Proceedings.] 214 Oct.l, 



General Meeting, Oct. 1, 1884. 



The President, Mr. S. H. Scudder in the chair. 



The President announced the death, during the vacation, of 

 Francis Gregory Sanborn, the well-known entomologist and as- 

 sistant in the Society's Museum, from 1867-1872. 



Mr. S. Garman discussed the classification of sharks and par- 

 ticularly the relationship of the curious form Chlamydoselachus, 

 shown by him to the Societ} 7 last winter. 



Professor A. Hyatt described a new and singular form of Ceph- 

 alopod, which he called Stereotaeceras, and which was known only 

 by fragments of the huge siphon. 



Mr. Scudder alluded to Mr. Forel's recent investigation of the 

 rate of glacial motion in the Alps. Part of the boulder behind 

 Agassiz's station on the Aar glacier was identified this sum- 

 er and its present position gave the mean annual rate of move- 

 ment in the median moraine as 5o£ metres. 



General Meeting, Oct. 15, 1884. 



Mr. S. Garman in the chair. 



Prof. A. Hyatt described the statoblasts of Chalinula arbuscula 

 from Annisquam which closely resemble those of Spongilla and 

 whose existence breaks down the distinction between the fresh 

 water and marine sponges based on the supposed presence or ab- 

 sence of statoblasts in these groups. 



Section of Entomology, Nov. 25, 1884. 



The President, Mr. S. H. Scudder in the chair. 



Mr. J. H. Emerton reviewed Kaiserling's Therididae Ameri- 

 canae and the fifth volume of Simon's Arachnees de France, which 

 also includes the Therididae, and discussed the s} T stems of classifi- 

 cation of this family proposed by these authors and himself. 



Mr. Scudder showed drawings of a carboniferous Telephonus 

 recently discovered at Mazon Creek, while a similar species of the 

 same age was simultaneously found in Europe. 



