CONTENTS. ix 



PAGE. 



4. Bone-tissue 218 



History 218 Bone-corpuscles 221 



Methods 220 



Varieties of bone-tissue 223 



(a) Cancellous, epiphyseal, or Periosteum 228 



spongy bone-tissue 223 Blood-vessels 230 



(b) Cortical or compact bone- Medulla of bone 230 



tissue 225 



The relation of the systems of lamellae to the blood-vessels 231 



Development of bone 236 



(A) Development of bone from (c) Formation of red blood-corpuscles 

 cartilage 238 and blood-vessels 243 



(a) Calcification 238 (d) Formation of bone from medulla. . 247 



( b) Formation of medullary tis- 

 sue 242 



The Process of Ossification in Birds. By A. L. Schoney 251 



(B) Development of bone from (C) The growth and retrogression of 

 fibrous connective tissue 254 bone 258 



VIII. MUSCLE-TISSUE 262 



1. Smooth or unstriped muscle 263 



2. Striped muscle 265 



The Structure of the Muscle of the Lobster. By M. L. Holbrook. . 274 



IX. NERVE-TISSUE 279 



1. Nerve-centers 280 



(A) Brain 280 (E) The connective tissue investments 



The origin of the cerebral of the brain and the spinal cord ... 292 



nerves 282 Dviramater 292 



(B) Gray substance 283 Arachnoidea 293 



(C) Ganglionic elements 285 Pia mater 293 



(D) White substance of the (F) The ganglia 293 



spinal cord 290 



2. Nerves 294 



(a) Medullated nerves 295 (b) Non-medullated nerves 298 



3. Terminations of nerves 298 



(a) Termination of medullated (b) Termination of non-medullated 



nerve-fibers 299 nerve-fibers 300 



Development of nervous tissue 302 



Methods for the preparation of nerve-tissue 303 



Analysis of bioplasson in its relations to nerve-action 305 



X. EPITHELIAL AND ENDOTHELIAL TISSUE 311 



Definition 311 



Peritoneum 315 Crystalline lens 316 



Division - 318 



Single epithelial layers 321 Stratified epithelial layers 322 



Termination of nerves 323 



Glands 325 



Performances of epithelium 327 



(a) Watery secretion 328 (c) Fatty secretion 332 



(b) Mucous secretion 329 



