INDEX. 



519 



ff. aspersa, cells in liver, 414 ; kidney 



of, 415 

 Helmholtz on reflected light acting on 



the grey cellular layer of the retina, 



269 

 Henle, System of Anatomy referred to, 



231 ; on epithelium-cells of glands 



and follicles, 412 

 Hip-joint, general mechanism of, 513, 



514 



Human anatomy supplies keys for mor- 

 phological solution of parts in pre- 



sphenoidal sclerotome in birds, etc., 



157 

 Human body, beauty of, arising from 



certain symmetrical and geometrical 



forms, 215-219 

 Hunter (John), account of the Gymnotus 



eleclricus referred to, 292 ; Natural 



History of Teeth referred to 20, etc. 

 Hi/as, testis of, 430 ; spindle-shaped 



cells, 432 

 Hydatula gadorum, Kathke, 497 



INCISIVES (central), how they pass 

 through the gum, 37 ; (superior) 

 teeth, tardy development of, 45 



Inductive philosophy promoted the ad- 

 vance of physical science, 206 



Infant eight or nine months old, state of 

 teeth in, 24 



Inflammation of membranes, 438 



Infusorial animalcules on filaments of 

 conferva of gold-fish, 350 



Intermaxillary bones and incisors, 46, 

 47 



Internal lamella of Blake, 33 



Internuncial cord in electrical fishes, 289 



Intestinal glands, on a diseased condition 

 of the, 372-378 



Intestinal villi, the structure and func- 

 tions of, 393-402 



Ivory of elephant's tusks, musket-bullets, 

 etc., inclosed in, 56-65 



JACOB'S membrane of retina, 274 



Janthina fragilis, mantle and its secre- 

 tion, 416, 425 



Joint-surfaces of mechanicians and of 

 organic structures, differences of, 246 



Jonquil, electric current at time of 

 flowering, 315 



KEY (Aston) on the ulcerative process 

 in joints referred to, 408 



Kidney and liver, structure and patho- 

 logical changes in, 379-383 ; appendix 

 to this paper, 383-386 ; granular de- 

 generation of, 379-381 



Kiernan, researches into the healthy and 



morbid structiTre of human liver, 381 

 Klockner, gold ball found in tusk of 



elephant, 57 

 Knee-joint, anatomy of human, 220-230 ; 



mechanism of, 231-245 

 Knees in female brought together, 218 

 Knox (Dr.) on tooth-substances, 62 ; on 



the troughs in gymnotus, 292 ; (F.) 



tooth-germs in foetus of whale, 54 

 Kolliker on the rods and cones as the 



seat of the impression of light in the 



retina, 269 



Lcemodipoda, testis in, 433 



Lamina spiralis of the cochlea, 282-288 



Land-crabs of tropics, 429 



Langer forms continued screws from 

 upper articular surface of astragalus 

 in horse, etc., 237 



Lathy rus tuberosus, electrical currents 

 in tubers of, 313 



Law of the excitation of nerves by 

 electrical current, 337, 338 ; of 

 force, how made out by Sir Isaac 

 Newton, 212 ; of production, what 

 may prove to be, 213 



Laws regulating the development of 

 pulps and sacs, and period of appear- 

 ance of each tooth-germ, 48-50 



Lawrence on growth of orifices produced 

 by balls in ivory, 58, 59 



Leaves, Becquerel's observations of 

 electrical currents in, 314 



Leptopodia, testis of, 430 



Leydig on structure of simple and com- 

 pound eyes, 279 



Liebig on power possessed by vapours 

 of carrying along with them portions 

 of bodies which in their solid form 

 resist dissipation by very high tem- 

 peratures, 362 



Light, mode in which it acts on the 

 retina, 273-281 



Lily (white), electrical current at time 

 of flowering, 315 



Limbs, Goodsir on the morphological 

 constitution of, 198-203 ; organ in 

 crabs which supplies germs for, 472 



Limitary layer of the retina, 267 



Liver, observations on structure and pa- 

 thology of, 381-386 ; the natural habi- 

 tat of the acephalocyst, 476 ; (human) 

 nucleated cells of, 415, 416 



Logarithmic spiral in shells, 209-211 ; 

 probably the law at work in the in- 

 crease of organic bodies, 213 



Loligo sagittata, secreting membrane of 

 ink-bag, 413 ; liver of, 415 



