162 LIST OF CONTRIBUTORS. 



Ryder, Jno. A. Continued. 



A dog with supernurneray toes. P '77, 321 



On the mechanical genesis of tooth-forms. P '78, 45 



On Polyxenes fasciculatus. P '78, 223 



Description of a new species of Smynthurus. P '78, 335 



Morphological notes on the limbs of the Amphiuniidae, as in- 

 dicating a possible synonymy of the supposed genera. P '79, 14 



Further notes on the mechanical genesis of tooth-forms. 



P '79, 47 



Notice of a new pauropod. P '79, 139 



Description of a new species of Chirocephalus. P '79, 148 



Honey glands on Catalpa leaves. P '79, 161 



The larva of Eurypauropus spinosus. P '79, 164 



Description of a new branchipod. P '79, 200 



The structure, affinities and species of Scolopendrella. P 



'81, 79 



On a tumor in the oyster. P '87, 25 



On the first and second sets of hair germs developed in the 



skin of foetal cats, P '87, 56 



The plaeentation of the two-toed ant-eater, Cycloturus 



didactylus. P '87, 115 



— On the homologies and early history of the limbs of verte- 

 brates. P '87, 344 



— On the resemblance of the primitive Foraminifera and of 



ovarian ova. P '88, 73 



— On the fore and aft poles, the axial differentiation and a 

 possible anterior sensory apparatus in Volvox minor. P '89, 138 



— Heterocercy in Batrachia. P '89, 155 



— The hypertrophied hairs on Ampelopsis. P '89, 155 



— The functions and histology of the yolk-sack of the young 

 toad-fish. P '90, 407 



— On two new and undescribed methods of contractility mani- 



fested by filaments of protoplasm. P '91, 10 



— An attempt to illustrate some of the primary laws of me- 

 chanical evolution. P '91, 62 



— Diffuse pigmentation of the epidermis of the oyster, due to 



prolonged exposure to the light ; regeneration of shell and loss of 

 adductor muscle. P '92, 350 



— The hermaphroditism and viviparity of the oysters of the 

 northwest coast of the United States. P '92, 351 



— On the mechanical genesis of the scales of fishes. P '92, 219 



