b 



Proceedings . 31 



Secretary Hall related what had occurred concerning the Menage 

 Expedition to the Philippine Islands, and stated in a general way what 

 collections had arrived from that expedition since last May, summarizing 

 as follows: The work of the expedition in the Philippine Islands closed 

 May 8 but just before that date, Mr. D. C. Worcester w^as taken ill with 

 fever and was obliged to leave his work and Mr. Bourns started for Borneo 

 where he was to make collections for the purpose of comparing the faunal 

 conditions of that island w^ith those of the Philippine Islands where work 

 had been prosecuted for over two years. Mr. Worcester recovered suffic- 

 iently from his illness to reach California in June by the way of Japan and 

 the Sandw^ich Islands at which places he made arrangements for museum 

 exchanges. Mr Bourns on finishing work in Borneo came to America by 

 the way of Europe. At the British Museum he arranged for exchanges for 

 Philippine Islands material. Owing to the financial condition in Minneap- 

 olis it has been found impossible to raise the money and prosecute the work 

 of describing new species arranging the material and making exchanges, as 

 had been planned, with the employment of Messrs. Worcester and Bourns 

 in Minneapolis ; but it is hoped by another season this work can be prose_ 

 cuted to completion. 



December 26, 1893. 



Postponed meeting of the Academy of Sciences. 

 Sixteen persons present. 

 The following papers were read: 



Preliminary remarks on the rodent Dipolotnys ordii by 

 President Osbom. ' 



To illustrate the points in the Dipolomj^s President Osborn exhibited 

 a skull and a few other bones of nearly related forms ; several plates were 

 also exhibited illustrating the skeleton as a whole. 



Notes on the Anorthosites of northeastern Minnesota by 

 A. H. Elftman. 



The paper reviewed the observations of Dr. A. C. Lawson upon these 

 rocks. The anorthosites are considered to be detached blocks inclosed in 

 the diaboses of the Lower Keweenawan. The mineral composition also 

 varies more than geologists have generally understood. 



In the discussion of the paper H. V. Winchell called attention to the 

 fact that in the Annual Report of the Geol. and Natural History Survey of 

 Minnesota for 1887 notice was taken of several enormous blocks of 

 Animike strata which appeared to be pieces floating in the great Gabbro 

 overflow surrounding them. Their position points to their being torn off 

 at the time of eruptive activity and moved from their original site to their 

 present situation. 



Evolutionary development in some species of Brachi- 

 opoda, by F. W. Sardeson. 



