INDEX-GLOSSARY. 381 



J 



Japan, 348. 



Jaws, 125; Upper j., 182, 236, 275, 325; Lower j. = mandible, q.v. 

 Jejunum, in human anatomy The part of the small intestine whicli imme- 

 diately succeeds the duodenum, and is followed by the ileum, 286. 

 Jelly-fish, 27. 



K 



Karyokinesis (xapvov, a kernel ; /averts, movement) A method of cell- 

 division in which the nucleus undergoes complex changes, 72. 



Katabolism (/ca-ra/SoXr), a casting down) The breaking down of complex 

 substances into simple ones, 9, 315. 



Keber, organs of, 118. 



Keel, 239. 



Kidney, 98, 118, 129, 166, 228, 250, 265, 295, 316, 333. 



Knee, 176, 230, 269. 



Labial palps, 112. 



Labrum (labrum, a lip), in Astacus The upper lip, 89. 



Labyrinth, Membranous, in VertebratesThe sac which forms the essential 

 part of the auditory organ, 172, 219, 255, 273 ; Bony 1. The compact 

 layer of bone which, in higher vertebrates, surrounds the membran- 

 ous 1., 255. 



Lacteal A lymph-vessel belonging to the gut, 248. 



Lacuna (lacuna, a cavity) An interstice between the constituents of a 

 tissue, 188. 



Lamella (dim. of lamina, a plate), 117. 



Lamellibranchiata (lamella ; fipdyxia, branchiae, gills of fish), 341. 



Lamina inferior, 328 ; 1. perpendicularis, 275, 323 ; 1. terminalis, 225. 



Lamprey, 153. 



Lancelet = Amphioxus, q.v. 



Larva A free-living embryo differing from the adult in form, 107, 122, 

 151, 222. 



Larynx (^f>i>7, used with the modern meaning), in Vertebrate The 

 modified top of the trachea, usually serving as an organ of voice, 204, 

 248, 293. 



Lateral line, 155. 



Laurer's canal, in the Fluke A tube by which the oviduct opens on the 

 dorsal surface, 28, 33. 



