I ee ia te peed 

The Knees of ‘the fecola Mop pe Behe ue ae ) Roperr H. Lamporn 333 
From Brute to Man. CHARLES MORBIS ..... +++ + + + +s + e 
Record of American Tooker. I S. K . 351, 489, ad 811, 1037, 1157 
The Homologies of the Fins of Fishes. “(Ulasirated) i E D. Cop ; 401 
A Zoological Reconnoissance in Grand Mañan: TER B iee eee 
Erosive Agents in the Arid Regions. RALPH 8. Tan Aes Cee er o’ 455 
The Concrescence Theory of the Vertebrate. ‘Mabey: * (Ilustrated. ) CHARLEs- 
S pm a a a eS 501, 702 
The es of Plant ax Animal Life Under Changing Conditions of 
nment. PRRsimon PAASER =. =i ee aa ee 517 - 
On the Cl cee tion of the Tastedinaté: Groon BAUR SS. o es 530 
The — e Evidence for the Transmission of paee Characters. 
a a Fis a a aa 
Henry F. Oss 
Methods ee Models in Geographic Teaching. Witwam M. Davis... . 566 

A New Cattle-Pest. (Tustrated. A GoW. Waonros re e ee riS 584 
On a Few California Medusæ. (Ilustrated. ) H WALTER FEWKES. . . . . 591 
Notes on the Habits of Some Amblystomas. 0O. P. Hay... .. - ee 
The Extinct Sirenia. (Jilustrated.) E. D. Cope ..- +--+ +++ ==> 697 
The Notes of Some of Our Birds. Jons Vance CHENEY... ..--.- 
A Means of Preserving the Purity and Establishing a a ie for the Ameri- 
n for the Future. Dr Soat S a Se eee 7 
Origin of the Pla ne-Trees Luster F. Wamp. i) 05. ne ee 
Newly Se Glacial Phenomenai in the as eave Valley. P. Max SOREA e 
aad te Me i Se a A a e e E EE 
The Distribution of Plants. E BPN o 632s ee a 19 
The Mesoder sna the  Ccclom of Varisli ien (Illustrated.) CHARLES- 
abr wine 2 Sees, a ee Se 77 
The hese of “Min nd. E. D. Cop BS eee ie eer oe eee "399, 1000 
The est Spiders of North kaa ae meee): Capano M. WEED ma 
A crc’ from Nova Scotia. (Jd/ustrated.) ae EWKES 
Three Cases of Hypospadias in which ihe Sex s Undeterminable ‘until 
Puberty. Des. L.H.and W.H.Luce . 2. + oe ts ees < 1016 
