334 PROCEEDINGS OF THE ACADEMY OP [1883. 



REPORT OF THE PROFESSOR OF INVERTEBRATE 

 PALAEONTOLOGY. 



The Professor of Invertebrate Palaeontology respectfully begs 

 to report that during the past year he has delivered a course 

 of twenty-six lectures on ph3^siographic geology and palseon- 

 tologj', which course, extending through the months of January, 

 February and March, as in previous years, was attended in prin- 

 cipal part by teachers belonging to the various institutions of 

 learning of the city. 



He further reports that the collections under his immediate 

 supervision have been materiall}' improved through identifications 

 iind re-determinations incident to study, and this more particularly 

 in the special fields of Tertiary and Cretaceous palaeontology ; 

 in the latter department the institution is largel}- indebted to 

 Prof R. P. Whitfield, of New York city, for numerous determi- 

 nations of the fossils belonging to the State of New Jersey. 

 The additions to the palaaontological department of the Academ3''s 

 museum, which are recorded elsewhere, have been inconsiderable, 

 but it is hoped that local exchanges will shortl}- be instituted, 

 whereby valuable accessions to an already very extensive collec- 

 tion will be insured. 



A course of lectures, beginning with about the middle week of 

 January, and embracing a discussion of the physical history and 

 palaeontology of the States of Pennsylvania and New Jerse}', has 

 been arranged for the coming year, 



Yery respectfully, 



Angelo Heilprin, 

 Professor of Invertebrate Palaeontology. 



REPORT OF THE PROFESSOR OF MINERALOGY. 



The Professor of Mineralogy respectfull};- reports that during 

 the past year a course of lectures, upon the mineralogy, litholog}'- 

 and geology of Philadelphia and vicinity, has been delivered, 

 alternately in the lecture room of the Academy and in the field, 

 The course treated of mineralogy in its relation to lithology and 

 geolog}', and of geology , both structural and historical, with special 

 reference to the formations in the vicinity of the city. The 



