LIST OF CONTRIBUTORS. 103 



Leidy, Joseph. Continued. 



Notice of some vertebrate remains from Harden Co., Texas. 



P '68, 174 



Indications of an Elotheriiim in California. P '68, 177 



Notice of some reptilian remains from Nevada. P '68, 177 



Notice of some vertebrate remains from the West Indian 



Islands. P '68, 178 



— Notice of some extinct cetaceans. P '68, 195 



— Notice of some remains of horses. P '68, 195 



— Remarks on a jaw fragment of Megalosauras. P '68, 197 

 Remarks on Conosaurus of Gibbes. P '68, 200. 



— Notice of American species of Ptychodus. P '68, 205 



— On shad from salt water. P '68, 228 



- — Notices of some American leeches. P '68, 229 



— Notice of some remains of extinct pachyderms. P '68, 230 



— On supposed coprolites from the Huronian slates of Minne- 



sota, P '68, 302 



— On iridescence independent of films. P '68, 303 



— On asterism in mica. P '68. 313 



— On fossil bones from Kansas. P '68, 315 



— Notice of some remains of extinct Inseetivora from Dakota. 

 P '68, 315 



— On Wolffia. P '68, Biol. 6 



— On a siliceous sponge, Pheronema. P '68, Biol. 9 



— On Euglena. P '68, Biol. 10 



— Notice of some extinct vertebrates from Wyoming and 

 Dakota. P '69, 63 



— On Megacerops coloradensis. P '70, 1 



— On Poicilopleuron valens and other fossils. P '70, 3 



— On the humerus of a sloth resembling Mylodon robustus, and 



on Dromotherium silvestre. P '70, 8 



— On reptilian remains from the Cretaceous formation near 

 Fort Wallace, Kansas. P '70, 9 



— On a fossil mandible from near Fort Bridger. Wyoming. P 



70, 10 



— On specimens of vertebral bodies from the New Jersey Green 

 Sands. P '70, 10 



— On Ichthyodorulites. P '70. 12 



— On fossil remains from Illinois. P '70, 13 



— On Discosaurus and its allies. P '70, 18 



— On fossil bones from Dakota and Nebraska. P '70. iv-> 



