1894.] NATURAL SCIENCES OF PHILADELPHIA. 479 



exchange or by purchase, and also numerous specimens from the 

 Zoological Society of Philadelphia, among which may be mentioned 

 specimens of Struthio molyhdophanes and Dromius irroratus. 



The Delaware Valley Ornithological Club has added many 

 attractive groups to the collection of Pennsylvania and New Jersey 

 birds which is rapidly approaching completion. 



At the annual meeting of the Section held December 17, 1894, 

 the following officers were elected: — 



Director, . . ' . 



Vice- Director, 



Recorder, 



Secretary, 



Treasurer and Coiiservator, 



Dr. Spencer Trotter. 

 Geo. S. Morris. 

 Stewardson Brown. 

 Chas. E. Ridenour. 

 Witmer Stone. 

 Respectfully submitted, 



Wither Stone, 



Conservator. 



REPORT OF THE PROFESSOR OF INVERTEBRATE 



PALEONTOLOGY. 



The Professor of Invertebrate Paleontology respectfully reports 

 that, as heretofore, he has delivered his regular spring courses 

 of lectures, twenty-five in number, the attendance at w'hich has been 

 larger than in any previous year. These lectures, embracing in great 

 part the physiographic features of the region about Philadelphia, 

 were supplemented by weekly field parties, and by two special sum- 

 mer class excursions: one to the region of the Shawangunk and 

 Delaware Mountains, the other to the Bermuda Islands. On the 

 first of these excursions the methods of topographical surveying were 

 practically demonstrated in addition to the regular work in geology 

 and paleontology. Two new fossil-bearing localities in the Trias 

 were discovered in the course of the spring excursions. 



The collections in the department of Invertebrate Paleontology 

 have not been materially augmented during the year, nor has their 

 condition been very greatly changed. Much has been done to- 

 ward determining and redetermining unidentified or doubtful forms, 

 and from many specimens hitherto unofficially labelled — i.e., not 



