PHYSIOLOGICAL. 
Gen. Sub. 45 
Periodicity of growth [see Embryological and Variation ] ; Fischel 
( 222 ). 
The sense of sight : a new theory ; Bernard (61). — Physiology of 
compound eyes ; Chun (117). — The nature of vision in marine animals 
at great depths ; Chun (117). — The optic-sense (Lichtsinn) of eyeless 
animals ; Nagel (494). — Light perception in lower animals ( Lum - 
bricidcn ) ; Hesse (933). — Visual powers of higher animals ; Schleicii 
(613). — Evolution of sight; Edingeii (186). — Pigment-migration in the 
eyes of Palcemoneies ; Parker (520). 
Otocysts and equilibration in Crustacea ; Clark (118). — Adaptation of 
-ear to aquatic life in Mammals ; Hennicke (320). 
Skin sense-organs ; vom Rath (554). — Integumentary innervation in 
Arthropoda ; Holmgren (338). 
Function of lateral sense-organs; Bonnier (75). — Functions of lateral 
line ; Richard (568). 
Physiological conception of the stomach, gastric digestion and prepara- 
tion for intestinal digestion ; absence of a true stomach in many Verte- 
brates; Oppel (508). — Proteid digestion by salivary juice of insect 
larvae, &c. ; Nagel (493). — Regeneration of mucus epithelium in the 
alimentary tract of Amphibia. The mucus-cells arise in deeper strata, 
are secretory before they reach the surface, are specific elements before 
they attain their final position ; Sacerdotti (595). 
Reactions of Metridium to food and other substances ; Parker (518). 
Regulation of temperature in hibernating animals ; Pembrey & Hale 
White (533). — Physiology of hibernation, sleep, and animal heat, with 
-especial reference to the marmot; Dubois (175). 
Animal temperature : a problem in evolution ; Quinton (548). 
Locomotion of Vertebrates ; Bickel (67). — Circular movement, funda- 
mental in animals ; Guldberg (286). — Polar phenomena of muscle ; 
Lahousse (389). 
Physiological import of air-spaces in flying animals ; von Lendeneeld 
( 4i°). 
Theory of galvanotropism, experiments on Vertebrates ; Loeb & 
Gerry (424). 
The physical basis of animal phosphorescence ; Watask (702). — New 
researches on luminosity in animals ; Dubois (176). — Luminosity of 
Euphausiidcc, &c. ; Ciiun (117). — Seat of phosphorescence in Euphausiidce; 
Giesbrecht (263). — Phosphorescence in marine animals, popular dis- 
cussion ; Wasmann (701). 
Primitive skeletal tissue in pelagic larvae of Polychccta\ Haecker (297). 
Iron in the animal body ; Hall (300). 
Argon in swim-bladder of fishes and Physalia ; Sciitaesing & Richard 
( 614). — The gas in the bladder of fishes and Physalia ; Richard (567). 
Reflex bleeding, a means of defence in certain insects ; Cuenot (138, 
139). 
Phagocitosis in lower Vertebrates ; Ramon y Cajal (551). — Phago- 
cytic organs in Oligochceta ; Schneider (615). — Phagocytosis in oysters ; 
Ciiatin (115). — Phagocytosis, &c., in leeches ; Kowalevsky (381). — 
Phagocytes in degenerating ova of Bryozoa ; Krjepelin (382). — Lympho- 
cytes of Oligochceta ; Rosa (577). 
Animals free from Bacteria ; Nuttall & Thierfelder (504). — 
Animal life without Bacteria; De Varigny (678), Galiite (244). 
Parasitic castration of Donax by a Trematode ; Pelseneeii (532). 
Bibliographica physiologica ; Richet (569). 
