96 LIST OF CONTRIBUTORS. 



Leidy, Joseph. Continued. 



On a spicula of bone in the lamina of the dura mater. P 



'47, 198 



On crystals in Parmelia. P '47, 210 



On the cranium of a New Hollander. P '47, 217 



On an entozoon in Helix. P '47, 220 



On an optical illusion in man. P '47, 243 



On Squatina dumerili. P '47, 247 



Description and anatomy of a new and curious subgenus of 



Planaria. P '47, 248 



— Descriptions of two new species of Planaria. P '47, 251 



— On the fossil horse of America. P '47, 262, 328 



— On the destructibility of animal tissues. P '47, 313 



— On a new genus and species of fossil Ruminantia, Poebrothe- 

 rium wilsoni. P '47, 322 



— On the eye in the perfect Cirrhopoda. P '48, 1 



— On the hair of a Hottentot boy. P '48, 7 



— ■ On some bodies in the boa constrictor resembling the 



pacinian corpuscles. P '48, 27 



— On a new fossil genus and species of ruminantoid and 

 Pachydermata, ( Mery coidodon culbertsonii). P '48, 47 



— On the development of the purkenjean corpuscle in bone. 



P '48, 116 



— On the intimate structure of articular cartilage. P '48, 117 



— On the arrangement of the areolar sheath of muscular fasci- 

 culi and its relation to the tendon. P '48, 119 



— On the existence of the intermaxillary bone in the embryo 



of the human subject. P '49, 145 



— On the cartilages of the Cephalopoda. P '49, 169 



— Tapirus americanus fossilis. P '49, 180 



— On the existence of Entophyta in healthy animals as a na- 

 tural condition. P '49, 225 



— ■ On the odoriferous glands of the Invertebrata. P '49, 234 



— On a new species of Entophyta. P '49, 245 



— Descriptions (accompanied by drawings) of new genera and 



species of Entophyta. P '49, 249 



— On generation. P '50, 7 



— On Entophyta. P '50, 7, 8 



— On crystalline bodies in the tissues of organisms. P '50, 32 



— On species of Annelida abrancbia. P '50,34 



— Descriptions of new Entophyta growing within animals. P 

 '50, 35 



