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CONTENTS. 



Thos. Meehan. On change of structure in Orchids 



. 205 



Jos. Leidy, M.D. Remarks on the Occurz'ence of an Extinct Hog 



in America 207 



E. D. Cope. On a skull of Sus scropha 207 



E. D. Cope. On an Anourous Batrachian from the Eocene of 



Wyoming 207 



Andrew Garrett. Descriptions of new species of Marine Shells 



inhabiting the South Sea Islands 209 



Andrew Garrett. Description of a new species of Goniodoris 232 

 Andrew Garrett. Descriptions of new species of Land Shells 



inhabiting the South Sea Islands 233 



Bernard A. Hoopes. Description of a new variety'' of Buteo . 238 

 Thos. Bland and W. G. Binney. On the Lingual Dentition and 

 Jaw of certain Terrestrial Pulmonata from the United 

 States, with remarks on their systematic value . . . 240 

 Jos. Leidy, M.D. On Iron Pyrites in Coal .... 257 



Jos. Leidy, M.D. On a specimen of Mus rattus . . . 257 



Jos. Leidy, M.D. On Dufreynite 257 



J. L. Leconte, M.D. Remarks on the death of Friedricii Er- 

 nest Melsheimer, M.D 257 



Jas. Worrall. Letter on the introduction of California Salmon 258 

 Jos. Leidy, M.D. Remarka,on Extinct Mammals from California 259 

 Jos. Leidy, M.D. Fungous Parasite on a Mouse . . . 260 

 Theodore Gill, M.D. On the Affinities of the Sirenians . . 262 

 Thos. G. Gentry. Observations on changes in structure of a 



Larva of Dryocampa imperialis 274 



Thos. Meehan. Double Flowers in Epigaea repens . . . 276 

 Thos. Meehan. Influence of Cohesion on change of Characters 



in Orchidete . . ....... 276 



[FOR REMAINDER OF CONTENTS, SEE 3d PAGE.] 



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