\.\>T OF CONTRIBUTORS. 



153 



Potts, Edward. Continued. 



On the wide distribution of some American sponges. 1' '84, 215 



On the minute fauna of Fairmount reservoir. P '84, 217 



An unfamiliar rhizopod. P '84. 292 



A new fresh-water sponge from Nova Scotia. P '85, 28 



■ Fresh-water sponges from Newfoundland: a new species. 



P '86, 227 



Contributions towards a synopsis of the American forms of 



fresh- water sponges, with descriptions of those named by other 

 authors and from all parts of 'the world. P '87, 158 

 Powell, James E. On the habits of the moose. P '55, 342 

 Powel, R. H. On poison from sweet oil of wine. P '60, Biol. 1 

 Powel, Samuel. On supposed volcanic agencies. P '58, 8 



On binocular vision. P '60, 99 



Pratten, Henry. See Norwood, J. G., and Henry Pratten 

 Prime, Temple. Synonymy of the Cyclades, a family of Aceph- 

 alous Mollusca. Part I. P '60. 267 ; II, '61, 25 



Description of new species of Cyrena, Corbicula and 



Sphaeriuin. P '61, 125 



Description of three new species of Mollusca of the genus 



Sphayrium. P '61, 414 

 — Monograph of the species of Sphaerium of North and South 



America. P '61, 402 ; '62, 28 

 Putnam, F. \V. Indian mounds on the Miami River. P '84, 20 

 Quinby, J. B. Mineral resources and physical geography of Peru. 



P '41, 82 



Spontaneous combustion of bituminous coal. P '41, 121 



Rand. Theodore D. On uranite. P '55, 286 



On cyanide and nitride of titanium. P '55, 409 



On a new mineral in cryolite. P '68, 142 



On a remarkable exposure of rocks near Philadelphia. P 



'70, 134 



— : — Notes on feldspar and some other minerals of Philadelphia 



and vicinity. P '71, 299 



— On the rocks near Philadelphia. P '77, 251 



— On a belt of serpentine and steatite in Radnor Township, 



Delaware County, Pa. P '78, 402 



— Serpentine belts of Radnor Township, Delaware County. 

 P '80, 225 



— Change of serpentine into quartz. P '80. 241 



— A new locality for millerite. P '80, 243 



