1891.] Contents. vii 
PAGE. 
pacer amy 670—Some Notes on the Breeding Habits and Em- 
brology of Frogs, 753—Notes on ae Development of ong frome 838 
—Studies in an iip pods; The Regeneration of the Tail of Lumbricu- 
lus; Neuroblasts in the Arth ropod Embryo; Morphological Notes from 
the Biological Laboratory of the Johns Hop kins University, 917— 
Enis of the Sea Bass; The Developmen sA of Hydra; Morphology 
of the Vertebrate pn Di riple Fertilization in Egg of Domestic 
Fowl (Illustrated), 1020—A New Larval Form from Jamaica; Hat- 
schek’s Interpretation of the Annelid REOSHOPNONG AE I EEE oes 1135 
Entomology: A Review of Some aar Curculio Literature, ae 
in Iowa; Indiana Insect Notes; Oviposition of the A Cureulio o 
(Illustrated), 168—Dr. Lintner’ s Sixth Report; Sexual Selection in 
i i ed); Species of 
vi io’ Dectes osus (Il 
Hymenoptera; Papers by Miss Murtfeldt; American ogi Hemip- 
sith n Polished Harvest Spider (Ilustrated), 298—Recent Publica- 
tio Osborn on Pediculi an lop aga ; eneen Tertiary 
Insects ; Packard’s Peron Insect 885th bag eed” and 
Mexican “ J umping Bean,” 673— The White Wax Habits of Coccinella 
convergens ; Tra patceeations of Coleoptars; 761—Entomology at Wash- 
ington, 922—*“ Biological Papers Lepidoptera of Buffalo; Kero- 
sene Emulsion - Oe cece of Aphididw; a Smith on the Rose- 
Chafer ; Heteroptera of Tennesse Tate sof Entomology; Entomo- 
logical "Personals ; hanes Bullet ee Os Ga ee eee 439 
Physiology: Vasomotor Nerves of the Portal Vein; Relations Betwee 
Molecular Weight, Molecular Structure, _ Physiological Action ; Life- 
arei of Blood Corpuscles, 290—Note on oe i pa Instinet in Ani- 
Instance of the Black Snake “Attacking Man 384 
Psychology : Professor Moll on Hypnotism ; Was it Hallucination? The 
Origin of the Erect Tailin the Domestic Dog. . . ........ 170 
Archeology and Ethnology: The Societe d Anthropologie at Paris, 
ciation ; lap o re toric ' Bavar aria, 5—Th e Mexican Tona- 
lamath ; ; d Mij 
of Spy; Continuation and Close of Proceedings of the American 
ciation forthe Advancement of Science. .........-+4.44.. 1084 
Microscopy: a. Nerve-Fibres ; pana dood s Methods with thy 6 
Fish ki ium, 85—Meth 
Me ; Va ification 
Weigert’s M ; Upson’s Gold-Staining Method for Axis Cylinders 
and Nerve Celle: "Methods of Preparing Rotifers, 846—Methods of 
Preserving Human Embryos 
as seit aiid annem ti 185, 298, 399, 505, 593, 681, 849, 
a Pes A ee i 8 ee 1144 
Secunia tae 188, 302, 408, 507, 594, 682, 773, 853, 1039, + - + . . 1145 
