by Contents. 
An Attempt to Reconcile the Differences between Authorities in 
agen to the Maya Calendar and certain dates; also to 
Determine the Age of the Manuscri pts ad ites oie ts > Gyrus Thomas. 6s 5. + + 967 
The ete hiiabetorea: {IIL.. Ph yeophorde Animal eu re- 
lated to Agalma.Ji. 60 ows 5 ge we ese eee « % Walter Fewkes.... + + 772 
The Loess in Central Iowa: .. 2.0 2 ese eee ee ees R, Ellsworth Cali... 4. 782 
Notes on laa Early Lael Stages of the Fiddler Crab and of 
PIOUS ea, 6c a ove a aaie ween ves ee eee, ey A.S. Pa an Be as ot 
lease A; "poctiebeubaal PUSHMCHON S <2 i'8) hse Bie 9p cers Harley Barnes... see 789 
On the corgi and General Characters of the Peach Tree 
h the “ Yellows... . 6.1 ee ee es .W.K. Higley. . « « « ~ 849, 961 
On s0- site Chukchi and Namollo i of Eastern sitasia: WT, Dal vie Wipe 36 857 
The Length of Life of Butterflies... 1. +++ +2 ee .W.H. Edwards ...... 868 
Notes on the Migrations of Birds . Piscetars Mere bts 6 Hees HD. Minot « CW ee ace a 
HONS 6 Gok a eh ee wre were a cat bee Vie eect ges! 9 V. At 
The Fauna of the Nickajack cave... . ++ ee ee ee ree BD, Cape s. ecberd, ‘or en 
Tisisetara . bg See a eames 6 ee ss yl A EAOLIORG oe ee ys 
A Sketch of the Progress ‘of Botany i in the United States in 5 1880. cy E. ay. oi oe wh wee oe 
Effects of Rever Domestic Animals . 3. D. Caton... . 2. +++ 955 
Intelligence in a Snai as pe Roe kes . ~W, H. DA COE Oe 
Botanical dies toa he: Leen e eee ee ete ee Fen R James eee es. 978 
Eprrors’ Taste 
The Un aa States Geological Survey, 39; Lack of Naturalists in large cities, 41 ; Academies 
of Sciences, 41; The sii York Times, 42; The Tariff Laws of the United States, 124; Geo- 
logical Survey of Pennsylvania, 126; Laws of Nomenclature, 219 ; Government aid for a biologi- 
cal survey of the United State, 302; A popes Nae the ae Association si ag van 
Associa tion, 379; Description and Iconography in Biology, 548; Winter course of lectures at the 
Academy of Natural Sciences of Philadelphia, 549; Letter from nae a 550; Insanity and 
Responsibility, 641; Concord Summer School of Philosophy, 724; Mr. Barnes’ fs ang 
Defin nitions, 791; Mining reports and investments, 791; Rules peal Nomenclature, 883 
as a Profession, 987: 
Recent Literatu i 
The Natu bore Directory for 1880, 42; Shell Heaps in Japan, 43; The Botany of California, 
Vol. 11, by Sereno Watson, 44; Balbiani’s Lectures on the eons of Vertebrates, 45; Zittel’s 
Hand-book of Palzontology PS McAlpine’s Biological Atlas, 46; Eaton’s Systematic Fern 
List, 46; The Z af i Record for ee 47; Jow urdan’s Zoantherian Corals of the Gulf of Mar- 
ind gees gta 
entral Nervous Syst ay Reptiles oad Batra ians, 50; Recent Books and Pamphlets, 51 ; 
Report of the Com Src a of Fish and sont for 1878, 
ing Beetles of the United States, 128; Robinson’s Flora of Essex county, Massachusetts, 129 ; 
Seance the can of the F iaakile Institute on Analysis of gre sen : ea of sae 
guistic Science, 131; Molina’s Dictionary of the Aztec Language, t Books and 
3 : Rec 
Pamphlets, 131; Zittet’s Hand-book of Palzontology, 221; Gunther’s Ppl to the Study 
of Fishes, 222; Bruhl’s Zodtomy for Students, 223; Ingersoll’s Friends 
orth Knowi ; 
Gennadios on Phylloxera, 224; Wood's Insect’s Abroad, 224; Recent Books and Pamphlets a Hi 
Wallace’s Island Life, 305; Recent Books and Pamphlets, 310; Genth and Kerr’s Miners of 
North bento, 380; Martin’ s Human Body, 382; Verrill’s Cephalopods of the East Coast of 
North America, 383; Minot’s Studies on the Tongues of Reptiles and Birds 383 ; Natural His- 
tory of rig es 384; Report of the rece Napa of New Jersey, 384; * logtlawts Notes on 
eo . ger ek Recent and Pam 85; Underwood’s Native Ferns, 462; Kent’s 
anual of the Infusoria, 463; Recent a and Beatie sia Semper’s Animal Life as 
affected by the Natural Conditions of Existence ; Anniversa: ; ‘Be 
Memoirs of the Boston So- — 
ciety of Natural History, 552; ent Dvelinesant. of the Squid, 553; Second Report of the 
U.S. Entomological Commission, 554; Recent Books and Pa mphlets, 555; De Quatrefages’ The 
Human Species, 643; The Zodlogical Record for 18 
’ ; H porting Journals, 646; Repoit 
of the Geo sentir t of Canada for 1878-79, 647; Recent Lithological Notices, Sere hes 
Entom Ontario, Canada, 648; a8 — of Indiana, 648; R ks 
and Pamphlets, 648; Report of th ommiss: ; 
Fi Ivania ; 
poorer — pone Laboratory of Johns Hephing University, 727; Hamlin’s ai 
eography an logy of Mt. Ktaadn, 728; Darwin’s Power of Movement in Plants, 729; Re- 
